How Much is the Smallest Fiberglass Pool?

Posted on October 14, 2022June 11, 2026 by kristin

We can’t read minds, but chances are that if you landed here by searching “How much is the smallest fiberglass pool?”, you are interested in both a small fiberglass pool and are concerned with costs. In this post, we’ll define small fiberglass pools and address some cost-related questions.

About Small Fiberglass Pools

Many fiberglass pools are over 600 square feet (e.g., more than 37.5 feet long by 16 feet wide). Comparatively speaking, a small fiberglass pool may be under 400 square feet. This size will fit into many smaller yards, take up less space, and is still fun and functional. To give you an idea of what that looks like, here are some Thursday Pools small fiberglass pool designs and their dimensions:

Small Fiberglass Pool Prices

Our general suggestion for getting a rough ballpark estimate for our fiberglass pools is to multiply your linear square feet by $1500. Of course, it’s more complicated than that, and you would need to get an estimate from a pool dealer near you to get firm numbers. Every case is different, and fiberglass pool prices vary according to a number of factors, including:

Installation Factors Affecting Pool Prices

Ease or difficulty of accessing your backyard
Excavation complications (e.g., rocky or sandy soil)
Permits and variances
Barrier requirements (e.g., fencing or safety pool cover)
Electrical work
Plumbing (especially rerouting septic fingers)
Dirt hauling
Standard pool equipment (filtration system, skimmer and jets, a vacuum head and pole, vacuum hose, skim net, wall brush, thermometer, and chemical test strips)
Additional pool equipment (e.g., pool heater, automatic vacuum system, salt generator)
Backfill
Restoration

Optional Factors Affecting Pool Prices

Landscaping and hardscaping costs
Patio furniture
Ladder
Slides
Mosaic tile
Specialty lighting (such as LED lights)
Water features such as deck jets, bubblers, and waterfalls
Swim jet system or spa features

Are Small Pools Cheaper?

Yes. Generally speaking, small pools are less costly than larger pools. Not only do they save space in your backyard, but they also cost less to build initially due to fewer building materials being used and easier installation. Additionally, they cost less to maintain. A smaller pool requires less water and fewer chemicals and is generally easier to maintain than a larger pool.

Are Fiberglass Pools More Expensive?

Fiberglass pools are inground pools that are more expensive than above-ground pools. They are typically more expensive than a vinyl liner pool, but according to Home Guide, a fiberglass pool is generally 10 to 20 percent cheaper than a gunite pool. Additionally, fiberglass pools cost less to maintain than traditional pools. Over the course of 10 years, a fiberglass pool will save you 75 percent on maintenance costs as opposed to a concrete pool.

How Much Does a Fiberglass Pool Cost?

Fiberglass pools range from $45,000 to $85,000 on average, but smaller pools may run less. Use the Thursday Pools Pool Cost Calculator to get an estimate for your pool project based on size and desired options. This tool can help you better understand the cost breakdown behind your pool.

Whether you are looking for a small fiberglass pool because you have a small backyard or you are trying to save money, our best advice is to let us get you in touch with an independent pool dealer in your area. A pool dealer can give you the best estimate based on all the factors that affect pool pricing and can answer your project-specific questions.

What Sizes Do Fiberglass Pools Come In?

Posted on October 14, 2022June 19, 2026 by kristin

Most people shopping for a fiberglass pool already know they want one. The harder question is what size actually fits your yard, your family, and the way you plan to use the pool. The range is wider than most people expect, from compact plunge pool models and small fiberglass pools to full-size 16′ x 41′ designs with room for lap swimming and a crowd. Choosing the right size starts with three factors: available yard space, how many people will use the pool, and whether you want it for lounging, play, exercise, or entertaining.

Why Fiberglass Pool Width Stops at 16 Feet

Before getting into specific sizes, there is one constraint that shapes the entire fiberglass pool industry: width.

Fiberglass pools ship as one-piece shells. This construction method supports faster installation, eliminates liner seams, and creates a strong one-piece shell, but it also means the pool must travel by road to reach your backyard. Most states set an oversized load limit of 16 feet, capping fiberglass pool width for every manufacturer. If your plans call for a pool wider than 16 feet, a custom concrete or vinyl liner build is the path to get there. For most residential backyards, 16 feet of pool width is more than enough to enjoy with a large family, and while entertaining guests.

Small Fiberglass Pool Sizes: Plunge Pools and Compact Designs

Small fiberglass pools generally fall under 400 square feet. Plunge pools, sometimes called cocktail pools or spools, occupy the smallest end of this range, typically 8 to 12 feet wide and 16 to 26 feet long.

These pools work well when yard space is limited, when you want the pool to complement your outdoor living area rather than dominate it, or when a smaller footprint makes more financial sense. The Thursday Pools Plunge Pool Series is built specifically for this range. Small fiberglass pools are best for homeowners who want cooling, lounging, or light exercise more than open swim space.

Pool Model	Dimension	Depth	Square Feet
The Drift	8’4″ x 16′	4’8″ flat bottom	134
The Nest	8’4″ x 16′	4’8″ flat bottom	134
The Nook	8’4″ x 16′	4’8″ flat bottom	134
Sea Turtle	9.5′ x 19.5′	4’6″ flat bottom	185
Titus	12′ x 26′	5’5″	300
Aspen	12′ x 25′	5’1″	300
Goliath	12′ x 25′	5’4″	300

The Nest, The Nook, and The Drift share the same 8’4″ x 16′ footprint and 4’8″ flat-bottom depth, but each uses the space differently. The Drift has a full-length wraparound bench for lounging. The Nook uses bench seating on both sides. The Nest keeps a more open swim area with full-width entry steps. Sea Turtle steps up to 9.5′ x 19.5′ at 4’6″ flat-bottom depth and has a swim-jet-ready design for light exercise.

Medium Fiberglass Pool Sizes: The Most Popular Range for Families

Medium-size fiberglass pools, roughly 13 to 16 feet wide and 28 to 37 feet long, give most families the balance they need. There is enough length for laps and active play, enough width to move around comfortably, and room for the kids without the pool consuming the entire backyard.

This is also where the widest variety of design options lives, from sport-depth flat-bottom pools to models with tanning ledges, integrated spas, and beach entries.

Pool Model	Dimension	Depth	Square Feet
Pearl	15’ x 25’	3’9”	375
Lil Bob	13.5′ x 27.5′	4’6″ flat bottom	371
Lil Bob LX	13.5′ x 35.5′	4’6″ flat bottom	479
Spirit	13.5’ x 40’	4’6″ flat bottom	540
Cathedral	14’ x 33’	5′	462
Titus	14’ x 33’	5’10”	462
Sun Day	15′ x 30′	5’4″	450
Aspen	14′ x 30′ / 14′ x 35′ / 16′ x 35′	5’5″	420 – 560
Goliath	14′ x 29′ / 14′ x 33′ / 16′ x 33′	5’8″ – 6′	406 – 592
Grace Beach Entry	14′ x 36′	5’6″	504

Large Fiberglass Pool Sizes: Maximum Room to Swim and Gather

Large fiberglass pools start around 16′ x 39′ and top out at 16′ x 41′. At this scale, the pool becomes the primary focus of the backyard. The design, depth, and feature set matter as much as the footprint. Large models make the most sense when the pool will be used for frequent entertaining, active swimming, or as the main feature of the outdoor space.

Pool Model	Dimension	Depth	Square Feet
Mack Daddy	16′ x 36′	4’8″ flat bottom	576
Magnate	16′ x 36′	4’8″ flat bottom	576
Grace Beach Entry	16′ x 36′ / 16′ x 40′	5’6″ – 5’10”	576 – 640
Wellspring	16’ x 36’ / 16′ x 40′	5’10”	576 – 640
Cathedral LX	16’ x 36’ / 16′ x 40′	5’8” – 6′	576 – 640
Aspen	16′ x 35′ / 16’ x 40’	5’5″ – 5’10”	560 – 640
Big Bob	16′ x 40′	4’6” flat bottom	640
Monolith	16′ x 40′	8’6″	640
Sandal Beach Entry	16′ x 34.5′ / 16′ x 39′	5’8” – 6′	552 – 624
Sun Day	16′ x 34.5′ / 16′ x 39′	5’8” – 6′	552 – 624
Goliath	16′ x 37′ / 16′ x 41′	6’4” – 6’8″	592 – 656

At this scale, Big Bob is a 16’ x 40’ rectangle offering a uniform 4’6” flat-bottom depth throughout. It’s the largest pool in the Bob family, built for homeowners who want maximum bench seating, a wide-open swim and play area, and room to comfortably host a crowd. Monolith is at the opposite end of the depth range, with an 8’6″ deep end that makes it the only Type 1 diving pool in Thursday Pools’ lineup.

How to Choose the Right Fiberglass Pool Size for Your Backyard

Size on paper and size in your yard are different things. A 16′ x 40′ pool can be exactly right for a spacious lot and feel overwhelming in a modest suburban backyard. A few practical factors to weigh before committing:

Yard dimensions and required setbacks: The pool needs clearance from property lines, fences, utilities, and structures. A local dealer can evaluate your specific lot before you choose a model.

How you plan to use it: A family of four that swims laps and plays water basketball needs a different pool than a couple looking for an evening plunge. Intended use matters more than square footage.

Budget, including long-term operating costs: Longer pools cost more to install and maintain. A larger water volume takes more energy to heat and more chemicals to balance. Factor those ongoing costs into the size decision, not just the installation price.

Space for everything else: The pool is one part of the backyard. Consider how much room you want for decking, seating, landscaping, and lawn before settling on a size.

Try out the Thursday Pools Pool Selector Tool to compare models by yard size, preferred features, and planned use.

Ready to Find the Right Size?

The right pool size depends on how you will use it, what your yard can accommodate, and what your budget supports. A local Thursday Pools independent dealer can evaluate your property, confirm available models, and provide an installation estimate for your site.

Frequently Asked Questions About Fiberglass Pool Sizes

What is the most common fiberglass pool size?

Many residential fiberglass pools fall in the 13- to 16-foot-wide by 30- to 40-foot-long range because that size balances swim space, yard impact, and budget. Most families find that range strikes the right balance of swim space, yard impact, and budget. Plunge pool models in the 8′ x 16′ to 12′ x 26′ range have grown in popularity as homeowners prioritize lower-maintenance options and want to preserve outdoor living space beyond the pool itself.

What is the maximum size for a fiberglass pool?

Most fiberglass pools max out at 16 feet wide and 41 feet long. The 16-foot width limit comes from highway transportation regulations. Fiberglass pools ship as one-piece shells, and most states set 16 feet as the oversize load limit for road transport.

What is the smallest fiberglass pool size available?

The smallest fiberglass pools typically start around 8 to 10 feet wide and 14 to 16 feet long. Thursday Pools’ smallest models, including The Nest, The Nook, and The Drift, all measure 8’4″ x 16′ with a 4’8″ flat-bottom depth. These compact designs fit smaller backyards, courtyard spaces, and lots where a full-size pool is not practical.

How wide can a fiberglass pool be?

The practical maximum is 16 feet wide for a fiberglass pool. Because fiberglass pools ship as single-piece shells, they are subject to highway transportation width limits, which most states set at 16 feet.

What size fiberglass pool is best for a family of four?

For a typical family of four with kids, a pool in the 13.5′ x 35′ to 16′ x 40′ range tends to work well, with enough open swim area for games and laps while still fitting most residential lots. Flat-bottom models at 4’6″ depth, like the Lil Bob LX, Spirit, or Big Bob, are well-suited for families with younger children because swimmers can touch the bottom anywhere in the pool. For smaller yards or families who prioritize lounging over active swimming, a compact model like the Sea Turtle or Lil Bob can be a better fit.

Does pool size affect cost?

Yes, significantly. Longer and wider pools require more excavation, more backfill, more decking, and larger volumes of water to fill and maintain. As a general benchmark, plan on roughly $1,800 per foot of pool length for an installed fiberglass pool, though that figure varies based on location, site conditions, and the features added. A 16′ x 40′ pool will cost more to install and operate than a 12′ x 25′ model, both upfront and in ongoing heating, chemical, and water costs. A local dealer can give the most accurate estimate.

Can a fiberglass pool be too big for a backyard?

A pool can overpower a yard if the size does not match the available space and how the rest of the lot will be used. Beyond the pool shell, you need room for decking or patio, required setbacks from property lines and structures, and ideally some remaining yard for landscaping or outdoor living. A local Thursday Pools dealer can evaluate your property and recommend sizes that work within your specific lot.

What is a plunge pool, and how does it differ from a standard fiberglass pool?

A plunge pool is a smaller, shallower pool designed primarily for cooling off, relaxing, and light social use rather than lap swimming or active recreation. Plunge pools typically range from 8 to 12 feet wide and 14 to 26 feet long with flat-bottom depths around 4’6″ to 5’5″. They cost less to install and maintain than full-size pools and work well in smaller yards or as a complement to an existing outdoor living space.

What is the smallest fiberglass pool size?

Posted on October 14, 2022June 11, 2026 by kristin

Inground fiberglass pools create a unique aesthetic for the backyard, but homeowners with smaller backyards often think they don’t have room for the more elegant option. Fortunately, more options exist in small fiberglass pools than ever before. This post will answer “what is the smallest fiberglass pool size?” and other common questions for homeowners with smaller yards.

What is the smallest inground pool size?

Before answering the primary question of this blog post, let’s first give you some context. We generally categorize an inground pool as “small” if it measures 400 square feet or less. Depending on the dimensions, a small pool can be used for soaking, wading, swimming laps, or incorporating water features.

What is the smallest fiberglass pool size?

While pool manufacturers’ all develop different pool designs and sizes, Thursday Pools has several different small fiberglass pool designs, with the smallest being a wading pool that is nine by nine feet. Here are some of the smaller fiberglass pool designs (under 400 square feet) and their measurements:

Thursday Pools Pool Design	Dimensions	Square Feet
Wading Pool 1	9′ x 9′ 1’6″	81 ft2
Pearl	15′ x 25′ 3’9″	375 ft2
Sea Turtle	9.5′ x 19.5′ 4’6″	185.25 ft2
Aspen (also comes in four larger sizes)	12′ x 25′ 5’1″	300 ft2
Titus	12′ x 26′ 5’5″	312 ft2
Cathedral	14′ x 33′ 5′	462ft2
Lil Bob	13.5′ x 27.5′ 4’6″	371.25 ft2

What is a cocktail pool?

A cocktail pool is another term for a small pool that measures under 400 square feet and is approximately four feet deep. In fiberglass cocktail pools, you’ll find built-in beverage and wrap-around benches that provide places to soak and socialize. It’s a veritable cocktail party in the pool.

What is a plunge pool?

Plunge pools are also small pools but often deeper than cocktail pools. While cocktail pools are shallow and commonly used for relaxing, plunge pools are deep enough to allow for more activity, such as exercise and playing games. However, they may not offer wide-open swimming for a group of people. Plunge pools can also serve as a focal point for socializing.

What is the smallest pool you can swim laps in?

You don’t need an Olympic-size pool to swim laps. Even with a small pool, getting a few laps in is possible. Some small pools can be equipped with strong jets and pressure currents that create a flow of moving water. Activating these features allows you to swim “laps” without actually moving.

What to consider when buying a pool for a small backyard

Local building restrictions

Clearance restrictions may apply between the pool and your home and property lines. Zoning regulations and HOA restrictions can also impact pool size and layout options. An expert pool contractor will be familiar with federal restrictions and local requirements pertaining to your pool.

Amount of space

As a guideline for your own comfort, limit your pool size to not exceed 25 percent of your yard space. For example, a pool should not exceed 24 feet long by 12 feet wide for a lawn that measures 1,200 square feet or less.

Best pool for your needs

One of the most important considerations is how you plan to use your pool. A wading pool may be just what you need for a beautiful aesthetic and relaxation. If you are entertaining, you may want a deeper pool with plenty of seating or a flat-bottom pool for playing games. Another essential factor to consider is other backyard activities and the space required. Do you need open lawn space for play? How much patio space will you need?

The best small pool for you

Choosing a pool is personal. If you’re uncertain about which pool is best for your backyard, try out our pool selector tool as a starting point, or let us get you in touch with an independent dealer near you.

Small Fiberglass Pools: Sizes, Costs, and Shapes for Compact Backyards

Wanting a Pool in Your Small Yard?

Posted on April 26, 2022June 15, 2026 by krista

No matter the size of your yard, creating a staycation-worthy backyard is within reach. Small fiberglass pools fit compact spaces without sacrificing style, comfort, or function. They offer a low-maintenance, budget-friendly solution with options like plunge pools and other ultra-compact designs, making it easier than ever to add a beautiful, refreshing pool to even the smallest backyard.

Is a Small Pool Worth It?

Absolutely! Small pools offer a smart, stylish solution for homeowners who want all the benefits of a pool without overwhelming their outdoor space.

With a compact design, you’ll have more room for other backyard features—like a lounge area, firepit, or outdoor kitchen—so you can truly enjoy a well-rounded outdoor living space. Smaller pools also mean easier upkeep, lower chemical use, and reduced energy costs, making maintenance a breeze.

And when it comes to your budget, going smaller can free up funds for extras like built-in seating, a tanning ledge, or an automatic pool cover. Best of all, small fiberglass pools come in a variety of layouts to suit how you plan to use your space—whether that’s relaxing, exercising, or entertaining a few close friends.

What Are Some Small Pool Options?

Before exploring specific designs, it’s important to understand the three main types of inground pools. Each offers unique benefits, and the best choice depends on your space, budget, timeline, and how involved you want to be with long-term upkeep.

Concrete (Gunite) Pools

Install Time: Approximately 3 to 6 months
Maintenance: Around 4 to 5 hours per week
Cost: $50,000 to $120,000+
Customization: Fully customizable in shape, size, and features

Concrete pools are known for their design flexibility and durability. If you have a very specific vision for your pool’s shape or want to maximize every inch of your yard, concrete offers the freedom to create a one-of-a-kind layout. Keep in mind, though, they take the longest to install and tend to require more hands-on maintenance and chemical use over time.

Vinyl Liner Pools

Install Time: Approximately 4 to 8 weeks
Maintenance: About 2 to 3 hours per week
Cost: $25,000 to $65,000
Customization: Custom sizes and shapes available

Vinyl liner pools are more affordable upfront, and builders can tailor them to fit many different backyard configurations. They’re a practical option if you want some customization without the higher price tag of concrete. However, the vinyl liner will eventually need replacement, which adds to long-term upkeep and costs.

Fiberglass Pools

Install Time: About 3 weeks
Maintenance: Around 1 hour per week—or less
Cost: $30,000 to $85,000
Customization: Limited to pre-designed shapes and sizes

Fiberglass pools come pre-formed from factory molds, which speeds up installation and simplifies maintenance. While you won’t have as much design flexibility, many models are available in compact sizes with built-in seating, tanning ledges, and other features that make the most of smaller spaces. The smooth, non-porous surface also resists algae growth, meaning fewer chemicals and less time cleaning.

Each pool type brings something different to the table—whether it’s complete customization, affordability, or ease of care. If you’re working with a smaller yard, all three can be viable options depending on your goals and preferences. Talking with a pool professional can help you weigh the trade-offs and find the best fit for your backyard.

Small Backyard Pool Ideas

Whether you’re looking for a true plunge pool or just a space-saving pool design, there are plenty of options for full-size enjoyment in smaller spaces. Below are some of Thursday Pools’ most popular compact models, each offering unique features to fit your lifestyle and yard size.

Plunge Pool Options

These pools are deeper than they are expansive, perfect for cooling off, standing, soaking, or even light exercise. A plunge pool is ideal for homeowners who want the experience of a luxurious inground pool without the footprint of a full-size one.

Sea Turtle

Size: 9.5′ x 19.5′ | Depth: 4′6″

The Sea Turtle is a true plunge-style pool with a flat bottom and generous bench seating on both sides. It’s perfect for standing, stretching, or simply soaking on hot days—all while fitting comfortably into a smaller yard.

The Nook

Size: 8′4″ x 16′ | Depth: 4′8″

The Nook offers a balanced blend of comfort and practicality. With a built-in bench and consistent standing depth throughout, it’s ideal for water aerobics, casual conversation, or simply unwinding. Built-in entry steps and a non-skid surface make it a safe and easy-to-maintain plunge pool.

The Nest

Size: 8′4″ x 16′ | Depth: 4′8″

Petite and purposeful, The Nest is a compact plunge pool for relaxing, cooling off, and casual soaking. It features a flat bottom, wide entry steps, and is auto-cover ready—making it a stylish solution for tight spaces.

Other Compact Pool Options

These pools aren’t plunge-style, but still work well in smaller yards. They offer more swimming space and family-friendly layouts, often with added seating or space for games.

Lil Bob

Size: 13.5′ x 27.5′ | Depth: 4′6″

Lil Bob is all about flexibility. With wrap-around bench seating and a flat, even depth, it’s great for light swimming, games like water volleyball, or simply lounging with friends. It’s a compact design with room to move.

Titus

Sizes:

12′ x 26′ | Depth: 5′5″
14′ x 33′ | Depth: 5′10″

Titus offers a larger swim area while still fitting in smaller backyards. Its rounded shape and built-in seating create a comfortable space for both activity and rest. It’s a good choice if you want a pool that supports swimming as well as relaxation.

Wading Pool

Sizes:

9′ x 9′ | Depth: 1′6″
11′9″ x 13′9″ | Depth: 1′6″

Great as a stand-alone feature or a pool add-on, the Wading Pool is ideal for small children, a quick dip, or cooling off without getting fully in. It offers shallow, safe fun in a small footprint.

Wet Deck

Size: 8’1” x 14′ | Depth: 1′

The Wet Deck is a shallow splash zone perfect for sunbathing or letting young children play. Use it alongside another pool or on its own as a refreshing, low-maintenance backyard water feature.

Ready to Make a Small-Pool Splash?

Small yard? No problem—smart design and the right pool can help you make a big splash anywhere. Whether you prefer a traditional fiberglass pool, a plunge pool, or a more compact design, there’s a perfect option to fit your space, style, and budget. Connect with a Thursday Pools dealer to explore what’s possible, check out the Pool Cost Calculator for a quick estimate, and browse our Idea Book for extra inspiration.

Thursday Pools Rectangle Fiberglass Pool Shell Options by Size, Depth, and Features

Posted on April 18, 2022June 19, 2026 by krista

Rectangle fiberglass pools come in more variety than many buyers expect. The shape is consistent, with clean lines, straight walls, and sharp corners, but size, depth, and built-in features vary by model. The right shell depends on your yard size, how you plan to swim, and whether you want lounging space, sport depth, a beach entry, a spa, or a deep end.

Compact Rectangle Fiberglass Pool Shells

These models are part of Thursday Pools’ Plunge Pool Series, built for smaller backyards, courtyard spaces, and homeowners who want a genuine pool experience in a compact footprint. All three share the same 8’4″ x 16′ rectangle shell at 4’8″ flat-bottom depth. Sea Turtle offers a slightly larger 9.5′ x 19.5′ rectangle shell. The smallest sizes of Aspen and Goliath are also part of the Plunge Pool Series with 12’ x 25’ rectangle shells.

The Drift

The Drift is designed for lounging as much as swimming. Its full-length wraparound bench supports social gatherings, cool evening dips, and extended relaxation.

A full-length wraparound bench creates a comfortable seating zone without giving up the swim area.
Built-in steps and a non-skid surface throughout provide safe, easy entry and exit for all ages.

The Nest

The Nest maximizes open water in the smallest Thursday Pools rectangle shell. Full-width entry steps and a clean, unobstructed swim area make it the most activity-forward of the three 8’4” x 16’ options.

Full-width entry steps provide a wide, easy point of entry.
The open interior layout keeps the swim area clear for exercise and play.

The Nook

The Nook brings minimalist design and integrated seating to the compact rectangle format. It works well as a private courtyard pool or as a compact water feature beside a patio, outdoor kitchen, or seating area.

Integrated wraparound bench seating lines both sides of the pool.
Built-in steps and a non-skid flat-bottom surface throughout.

Sea Turtle

Sea Turtle steps up to a 9.5′ x 19.5′ rectangle shell at 4’6″ flat-bottom depth. It suits smaller yards that need a bit more swim room than the 8’4″ x 16′ models provide, and adds a swim-jet-ready design for light exercise.

A 4’6” flat-bottom depth throughout allows comfortable standing, socializing, and light activity.
Wraparound benches flank the entry steps, creating a relaxed conversation area.
Swim-jet-system-ready design makes it easy to add a resistance swim system like Badu®.

Sport and Social Rectangle Fiberglass Pool Shells

These models share a flat-bottom sport-depth design, making them well-suited for water games, family play, and active use. All maintain a consistent standing depth of 4’6″ to 4’8″ throughout the pool.

Lil Bob

Lil Bob is built around a 13.5′ x 27.5′ flat-bottom shell at 4’6″ throughout. It’s a strong choice for families who want a sport-focused pool that keeps kids and adults in the game together.

Full-width ergonomic steps make it easy for everyone to enter and exit the pool.
A standing-depth, flat-bottom design makes Lil Bob a great size for water volleyball.
Two facing benches, each 12 feet long and 18 inches deep, run down both sides of the pool, leaving a clear open swim area in the center.

Lil Bob LX

Lil Bob LX extends the Bob family formula to a 13.5′ x 35.5′ shell with a 4’6” sport depth, adding a tanning ledge and wading area while keeping the flat-bottom sport depth.

A tanning ledge accommodates two lounger chairs while leaving room to enter and exit the pool.
A wading area just past the tanning ledge gives younger swimmers a comfortable shallow zone.
Generous wraparound benches run along both sides of the open swim area.

Big Bob

Big Bob is the largest pool in the Bob family. It’s a 16′ x 40′ flat-bottom rectangle with a uniform 4’6″ depth throughout. It gives families who love the Bob design more of everything: more bench space, more open water, and more room for games and laps.

Extra-long wraparound benches, 12 feet long and 18 inches deep, run down both sides of the pool.
Wide walk-in steps make getting in and out easy for swimmers of every age.
The open 16′ x 40′ swim and play area accommodates lap swimming, water volleyball, basketball, and active family games.

Spirit

Spirit runs 13.5′ x 40′ at a flat-bottom depth of 4’6″, giving it one of the longest open swim lanes in the sport-depth rectangle category. Spirit is best for homeowners who want lap-friendly length while keeping the entire pool at a comfortable standing depth.

The court-sized flat-bottom design gives swimmers and players plenty of room.
Extended bench seating and full-length steps at both ends of the pool create multiple entry and social zones.

Mack Daddy

The Mack Daddy is a 16′ x 36′ flat-bottom rectangle at 4’8″ depth that packs four distinct pool zones into one shell. It’s the only rectangle design in the Thursday Pools lineup with a built-in integrated spa.

A built-in tanning ledge accommodates two loungers with room to enter and exit the pool.
An integrated spa with a tranquil spillway adds a dedicated relaxation zone.
Wraparound bench seating adds a third area for sitting and soaking.
A uniform 4’8″ flat-bottom depth keeps the swim lane accessible for games, exercise, and active family use.

Magnate

The Magnate shares the 16′ x 36′ flat-bottom shell at 4’8″ depth with the Mack Daddy but trades the spa for a more streamlined layout built around an oversized sun shelf.

A built-in sun shelf accommodates tanning in lounger chairs.
Double-entry wraparound benches and step-in stairs form two conversation areas and two points of entry.
A wide-open swim lane runs the length of the pool for laps, exercise, and active use.

Deep and Feature-Rich Rectangle Fiberglass Pool Shells

These models offer deeper depth profiles, tanning ledges, swim-out benches, courtesy ledges, and beach entries. They suit buyers who want more traditional swimming depth alongside built-in comfort features.

Aspen

The Aspen is one of Thursday Pools’ most popular rectangle designs, available in five sizes ranging from 12′ x 25′ to 16′ x 40′. It pairs a signature 12-inch tanning ledge with a deep-end design and multiple built-in comfort zones.

A 12-inch deep tanning ledge comfortably fits two lounger chairs with room to enter and exit the pool.
Curved steps stretch across the width of the pool for wide, easy entry.
An extended bench near the steps gives swimmers a place to rest and socialize.
Deep-end swim-outs offer a second exit point and a comfortable perch in the deep end.
The wide-open swim lane runs down the center of the pool for laps and active use.

Grace Beach Entry

Grace Beach Entry brings a zero-entry, beach-style entrance to a rectangle shell, giving swimmers, children, and pets a gradual way into the water. The patented design (US 10,472,839) is available in three sizes from 14′ x 36′ to 16′ x 40′.

A gently sloping beach entry makes getting in and out easy for swimmers and pets alike, and fits two lounger chairs in the shallow zone.
A wading area just past the entry works well for young children and doubles as a cool-off zone.
An extended bench runs along the pool for relaxing and socializing.
Dual deep-end swim-outs provide an additional exit point and resting zone.
An open swim area anchors the middle of the pool for laps and active use.

Goliath

The Goliath is available in six sizes from 12′ x 25′ to 16′ x 41′, with depth profiles ranging from 5’4″ to 6’8″. It suits buyers who want a serious deep-end swim experience alongside strong entertaining capacity.

A wide-open swim lane runs down the center of the pool for laps and floating.
Bench seating flanks the entry steps for a comfortable social zone.
Two sets of curved steps in the shallow end and swim-out ledges in the deep end provide multiple entry and exit points.

Monolith

Monolith is Thursday Pools’ deepest rectangle pool model. Its 16′ x 40′ shell reaches 8’6″ at the deep end and includes a flat-bottom shallow end for play. Because diving safety depends on pool dimensions, equipment, installation, and applicable standards, homeowners should consult their dealer, equipment manufacturer, and local requirements before considering any diving or slide use.

The 8’6″ deep end qualifies the Monolith as a Type 1 diving pool under applicable standards.
A large flat-bottomed shallow end leaves room for pool games and active play.
Angled steps make it easy and safe to enter and exit.
A shallow-end bench and dual deep-end benches give swimmers options for resting and socializing at both ends of the pool.

Thursday Pools strongly recommends that diving boards and slides not be installed or used with its pools because of the inherent dangers associated with diving boards and slides in residential pools, including severe injury or death.

Thursday Pools does not manufacture or sell diving boards or slides.

If a homeowner chooses to install or use a diving board or slide despite this warning, the homeowner assumes all related risks and is responsible for confirming that the pool, equipment, installation, and use comply with manufacturer specifications, applicable ANSI/NSPI, ANSI/APSP, ANSI/APSP/ICC standards, and all applicable laws, rules, and regulations.

Find the Fiberglass Pool That Fits Your Yard and Lifestyle

Not sure which rectangle fiberglass pool shell is right for your yard? Use the Pool Selector Tool to compare rectangle fiberglass pool shells by yard size, intended use, and desired features. For site-specific guidance, contact a Thursday Pools dealer near you for a yard evaluation and installation estimate.

Frequently Asked Questions About Rectangle Fiberglass Pool Shells

What is a fiberglass pool shell?

A fiberglass pool shell is a pre-molded, single-piece pool structure manufactured from layers of fiberglass and resin in a controlled factory environment. The finished shell is transported to your property, set into the excavated hole, connected to plumbing, and backfilled. Because it arrives as a complete unit, installation is significantly faster than concrete and avoids the on-site curing and finishing work associated with other pool types.

What rectangle fiberglass pool shells does Thursday Pools offer?

Thursday Pools offers a wide range of rectangle fiberglass pool shell designs, including The Drift, The Nest, The Nook, Sea Turtle, Lil Bob, Lil Bob LX, Big Bob, Spirit, Mack Daddy, Magnate, Aspen, Grace Beach Entry, Goliath, and Monolith.

What is the best rectangle fiberglass pool for lap swimming?

Any rectangle pool with a long, unobstructed swim lane works well for lap swimming, but the right choice depends on how seriously you swim. Spirit (13.5′ x 40′), Big Bob (16′ x 40′), Aspen (up to 16′ x 40′), Goliath (up to 16′ x 41′), and Monolith (16′ x 40′) all give you meaningful length. If you want a deep-water feel for laps, Aspen, Goliath, and Monolith offer deeper profiles. If standing depth and open swim area matter more, Spirit and Big Bob are the flat-bottom options at that length.

What is the best rectangle fiberglass pool shell for families with young children?

Flat-bottom pools at 4’6″ to 4’8″ depth are often a strong choice for active family use because the depth stays consistent from end to end. Depending on swimmer height, they may be easier to use for games, supervision, and shared play than pools with a steep depth transition.

What is the difference between flat-bottom and deep-end rectangle fiberglass pools?

Flat-bottom pools hold a consistent standing depth from end to end, typically 4’6″ to 4’8″. That uniform depth suits water sports, family play, water aerobics, and any activity where swimmers of varying heights need to touch the bottom. Deep-end pools slope from a shallow entry zone to a deeper swim area, usually 5’1″ to 6’8″ depending on the model. Deep-end designs offer more vertical swim space and a more traditional pool feel. Monolith is the deepest rectangle pool shell option, reaching 8’6”.

Can I get a small rectangle fiberglass pool shell?

Yes. Thursday Pools’ smallest rectangle shells include The Drift, The Nest, and The Nook, all measuring 8’4″ x 16′ at 4’8″ flat-bottom depth. Sea Turtle steps up to 9.5′ x 19.5′. Buyers who want a larger compact rectangle shell can also compare the smallest Aspen and Goliath sizes at 12′ x 25′.

What features do rectangle fiberglass pool shells come with?

Depending on the model, Thursday Pools ‘ rectangular fiberglass pool shells may include tanning ledges, integrated spas, wading areas, wraparound bench seating, swim-out benches, courtesy ledges, beach entry zones, and auto-cover readiness.

How long does a fiberglass pool shell last?

Fiberglass pool shells are known for long service life when properly installed and maintained. The gel coat surface is designed to resist algae and mineral buildup, and the single-piece construction avoids liner seams and concrete replastering. With proper water chemistry and routine care, a quality fiberglass pool shell can last for decades. Consult your Thursday Pools dealer and review the warranty for specific coverage details.

What is the Maximum Depth of a Fiberglass Pool?

Posted on April 12, 2022June 15, 2026 by krista

A couple of frequently asked questions we get as a fiberglass pool manufacturer involve pool depth. In that regard, people often want to know, “Can a fiberglass pool have a deep end?” and, “What is the maximum depth of a fiberglass pool?” This post will answer these questions and more about fiberglass pools.

Can a fiberglass pool have a deep end? If so, how deep is the deep end of a pool?

Many fiberglass pools have a deep end. However, most designs that are manufactured today aren’t diving depth. The typical fiberglass pool has a deep end of five and one-half feet, but pool depth varies by design. Because many pool-goers spend most of their time in areas of the pool where they can stand with their head above the water, having too deep of a deep end could be perceived as wasted space for some.

How deep does a pool need to be for a diving board?

There are many different specifications for the five types of diving pools, but the required pool depth is typically eight-feet or more for the diving well. Pools with diving boards are approximately one-third diving well, one-third hopper area (slope between shallow and deep ends), and one-third shallow area. Because many people spend most of their time where they can touch the bottom, thoughtfully consider a pool with a diving board. Here are a few reasons you don’t see deep ends in pools that much anymore:

Pool Safety. A diving board requires constant supervision to ensure safe use, which may be more effort than a homeowner wants to put in. Plus, diving boards are sometimes too tempting for inexperienced swimmers.

Higher insurance premiums. Many insurers will require a liability rider or additional coverage on your homeowner’s policy if you have a diving board.

Alternative activities. The presence of a diving well or deep-end can cancel out some of the other in-pool activities. A flat-bottom pool design is better suited to splash volleyball, water basketball, and other pool games.

Stiffness. Due to accidents and liability concerns, diving boards have evolved into stiffer designs. The more rigid design makes them safer but maybe not quite as fun.

Large dimensions are required. If you’re going to have a diving board, you’ll need a large pool, especially if you want to enjoy other activities.

That all said, preferences are preferences, and if you want a diving board, Thursday Pools does offer a Type 1 diving pool design. At 8′ 6″ deep, the Monolith, a 40′ x 16′ rectangular pool design, exceeds the depth of our other large pools by almost two feet. If you are a diving enthusiast, take a look at the Monolith Wet Tour to understand what a deep fiberglass pool looks like in use.

(Note: *Thursday Pools strongly recommends that diving boards and slides not be installed or used with its pools, given the inherent dangers associated with diving boards and slides in residential pools. These dangers include brain, spinal cord and other severe permanent injuries, and death. For that reason, Thursday Pools does not manufacture or sell diving boards or slides. If, despite this warning and recommendation, the owner decides to install or use a diving board or slide, the owner assumes all risks inherent with a diving board or slide, and Thursday Pools further warns that diving boards and slides require minimum depths and distances and must be installed and used in strict compliance with the equipment manufacturer‘s specifications and ANSI/NSPI, ANSI/APSP, and ANSI/APSP/ICC standards, as well as in compliance with all applicable laws, rules and regulations. The owner is responsible for making sure the pool is appropriate for diving boards and slides and otherwise meets all standards and laws for diving pools, and the owner must consult the diving board or slide manufacturer and/or installer as to the appropriateness of the pool for the diving board or slide and that its installation, location and use meet all standards and laws for diving and slide pools.)

What is the maximum depth of a fiberglass pool?

Diving board dilemma aside, some people still want to know the maximum depth of a fiberglass pool. This will vary by manufacturer. It is true that smaller pools tend to accommodate less depth than larger, longer ones. Still, there are pools of various depths out there that can fit your lifestyle. Four feet deep pools are perfectly suitable for underwater swimming, so consider how you will use your pool and other built-in features that would make your pool time memorable. Are you looking for a deep pool, or would a large pool that is not a diving pool be just as or more your style? Take a look at the following large pool designs to see why they are so popular among pool buyers:

The Grace Beach Entry (Patent US 10,472,839) comes in a maximum depth of 5’10″—not a diving depth—but it’s a homeowner favorite because it brings a resort aesthetic and is functionally fantastic. The easy entry and exit accommodate swimmers of all ages (and pets). The gentle slope lets you stay cool in the water while soaking up the sun, and it provides a great place for little ones to splash around in the shallow waters.

The aptly named Goliath is a large pool with a maximum depth of 6’8″. It features convenient stairs and comfortable seating ledges strategically placed to create an open swim lane right down the center of the pool. Pool users who like to swim and those who like to lounge find this to be a great place to do both at the same time.

A best-seller, the Aspen, comes in a variety of sizes. The largest is 16’x40′ and has a maximum depth of 5’10”. While it boasts an open swim area, Aspen also has a large tanning ledge with room for a couple of loungers while leaving plenty of space for swimmers to enter and exit the pool. It is an all-around favorite pool design because it accommodates almost any lifestyle.

The Spirit, Lil Bob, and Lil Bob LX are larger fiberglass pools with a 4’6″ depth. While they provide ample room for swimming, these designs also accommodate pool volleyball and socializing more readily than a variable depth pool.

If you are now second-guessing whether you need a deep pool, the best advice we could give is to talk to an independent pool dealer near you. They can assess your outdoor space and pool desires and help you determine what’s right for you.

How Much Does a Small Inground Pool Cost?

Posted on December 15, 2021June 15, 2026 by krista

Understanding how much a small inground pool costs is an important first step when planning for a pool in a compact backyard. Smaller pools offer a practical solution for limited spaces, delivering style, function, and enjoyment without the size or expense of a full-size pool. With the right approach, they can enhance your outdoor space while fitting your budget. Whether you’re dreaming of a quiet retreat or a stylish entertaining spot, a small inground pool can transform even the smallest or simplest backyard into something extraordinary.

Why Choose a Small Inground Pool?

Small inground pools offer numerous benefits for homeowners with smaller yards, families, or those seeking an efficient and stylish pool solution. Thoughtful and creative designs enable these pools to maximize limited outdoor spaces while maintaining sophistication and practicality. Their streamlined size contributes to easier maintenance, reduced water and chemical use, and lower long-term ownership costs. Despite their compact dimensions, these pools do not compromise on features or visual appeal. With careful planning, a small inground pool can become a striking focal point of your backyard, providing a perfect balance of relaxation, recreation, and fitness opportunities. For example, flat-bottom models are particularly well-suited for activities like water aerobics or integrating swim jet systems, combining leisure and exercise in a versatile setting.

How Much Does a Small Inground Vinyl Liner Pool Cost?

As of 2025, HomeGuide’s data indicates that the average cost of a vinyl liner inground pool ranges from $16,600 to $49,000 for pools between 200 and 400 square feet, depending on design and features. This price covers installation, excavation, materials, and labor, but excludes additional expenses like decking, landscaping, and optional upgrades such as lighting or heating. It’s also important to consider that vinyl liners typically need replacement every 5 to 15 years, at a cost ranging from $2,000 to $7,500, which adds to the long-term ownership expenses.

How Much Does a Small Inground Gunite (Concrete) Pool Cost?

Gunite (concrete) pools for smaller yards, typically ranging from 200 to 400 square feet, generally cost between $20,000 and $84,000, according to Renotag’s pricing data, depending on the complexity of the design and regional variables. It’s also important to factor in ongoing maintenance costs such as resurfacing, acid washing, and regular upkeep, which add to the overall long-term expense. Taking all these considerations into account will help ensure a comprehensive budget for both installation and long-term care.

How Much Does a Small Inground Fiberglass Pool Cost?

Inground fiberglass pool costs typically begin around an average $2,000 per foot of pool length. For example, the Sea Turtle model, which measures 19.5 feet long, may cost approximately $39,000, while the 27.5-foot-long Lil Bob design can average $55,000 based on this calculation. These estimates generally cover the pool itself but exclude additional expenses such as decking, spa add-ons, and ongoing maintenance.

Unlike vinyl liner or gunite pools, manufacturers prefabricate fiberglass pools in a controlled factory environment and deliver them ready for installation, reducing complexity and installation costs. While customization options are more limited, many features come built into the design, minimizing the need for costly add-ons. Although fiberglass pools generally require less maintenance than other types, regular care—including cleaning, chemical treatments, and electricity—remains essential and should be in your budget.

Plunge Pools

Plunge pools offer a peaceful, space-saving retreat ideal for repose, light exercise, and socializing, with several popular designs that bring comfort and style to smaller backyards.

The Nook
Compact and serene, The Nook measures 8 feet, 4 inches, wide by 16 feet long and features a consistent flat-bottom surface. It’s ideal for lounging or cooling off on warm days. Its simple yet practical design makes it easy to maintain and a perfect escape for calm moments.

The Pearl
With a wraparound bench and built-in tanning ledge, the Pearl brings a spa-like experience to your backyard. Measuring 15 feet wide by 25 feet long, it’s designed for elegant ease and effortless conversation. The graceful curves of this pool create a welcoming atmosphere for entertaining guests or unwinding solo.

Sea Turtle
The Sea Turtle combines style with usability, measuring 9.5 feet wide by 19.5 feet long and featuring generous bench seating and wide entry steps. It’s great for socializing or adding a swim jet for light exercise, and the design adds a touch of sophistication while maximizing comfort.

The Nest
Minimalist in design yet big on comfort, The Nest measures 16 feet long by 8 feet, 4 inches, wide with a flat-bottom surface. It’s easy to navigate, safe for all ages, and ideal for socializing or light water aerobics. Auto-cover compatibility makes it a smart, versatile choice for any backyard.

Other Small Pool Options

These small pool designs provide more room to move while still maintaining a compact footprint. They’re ideal for families, entertaining, or light exercise.

Lil Bob
Designed with versatility in mind, Lil Bob measures 13.5 feet wide by 27.5 feet long and has full-length benches on both sides. The center swim lane supports low-impact fitness and fun. Its practical layout offers ample space for both relaxation and activity, balancing usability with style.

Titus
Titus brings a touch of playful sophistication with its flowing, freeform shape. At 12 feet wide by 26 feet long, it’s perfect for water aerobics, casual swimming, or lounging on the built-in beverage bench. The sinuous design softens your backyard space, making it feel inviting and dynamic.

Aspen (Small Size)
Aspen offers spa-inspired comfort in a space-conscious design. The smallest model measures 12 feet wide by 25 feet long, featuring a spacious tanning ledge, comfortable bench seating, and a courtesy ledge around the deep end for standing and socializing. Its graceful form and thoughtful details provide a serene retreat that enhances any outdoor living area.

Designed for Small Spaces, Built for Big Enjoyment

Whether you’re dreaming of a private plunge pool or a compact design with room to move, Thursday Pools’ small fiberglass models offer smart design, lasting quality, and low-maintenance appeal perfect for maximizing your outdoor space. While the pricing estimates above provide a helpful starting point, connect with a local pool builder to get an accurate quote based on your specific needs. You can also explore options with the free Thursday Pools Pool Cost Calculator. Whichever model you choose, a small fiberglass pool can turn your backyard into a personal retreat.

Fiberglass Pools: Everything You Need To Know Before You Buy