How Much Does a Fiberglass Pool Cost in Illinois?

Based on a 2026 survey of independent fiberglass pool builders in the Thursday Pools dealer network, a standard fiberglass pool installation in Illinois averages $73,333 for a small pool, $88,611 for a medium pool, and $102,500 for a large pool. Your final cost will depend on details like pool size, yard conditions, local permit requirements, and the optional upgrades you choose.

Illinois’ diverse geography creates real variation in pool installation costs across the state. In metropolitan areas like Chicago and its suburbs, local permit requirements, zoning regulations, and dense neighborhoods can add complexity to project costs. Varied ground conditions throughout Illinois, from clay-heavy soils in many regions to rocky conditions in certain areas, can affect excavation requirements and installation timelines. Urban areas often present limited yard access challenges, while rural properties typically offer more straightforward installation conditions.

Optional features such as pool heaters, automatic covers, and upgraded decking materials add to your total investment but also extend your swimming season and enhance the overall value you get from Illinois’ warm summers. A local independent Thursday Pools dealer can help you decide which additions fit your property and your budget.

 

What is the Average Cost of a Fiberglass Pool Installation in Illinois?

Thursday Pools surveys its network of independent dealers across the country each year to track real-world installation costs. The figures below reflect current market conditions in Illinois based on our 2026 survey of 19 independent dealers.

Based on the 2026 survey of independent Thursday Pools dealers in Illinois, installed fiberglass pool costs average $73,333 for small pools, $88,611 for medium pools, and $102,500 for large pools.

AVERAGE ILLINOIS FIBERGLASS POOL INSTALLATION BY SIZE
Pool Type	Small Fiberglass Pools	Medium Fiberglass Pools	Large Fiberglass Pools
Size Range	Up to 26 feet long or 400 square feet	26 to 34 feet long or 400 to 600 square feet	35 feet and longer or 600+ square feet
Average Cost	$73,333	$88,611	$102,500

 

What Does a Standard Fiberglass Pool Installation in Illinois Include?

Most Illinois dealers include the following in a base package: the pool shell, excavation, basic pump and filtration equipment, plumbing, basic electrical, permits, a single pool light, initial water fill, dirt hauling, concrete decking approximately 3 feet around the pool, delivery, and labor. What individual dealers include can vary, so always compare proposals carefully. Expanded decking, fencing, landscaping, pool covers, and optional features typically cost extra.

Contact a nearby Thursday Pools dealer for a custom quote and to learn about financing options for your Illinois pool installation.

What Do Popular Fiberglass Pool Models Cost Installed in Illinois?

ASPEN (12′ x 25′)

Aspen is a versatile choice for Illinois homeowners looking for a compact yet elegant fiberglass pool that fits well in smaller suburban backyards. At 25 feet in length, this rectangular model is perfect for urban areas in Chicago, Springfield, or Rockford. The pool features built-in bench seating and offers a refreshing retreat from Illinois’ summer heat without the maintenance demands of a full-sized pool.

Based on 2026 feedback from Thursday Pools dealers across Illinois, the average installed cost for a small fiberglass pool like Aspen or other designs less than 26 feet long and 400 square feet is $73,333.

 

SUN DAY (15′ x 30′)

Sun Day is a spacious fiberglass pool that accommodates active families throughout Illinois. Its graceful freeform shape provides generous swimming space, perfect for exercise or play during the state’s warm summer months. The pool features a large landing pad with built-in entry stairs, wraparound benches, and a separate swim-out sun shelf for relaxation and socializing.

According to 2026 survey responses from independent Thursday Pools dealers in Illinois, the average installed cost for a medium-sized fiberglass pool like the Sun Day is $88,611.

 

MACK DADDY (16′ x 36′)

Mack Daddy brings luxury and functionality to Illinois properties seeking elegance and comprehensive aquatic features. This premium design is Thursday Pools’ first to feature a fully integrated spa with spillway, in addition to a spacious tanning ledge, conversation area with wraparound benches, wide entry steps, and an open swim lane with uniform flat-bottom depth.

The Mack Daddy and similar large models are well-suited for suburban or rural Illinois properties with room for an expansive yet stylish pool complex. The average cost for a standard installation of a large fiberglass pool like Mack Daddy in Illinois is $102,500.

 

What Yard Conditions Affect Fiberglass Pool Installation Costs in Illinois?

Illinois’ varied terrain and soil conditions can affect installation costs significantly, sometimes more than homeowners expect. Before breaking ground, a professional installer will assess your site for conditions that may require extra preparation.

Soil Type

Illinois’ diverse geology creates distinct soil challenges across the state. Many areas throughout Illinois have clay-heavy soils that can create drainage concerns and require special handling during installation. Rocky soil conditions, while less common, appear in certain areas and often require specialized excavation equipment and additional labor costs. Sandy soils are found in specific regions and may need additional stabilization measures. A pre-installation site assessment can identify what your specific soil requires before the project begins.

Slope and Grade

Many Illinois properties have slopes that require grading, retaining walls, or other leveling work before excavation and installation can proceed. A relatively flat, level yard typically keeps installation more straightforward and predictable.

Backyard Access

Wide, open access makes a fiberglass pool installation more efficient. Properties with narrow gates, tight side yards, or other access constraints may need specialty equipment, additional labor, or crane service to move the pool shell into position. In established neighborhoods, particularly in urban areas like Chicago, Peoria, or suburban developments, access limitations can affect both the timeline and the cost of installation.

 

AVERAGE ADDITIONAL YARD-RELATED EXPENSES IN ILLINOIS
Excavating Sandy Soil	$3,953
Excavating Clay-Heavy Soil	$1,947
Excavating Rocky Soil	$5,035
Above-Average Slope Requiring Extra Grading	$4,347
Limited Yard Access	$5,994

 

Based on Thursday Pools’ 2026 independent dealer survey, site-condition upcharges range from about $1,947 for clay-heavy soil to $5,994 for limited yard access.

 

What Are Illinois’ Swimming Pool Fence Requirements?

Pool barrier requirements in Illinois are set by local municipalities and counties. Many Illinois jurisdictions regulate pool enclosures through local building ordinances that vary by location. Common baseline requirements in Illinois municipalities include:

• Barriers tall enough to prevent unauthorized access
• Self-closing and self-latching gates
• No openings a child could pass through

Always check swimming pool barrier and safety regulations for your specific local county or municipality before installation. Local building departments can provide current requirements and permit information for your area. Chicago requires barriers at least 5 feet high with self-closing, self-latching gates for pools deeper than 4 feet.

For a 300-linear-foot basic pool fence, Illinois dealers estimate an average cost of $10,913. Final pricing varies by material, height, gate requirements, terrain, and local code compliance.

 

How Much Do Fiberglass Pool Upgrades Cost in Illinois?

Optional features can expand what your pool does and extend your swimming season throughout Illinois’ climate. The right upgrades enhance comfort, convenience, and safety while maximizing your investment. The averages below come from Thursday Pools’ 2026 dealer survey in Illinois.

Water Quality and System Controls

Pool Heater

• Average Cost in Illinois: $6,047
• Extend your swim season by keeping the water at a comfortable temperature during cooler months, maximizing your investment in Illinois’ climate.

UV Filter System

• Average Cost in Illinois: $3,473
• A UV system passes pool water through an ultraviolet light chamber that destroys bacteria, algae, and chloramines so chlorine works more efficiently and you need less of it to maintain safe, sanitary water.

Pool Automation and Smart Control System

• Average Cost in Illinois: $5,513
• Manage temperature, lighting, and filtration from a smartphone or tablet.

 

Patio and Hardscape

Poured Concrete Patio (Approx. 1,200 sq. ft.)

• Average Cost in Illinois: $12,467
• A durable, low-maintenance decking option that handles Illinois’ freeze-thaw cycles and seasonal weather changes.

Paver Patio (Approx. 1,200 sq. ft.)

• Average Cost in Illinois: $14,860
• Available in a range of materials, from concrete pavers to natural stone, with a more finished aesthetic than poured concrete.

 

Safety and Covers

Fence (300 Linear ft.)

• Average Cost in Illinois: $10,913
• Final cost varies by material choices, total fence length, and local code requirements.

Non-Automatic Safety Pool Cover

• Average Cost in Illinois: $6,487
• A manual option for securing the pool and keeping debris out between uses.

Automatic Pool Cover

• Average Cost in Illinois: $15,760
• One-touch operation to protect the pool, retain heat, and reduce evaporation. Many Illinois homeowners prioritize this upgrade for safety and convenience.

 

Water Features

Deck Jets

• Average Cost in Illinois: $2,667 per jet
• Arc water from the coping into the pool, adding visual movement and ambient sound to the pool area.

Bubblers

• Average Cost in Illinois: $4,680 per bubbler
• On a tanning ledge or beach entry, create movement and the sounds of a babbling brook in shallow pool water.

Cascade or Waterfall

• Average Cost in Illinois: $6,447
• Add a flowing water element and natural sound to the pool environment.

 

Cleaning and Maintenance

Automatic Pool Cleaning and Vacuuming System

• Average Cost in Illinois: $4,860
• Keep the pool floor and walls clean with minimal manual effort.

 

Lighting and Tile

LED Pool Lights

• Average Cost in Illinois: $2,549 per light
• Adds ambiance and visibility for evening and nighttime use.

Specialty Waterline Tile

• Average Cost in Illinois: $4,960
• Installed along the waterline for a custom, finished appearance at the pool edge.

 

Landscaping and Extras

Surrounding Landscaping

• Average Cost in Illinois: $6,040
• Includes decorative rocks, plantings, trees, bushes, flower beds, and similar elements that connect the pool to the rest of the yard.

Add-On Spa

• Average Cost in Illinois: $22,520
• A separate spa unit for relaxing hydrotherapy, neighboring or independent of the main pool.

 

Recreation

Simple Pool Slide*

• Average Cost in Illinois: $6,433
• A standard slide for family use.

Deluxe Pool Slide*

• Average Cost in Illinois: $10,447
• More height and design details than a basic model.

Diving Board (Type 1 Diving Pools Only)*

• Average Cost in Illinois: $4,627
• Only manufacturer-designated Type 1 diving pools support diving board installation. Homeowners should use only manufacturer-approved diving boards with pool models designated as diving pools and must consult a licensed professional to verify compliance with all local building codes and safety requirements before installation.

*Thursday Pools strongly advises against pool slides and diving boards due to safety concerns. The inclusion of a diving board or slide with any fiberglass pool must be carefully reviewed by a licensed professional to ensure compliance with all local building codes, safety regulations, and manufacturer guidelines. Not all fiberglass pool models are suitable for diving or slide use. It is the responsibility of the homeowner and installer to ensure proper installation and usage. Always prioritize safety and consult a qualified expert before adding any diving or sliding feature to your pool.

 

Frequently Asked Questions About Illinois Fiberglass Pool Costs

How much does a fiberglass pool cost in Illinois?

A fiberglass pool in Illinois costs an average of $73,333 for a small pool, $88,611 for a medium pool, and $102,500 for a large pool, based on Thursday Pools’ 2026 survey of the state’s independent dealers.

What does a standard fiberglass pool installation in Illinois include?

A standard fiberglass pool installation in Illinois typically includes:

• Excavation and Dirt Hauling: Soil removal and site preparation.
• Pool Shell and Delivery: The physical fiberglass pool shell unit delivered to your home.
• Filtration System: Basic pump, filter, and plumbing.
• Standard Decking: Approximately 3 feet of concrete surrounding the pool.
• Permits and Basic Electrical: Includes local Illinois municipal filings and one LED pool light.

What yard conditions raise fiberglass pool installation costs in Illinois?

Clay-heavy soil throughout many Illinois regions can create drainage and stability concerns during installation. Rocky soil in certain geological areas requires specialized excavation equipment and additional labor. Sandy soils in specific regions may need additional stabilization measures. Sloped yards often need grading work to create a level base. Limited backyard access, such as narrow gates or tight side yards in urban neighborhoods, can require crane service or specialty equipment. Based on the 2026 Illinois dealer survey, site-condition upcharges range from about $1,947 for clay-heavy soil to $5,994 for limited yard access.

What are Illinois’ pool fence requirements?

Illinois pool barrier and fencing requirements are set by local municipalities and counties, and vary by jurisdiction. Common baseline requirements include barriers of sufficient height to prevent unauthorized access, self-closing and self-latching gates, limited ground clearance, and openings that prevent a child from passing through. Some jurisdictions impose stricter standards. Chicago, for example, requires barriers at least 5 feet high with self-closing, self-latching gates. Homeowners should verify current requirements with their local municipality and county building department before installation.

The 2026 Thursday Pools survey of Illinois independent dealers shows an average cost of $10,913 for a 300-linear-foot basic fence, with final costs varying by material, height, gate requirements, terrain, and local code compliance.

How much do common pool upgrades add to the cost in Illinois?

Upgrade costs vary widely depending on the feature:

• A pool heater averages $6,047.
• An automatic pool cover averages $15,760.
• A paver patio of approximately 1,200 square feet averages $14,860.
• An add-on spa averages $22,520.
• Smaller additions like deck jets ($2,667 per jet), bubblers ($4,680 per bubbler), and LED lights ($2,549 per light) add cost in more manageable increments.

How do I get an accurate cost estimate for a fiberglass pool in Illinois?

The most accurate estimate comes from a local independent Thursday Pools dealer who can assess your yard, review local permit requirements, and give you a project-specific quote. Survey averages provide a useful starting point, but site conditions, design choices, and local labor rates determine what you actually pay.

 

Get Your Personalized Illinois Pool Estimate

Survey averages give you a realistic starting point, but your actual cost depends on your yard, your location in Illinois, and the design details and upgrades you choose. A local independent Thursday Pools dealer can assess your site, walk you through pool options that fit your budget, and give you a project-specific quote, whether you’re in Chicago, Springfield, Rockford, Peoria, or anywhere across the state.

 

Thursday Pools manufactures fiberglass pool shells and does not install pools. Pools are installed by locally owned independent dealers. Consumers should consult a local independent dealer for the most accurate and updated information based on the unique conditions of their region and property.