Thinking about adding a fiberglass pool to your St. Louis, Missouri backyard? It's important to understand what goes into the cost. Pricing depends on several factors, such as pool size, property access, soil conditions, city regulations, and the features or upgrades you choose.

Based on a 2025 survey conducted by Wildwood Best Pools with their dealer network across Missouri, the average cost for a small fiberglass pool (up to 26 feet long or 400 square feet) is around $60,000. A mid-sized pool (26 to 34 feet long or between 400 and 600 square feet) typically runs about $80,000. If you're considering a large fiberglass pool (35 feet or longer, over 600 square feet), the average cost is approximately $106,667.

These numbers are general benchmarks. Final pricing will vary depending on your location—whether you're in Wildwood, Kirkwood, Ballwin or the surrounding areas—as well as the complexity of your installation.

For the most accurate pricing and guidance, it’s best to speak with a local Wildwood Best pools installer. They can evaluate your property, help you plan your project, and walk you through options for financing.

At Wildwood Best Pools, we know that no two Missouri backyards are the same—and that’s exactly what makes fiberglass pool design so exciting. Your yard's layout, access points, slope, and soil conditions will all play a big role in determining the type of pool that fits best, both functionally and visually.

For example, a level, open yard offers more flexibility for larger fiberglass pool models and surrounding features like patios, spas, and outdoor kitchens. On the other hand, sloped or compact spaces may require creative design solutions—such as retaining walls, custom decking, or elevated entry points—to make the most of your available square footage.

Soil type can also affect installation. Missouri has a mix of clay-heavy and rocky soils, which means some properties may need additional excavation work or drainage considerations to ensure long-term durability.

At Wildwood Best Pools, we assess all these factors during your initial consultation. Our team will walk your yard, listen to your vision, and recommend fiberglass pool options that not only suit your landscape but also enhance your lifestyle.

Ready to see what’s possible in your yard? Contact us today for a free estimate and expert guidance tailored to your unique property.

Fiberglass pools come in a variety of shapes to suit different aesthetics, yard sizes, and functionality needs. Common fiberglass pool shapes include:

1. Rectangular – Clean, modern lines ideal for lap swimming and automatic covers.
2. Freeform – Natural, lagoon-like curves that blend well with landscaping.
3. Roman – Classic shape with rounded ends, often featuring built-in steps or seating.
4. Kidney-shaped – Gentle curves that offer a retro or organic feel.
5. L-shaped – Provides distinct shallow and deep-end zones, often great for entertaining.
6. Oval or Circular – Smooth, symmetrical shapes that work well in smaller spaces.
7. T-shaped – Offers extended shallow areas, often used for tanning ledges or lounging.

Some manufacturers also offer customized variations or enhanced features like built-in spas, tanning ledges, or integrated seating.

1. Fiberglass Pool Shell
   This is the prefabricated pool structure, available in various shapes, sizes, and colors. Many include built-in features such as steps, benches, or tanning ledges.
2. Excavation
   Digging the hole to the pool’s dimensions and hauling away the excavated material. Additional charges may apply if access is limited or the soil conditions are difficult.
3. Pool Delivery and Placement
   Transporting the pool shell to your property and setting it in place using a crane or other specialized equipment.
4. Base Material and Backfill
   Installing a gravel or sand base under the pool and backfilling around the shell to ensure stability and prevent shifting.
5. Plumbing and Electrical Work
   Installing plumbing lines for water circulation and electrical systems for the pump, lights, and optional equipment like heaters or salt systems.
6. Pool Equipment
   Includes the pump, filter, skimmer, and standard sanitization system (chlorine or saltwater). Additional options may include heaters or automation systems.
7. Water Fill and System Start-Up
   Filling the pool with water (either via hose or water truck) and balancing the chemicals for safe swimming.
8. Decking and Coping
   Installing the pool’s surrounding surface, which could be concrete, pavers, or stone, and applying coping (the finished edge around the top of the pool).
9. Permits and Inspections
   Securing all necessary building permits and coordinating required inspections with local authorities.
10. Final Grading and Cleanup
    Smoothing out the area surrounding the pool, removing debris, and preparing the yard for landscaping or other improvements.

Optional Upgrades (additional cost)

• Pool fencing or enclosures (often required by code)
• Water features like deck jets or waterfalls
• LED lighting or smart automation controls
• Landscaping or retaining walls
• Pool covers or safety covers

At Wildwood Best Pools, we specialize in crafting custom gunite swimming pools for homeowners in Wildwood, MO, and surrounding communities. Gunite pools are the gold standard in backyard luxury thanks to their design flexibility, exceptional durability, and long-term value. If you're wondering what factors into the cost of a gunite pool installation, this guide will walk you through everything from planning and permits to equipment and optional features.

Custom Pool Design for Your Backyard Vision

Every gunite pool begins with a vision. At Wildwood Best Pools, we offer complete custom design services to bring your dream pool to life. Whether you’re imagining a classic geometric layout or a freeform tropical oasis, gunite construction allows for total design freedom.

During our consultation, we assess your yard, listen to your goals, and create detailed 3D renderings to help you visualize the final result. We also factor in your lifestyle, budget, and property conditions to ensure a design that’s functional and beautiful.

Handling Permits and Code Compliance

Installing a pool in Wildwood, MO requires permits and strict adherence to local building codes. Wildwood Best Pools manages this process for you. We coordinate with city and county offices, ensuring all structural, electrical, and plumbing aspects of your project meet code.

Some properties may require additional engineering approvals or site-specific studies, such as soil tests or slope stability reviews. We handle every detail so you can move forward without delays or surprises.

Excavation and Structural Framing

Once permits are approved, excavation begins. We carefully dig the pool area to match the approved design, shaping the contours and depths based on your chosen style and features. All excess soil is removed or redistributed as needed for landscaping or grading.

Next, a form is constructed using wood or steel to shape the pool structure. This guides the rest of the build and ensures your pool takes the correct form before structural reinforcement begins.

Steel Reinforcement Adds Strength

A gunite pool’s long-lasting durability starts with steel. Wildwood Best Pools installs a dense grid of steel rebar that follows the contours of your pool design. This reinforced steel structure adds strength and stability, ensuring the pool shell can withstand ground movement, water pressure, and long-term use.

This is also the stage when special elements like tanning ledges, built-in spas, or deep ends are framed and reinforced.

Gunite Shell Application

Gunite is a concrete and sand mixture applied through high-pressure spraying, forming the hard shell of your pool. This process gives our team complete control over shaping the walls, floor, and features with smooth curves and seamless contours.

After gunite application, the shell needs time to cure. During this critical phase, we regularly wet down the surface to strengthen the concrete and prevent cracking. The curing process ensures long-term performance and structural integrity.

Plumbing and Electrical Systems

With the gunite shell curing, we begin installing the pool’s plumbing and electrical systems. This includes suction lines, return lines, skimmers, drains, and water feature plumbing. Every pipe is pressure tested for leaks and optimal flow.

Electrical systems are also installed, including wiring for lights, pumps, heaters, automation controls, and timers. Our licensed electricians ensure all installations comply with the National Electrical Code (NEC) and Wildwood city regulations for safety and performance.

Tile, Coping, and Interior Finish

Once the pool structure is complete, we add the finishing touches that bring personality and polish to your outdoor space. First, waterline tile is installed, which protects the pool interior and enhances aesthetics. Then comes the coping—the edge of the pool that provides a clean transition from the pool to your deck.

You can choose from a variety of materials for tile and coping, including ceramic, porcelain, natural stone, or precast concrete. Interior finish options include white plaster, colored plaster, quartz, and premium pebble finishes for added texture and color variation.

Pool Decking and Outdoor Integration

Your pool deck ties the entire space together. Wildwood Best Pools offers a variety of decking materials and styles to complement your home and landscape. Whether you prefer natural flagstone, travertine pavers, exposed aggregate, or stamped concrete, we’ll help you choose a surface that’s both beautiful and slip-resistant.

We can also integrate your pool into a larger outdoor living space with custom patios, seating walls, built-in kitchens, fire pits, or pergolas—making your backyard the ultimate retreat.

Equipment Setup and Pool Automation

Every pool requires efficient equipment to keep it clean, safe, and enjoyable. As part of our installation package, we provide high-performance systems that typically include energy-efficient pumps, cartridge or DE filters, saltwater systems or chlorine feeders, and heaters if requested.

If you want to control your pool from your smartphone or tablet, we offer automation systems that let you adjust lighting, temperature, pumps, and schedules with ease. Brands we trust include Pentair, Hayward, and Jandy for long-term reliability and support.

Pool Startup and Orientation

When construction is complete, we fill the pool and begin the startup process. This includes running all equipment, balancing the water chemistry, and making final adjustments to ensure optimal performance.

Our team will walk you through how to care for your pool, operate your equipment, and maintain water clarity. We also provide a schedule for professional service or maintenance if you choose to enroll in one of our care plans.

Clean-Up and Landscaping Preparation

Wildwood Best Pools ensures your property is clean and construction debris is cleared before we consider the project finished. We can also prep the surrounding area for landscaping, lay down sod, or refer you to trusted local landscapers who can complete your outdoor vision.

Fencing, lighting, and hardscape features can also be added during this phase, depending on your needs and preferences.

Optional Features That Affect Pricing

While the basic components of gunite pool installation remain consistent, homeowners often choose upgrades to increase comfort and enjoyment. Some of the most common enhancements include:

• Built-in spas or hot tubs
• Tanning ledges and sun shelves
• Waterfalls or deck jets
• Fire bowls or fire features
• Smart lighting systems
• In-floor cleaning systems
• Pool covers and safety features

Each of these additions will affect the final cost, but they also enhance the functionality and appeal of your outdoor space.

Ongoing Maintenance and Support

After installation, your pool will need regular maintenance to keep it in peak condition. Wildwood Best Pools offers professional pool maintenance and repair services in Wildwood, MO, including chemical balancing, equipment checks, seasonal openings/closings, and emergency repairs.

We’re here to support you long after the build is complete with reliable service, expert guidance, and fast response times when you need help.

Ready to Build Your Gunite Pool in Wildwood, MO?
Wildwood Best Pools is proud to be your trusted local pool contractor, offering top-tier craftsmanship, transparent pricing, and personalized service from start to finish. If you're ready to explore a custom gunite pool for your home, contact us today for a consultation and estimate.