How Much Does a Fiberglass Pool Cost in Illinois?

Several factors influence fiberglass pool costs regardless of the state. That said, fiberglass pools can be an economical choice in Illinois compared to other pool types. Despite Illinois’ wide temperature swings and freeze-thaw cycles, fiberglass pools are extremely durable. Their long-term durability lowers the lifetime ownership costs in the Prairie State. However, there are more considerations to the fiberglass pool cost in Illinois.

 

Beyond weather conditions, Illinois homeowners should also factor in local zoning regulations, permit requirements, and installation complexities. In metropolitan areas like Chicago and its suburbs, space limitations and excavation challenges can affect overall costs, while rural homeowners may have more flexibility with pool size and design. Additional features like built-in tanning ledges, heating systems for an extended swim season, and energy-efficient filtration can further impact the total investment.

What’s the Average Cost of an Illinois Fiberglass Pool Installed? Survey Says …

 

After a 2025 comprehensive survey of our independent dealers in the state, Thursday Pools compiled helpful data to give you an idea of typical fiberglass pool costs in Illinois. 

AVERAGE ILLINOIS FIBERGLASS POOL INSTALLATION BY SIZE
Pool Type	Small Fiberglass Pools	Medium Fiberglass Pools	Large Fiberglass Pools
Size Range	Up to 26 ft Long or 400 ft²	26 to 34 ft Long or 400 to 600 ft²	35 ft and Longer or 600+ ft²
Average Cost	$82,000	$106,000	$124,000

 

Keep in mind that fiberglass pool costs will vary based on the size of pool you want and where in Illinois you live. You can always contact a Thursday Pools dealer near you to get a personalized quote and explore financing options for your fiberglass pool project.

Average Cost of Popular Pool Models Installed in Illinois

ASPEN (12’ x 25’)

The Aspen is available in five unique sizes—the smallest of which is perfect for fitting into more compact backyards of Illinois metro and suburban areas. The design offers ample space to swim and a built-in tanning ledge for relaxing or watching over younger swimmers. 

According to our survey of independent Thursday Pools dealers in Illinois, customers can expect to pay an average of $82,000 for a standard Aspen installation—or other small Thursday Pools pool design less than 26 feet long and less than 400 square feet.

 

 

SUN DAY (15’ x 30’)

The Sun Day brings graceful freeform elegance to mid-size or larger yards in three sizes. The most compact version of the Sun Day design should easily fit into most suburban Illinois yards while leaving space for other outdoor living features. Highlights of this pool design include a large landing pad and built-in entry stairs, wraparound benches, a deep-end courtesy ledge, and a separate swim-out sun shelf. 

Per our independent dealer survey, Illinois customers pay an average of $106,000 for standard installation of the 15’x30’ Sunday or other medium-sized Thursday Pools pool design. 

 

 

MACK DADDY (16’ x 36’)

For those with large dreams, Thursday Pools has plenty of large pool designs, including the pinnacle of pools, the Mack Daddy. This design is our first to feature a fully integrated spa with a spillway in addition to a spacious tanning ledge, a separate conversation area with wraparound benches and wide entry steps, and an open swim lane with a uniform flat-bottom depth.

Larger pools 35 feet long and 600 square feet or more, unsurprisingly, come with a higher cost. Our independent dealers in Illinois report customers pay an average of $124,000 for a standard installation of large fiberglass pools. 

 

Factoring in Your Illinois Yard 

Illinois is home to various soil types, and the ground beneath your backyard can influence the overall cost of installing a fiberglass pool. Additional reinforcement may be necessary to prevent shifting if your property has soft, sandy soil. Rocky soil or heavy clay, common in many parts of the state, can make excavation more challenging and increase labor costs.

 

A professional pool installer should assess your soil type before breaking ground to ensure your pool installation is secure. While difficult soil conditions may add to your initial costs, proper preparation is essential for the long-term durability of the pool.

 

Because every yard is unique, factors like slope and accessibility can impact the installation process and overall cost of a fiberglass pool in Illinois. Homes with sloping backyards may require additional grading and retaining structures to create a level foundation, while properties with limited access—such as fenced-in lots or densely populated neighborhoods—might need a crane rental or specialized equipment to access the site and place the pool shell.

 

AVERAGE ADDITIONAL YARD-RELATED EXPENSES IN ILLINOIS
Excavating Sandy Soil	$2,340
Excavating Clay Soil	$2,260
Excavating Rocky Soil	$2,690
Above-Average Slope Requiring Extra Grading	$4,060
Limited Yard Access	$4,370

Regulations: Illinois Swimming Pool Fence Requirements

Ensuring the safety of people and animals around your fiberglass pool in Illinois involves adhering to specific state and local regulations regarding protective barriers. The Illinois Private Swimming Pool Enclosure Act mandates that owners of new residential swimming pools enclose the pool area with a fence, wall, or other effective permanent barrier at least 42 inches (3.5 feet) in height. 

 

It’s important to note that local jurisdictions often impose more stringent standards. Many Illinois municipalities require pool fences to be at least 48 inches (4 feet) tall with durable, non-climbable materials. Gates providing access to the pool area must be self-closing and self-latching, with latches positioned at a height inaccessible to small children.

 

Private pool fencing and other requirements often vary from one neighborhood to the next, so be sure to ask your local pool professionals, municipalities, and homeowners association for the most up-to-date laws, ordinances, and policies covering inground pools. 

 

For a 300-foot linear-feet fence, Illinois homeowners can expect to pay an average of $9,420. 

 

Optional Features and Additions that Factor into Fiberglass Pool Cost in Illinois

Enhancing your fiberglass pool with optional features and add-ons can transform your backyard into the ultimate private retreat and staycation destination. While not essential, luxury upgrades can boost comfort, convenience, and overall enjoyment for your family. Average prices based on our 2025 survey of pool dealers across Illinois follow.

 

Pool Heater Average Cost in Illinois: $4,720

Extend your swim season by keeping your water warm and at your perfect, preferred temperature—even on cooler days. 

 

UV Filter System Average Cost in Illinois: $2,690

Reduce chlorine use and improve water clarity by eliminating bacteria and algae with ultraviolet light. 

 

Pool Automation and Smart Control System Average Cost in Illinois: $5,590 

Manage pool temperature, lighting, and filtration from your smartphone for added convenience.

 

Poured-Concrete Patio (Approx. 1,200 Square Feet) Average Cost in Illinois: $9,810

Create an approximately 8-foot-wide deck area around a standard rectangular pool. Concrete offers a durable, budget-friendly surface that withstands Illinois freeze-thaw cycles well.

 

Paver Patio (Approx. 1,200 Square Feet) Average Cost in Illinois: $12,200

Provide an elegant, slip-resistant deck area about 8 feet wide around a standard pool. Paver materials range from economical concrete pavers to higher-end natural stone like travertine. In Illinois, concrete and clay brick pavers perform best in freeze-thaw conditions, while softer stones like limestone may be less durable.

 

Non-Automatic Safety Pool Cover Average Cost in Illinois: $6,430

 A manual option for safely securing your pool and keeping debris out.

 

Automatic Pool Cover Average Cost in Illinois: $14,150

With the push of a button, cover and uncover your pool effortlessly for optimal safety and cleanliness.

 

Automatic Pool Cleaning and Vacuuming System Average Cost in Illinois: $3,050

Spend less time maintaining your pool with a built-in cleaning system.

 

Surrounding Landscaping Average Cost in Illinois: $7,230 

Decorative rocks, trees, bushes, and flower beds add beauty and privacy to your backyard oasis.

 

Simple Pool Slide* Average Cost in Illinois: $5,140

Simple slides offer a classic, straightforward design.

 

Deluxe Pool Slide* Average Cost in Illinois: $9,540

Taller, curvier slides can add a resort-like feel. 

*Thursday Pools strongly advises against pool slides due to safety concerns

 

Diving Board (Type 1 Diving Pools Only) Average Cost in Illinois: $3,490

Diving boards are only permitted on certified Type 1 diving pools, and even then, Thursday Pools does not recommend them for safety reasons. If installed, they should always meet proper depth and slope requirements for safe use.

*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.

 

Specialty Waterline Tile Average Cost in Illinois: $4,570

Personalize your pool with stylish tile accents along the waterline.

 

LED Pool Lights Average Cost in Illinois: $1,442.70 per light

Color-changing or white LED lights create ambiance and improve nighttime visibility.

 

Deck Jets Average Cost in Illinois: $900 per jet

Shoot graceful arcs of water from the deck into your pool for a playful, elegant touch.

 

Bubblers Average Cost in Illinois: $1,480 per bubbler

These small fountains on beach entries and tanning ledges add visual appeal while providing relaxing sound for the adults and entertainment for the little ones.

 

Cascades or Waterfalls Average Cost in Illinois: $3,400

Add the peaceful, soothing sounds of rushing water and elevate your pool’s aesthetic with a spa-like waterfall made of natural stone or other materials.

 

Add-On Spa Average Cost in Illinois: $9,640

Enhance your relaxation with a spa beside your pool for a seamless, luxurious spillover effect. Perfect for unwinding after a swim, a spa can add year-round comfort and therapeutic benefits.

 

Make a Splash in the Prairie State—Talk to an Independent Thursday Pools Dealer in Illinois

Because every home and installation site is unique, consulting with a local independent Thursday Pools dealer is the best way to get an accurate cost estimate. They can assess your yard’s conditions, provide expert guidance on all costs, and help you choose a pool design and options that fit your vision and budget.

 

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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.