Thinking about putting in a fiberglass pool? Use this guide to learn about fiberglass pool costs in St. Louis, MO.
How Much Does a Semi-Inground Pool Cost in St. Louis, MO? [2026 Data]
Pool construction and installation costs depend on your project and location. Check with a local pro for your specific job.
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Cost Insights
Homeowners can expect to pay an average of $11,000 for a 12-foot semi-inground pool in St. Louis, MO.
Pool material impacts cost, with concrete costing the most and steel costing the least.
If you need to hire a grading and excavation pro, it costs $75 to $170 per hour, depending on project complexity.
Hiring a pool-building pro in St. Louis, MO, ensures your pool is finished well and helps avoid leaks or lawn damage.
Homeowners in St. Louis, MO, considering a semi-inground pool can expect installation costs to be comparable to national averages, though local labor rates, site conditions, permitting requirements, and material choices all influence the price. The cost to install a semi-inground pool in St. Louis, MO, ranges from $6,657 to $19,020, with an average cost of $11,412.
Several factors affect the budget, including the pool's size, shape, material, and the amount of excavation and grading required. The clay-rich soils, rolling terrain, drainage requirements, and seasonal freeze-thaw cycles in the area can increase installation complexity and labor costs. Homeowners should also budget for additional features such as decking, fencing, landscaping, lighting, heating systems, and automatic pool covers to create a functional and attractive outdoor living space.
Semi-Inground Pool Cost Factors
The price you’ll pay for a semi-inground pool in St. Louis, MO, will depend on the pool size and the materials used. Here’s a breakdown of how these affect the budget.
Pool Size
The size of your pool makes the biggest impact on cost. The larger your semi-inground pool, the higher the cost, with prices ranging from $8,900 for a 10-foot-diameter pool to $28,200 for a 24-foot-diameter pool. Standard pools in prefabricated shapes will cost less than those with custom measurements. Most semi-inground pools are between three and eight feet deep, depending on your preference.
Here’s how your semi-inground pool cost will vary based on size:
| Size (Feet) | Average Cost |
|---|---|
| 10 | $8,900 |
| 12 | $11,000 |
| 16 | $16,200 |
| 20 | $22,300 |
| 22 | $25,000 |
| 24 | $28,200 |
Angi Tip
No time to maintain your pool? Most pool contractors offer seasonal maintenance. Talk to your pro about scheduling check-ups to keep your pool healthy.
Materials
Another component to consider when putting in a pool is the material you choose. Steel averages $3,000, while concrete averages $22,000. Choose vinyl, fiberglass, or concrete for building up the land around an in-ground pool, and steel, resin, or aluminum for partially sinking an aboveground pool into the land.
In St. Louis, MO, fiberglass pools are a preferred choice due to their durability, low maintenance requirements, and ability to withstand seasonal temperature changes. Vinyl-liner pools remain a popular budget-friendly alternative, offering a lower initial investment, while concrete pools are best suited for homeowners seeking complete design flexibility, custom features, and upscale outdoor living spaces.
Here’s how your semi-inground pool material might affect the cost:
| Material | Average Cost | Best For |
|---|---|---|
| Concrete | $22,500 | Building up land |
| Fiberglass | $16,300 | Building up land |
| Vinyl (liner) | $7,300 | Building up land |
| Aluminum | $4,100 | Partially sinking |
| Resin | $4,200 | Partially sinking |
| Steel | $3,100 | Partially sinking |
Pool Pro Costs
Homeowners in the St. Louis, MO, area should also budget for labor, permits, and other location-specific expenses that contribute to the cost of installing a semi-inground pool. Below are some of the most common costs to consider when hiring a pool-building pro in St. Louis, MO.
Labor
Labor is one of the largest portions of a semi-inground pool installation cost, accounting for 40% to 60% of the budget. Pool builders in St. Louis, MO, charge $70 to $145 per hour, depending on the complexity of the installation, excavation needs, yard accessibility, utility locations, soil conditions, and the amount of grading or drainage work required.
Pool installation pros oversee every stage of the project, including excavation, pool assembly, plumbing, electrical work, backfilling, and finishing. In St. Louis, MO, where expansive clay soils, rolling terrain, periods of heavy rainfall, and seasonal freeze-thaw cycles can affect installation, experienced contractors can recommend proper site preparation, drainage solutions, and pool materials designed to perform well in the local climate.
Additional Pros to Consider Hiring
Depending on your project, you may need to hire additional professionals to complete the installation or customize your backyard.
Electricians may be needed to install dedicated circuits, pool pumps, lighting, heaters, automation systems, or GFCI-protected outlets. Licensed electricians in St. Louis, MO, charge between $80 and $155 per hour.
Excavation and grading contractors may also be necessary for properties requiring extensive earthmoving, drainage improvements, retaining walls, or site leveling. These pros charge $75 to $170 per hour, depending on soil conditions and the scope of the work.
Permits
Most semi-inground pool installations in St. Louis, MO, require permits, especially when the project involves excavation, electrical work, plumbing, decks, or fencing. Permit costs range from $125 to $350, with additional inspection fees that may be required to verify compliance with local building and safety codes.
Permit requirements vary depending on the size of the pool and the scope of the installation. Reputable St. Louis, MO, pool contractors are familiar with local permitting requirements and can obtain the necessary permits, coordinate inspections, and help ensure the installation complies with all applicable local regulations.
Does a Semi-Inground Pool Increase Home Value?
In St. Louis, MO, installing a semi-inground pool can improve a home's appeal and provide added value, especially for buyers looking for functional outdoor living spaces. A semi-inground pool provides a return on investment (ROI) of 30% to 50%, as it can make a property more attractive to homeowners seeking a backyard space for relaxation, recreation, and entertaining.
A professionally installed semi-inground pool can enhance curb appeal, increase usable outdoor space, and create a standout feature in the backyard. Additions such as decking, landscaping, pool lighting, patios, and safety fencing can further improve the pool's appearance and usability. With the area’s hot, humid summers and growing demand for outdoor amenities, a well-maintained semi-inground pool can be a desirable feature that helps a home stand out in the local real estate market while providing years of enjoyment for homeowners and their families.
How Angi Gets Its Local Cost Data
To help homeowners plan their next project, Angi provides readers with carefully researched cost data and upholds strict editorial standards. We start with national average project costs, which we collect by analyzing competitor information, retailer material costs, and input from professional contractors. We then apply local price index data to calculate location-specific estimates that reflect what homeowners typically pay in their local area. To do that, we use data from the U.S. Bureau of Economic Analysis (BEA), including its Regional Price Parities (RPPs), which measure price differences across cities. This helps us account for differences in labor, materials, and overall cost of living, so estimates in higher- or lower-cost areas better reflect real-world local pricing.
Every estimate undergoes a thorough editorial review to verify accuracy, consistency, and alignment with observed market conditions.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Pool constructions and installations reviews from real Angi homeowners in Saint Louis, MO
4.5★ avg. • 21 total reviews
- Helen A.
It is with pleasure that I submit a review for Midwest Construction Company. My project manager, NATHAN PRICE was absolutely fantastic. NATHAN is very knowledgeable and an expert in building and construction. A number of damages the insurance company didn't include in their report were...
Midwest Construction Group, LLC - Shirley H.
Midtown installed a new roof for me and the crew was awesome. I'm happy with their work and clean-up. Took 1 day!
Midtown Home Improvements, Inc. (St. Louis) - Gregory J.
The floor installation went exactly as planned. The work was done, professionally and on time as promised. This was a continuous floor throughout the apartment. The work was seamless.
CVM Enterprises, Inc. - Louisa K.
Jason the owner of the company is very knowledgeable in many areas of repair and installation. I have hired him on several occasions for various things. stucco work, repairing an arch in the front of my house that was allowing water to get in. Wiring an outlet in my garage so I could turn...
JMBC Contracting LLC - Martha M.
We have used Birkenmeier and sons for several construction jobs at our home in Clayton. Each time, they did a great job and exceeded our expectations.Al was great communicating throughout the projects. He is detail oriented and provided highest quality work. He is experienced and able to help...
- Michael A.
Matt and crew did an excellent job in our 120 yr old house. Paid attention to detail. Made installation of vinyl plank flooring appear as if it was in a new home. Would hire again.
Hard Surface Flooring, LLC - Clayton H.
My wife and I are very pleased with the product and installation. The attention to detail and professionalism were a breath of fresh air. This experience was so much more than we expected. We highly recommend this company. A+++
Mad City Windows & Baths - Anna R.
Mike installed 2 ceiling fans in our home, he did a great job and cut clean holes for wiring. He was able to install the fan with the existing ceiling medallion to match with the character of our home! Now we have better airflow and it’s cooler in those rooms already!
Power Up Electrical Contractors, LLC - Tim W.
Installed decks, walls and steps around new pool. Great work!
Baker Landscaping & Concrete, LLC - Jon F.
The crew cleaned up well after themselves, and the best part was my installation date was moved up ~5 weeks from the initial estimate due to some found time on the schedule. I'll be recommending these guys moving forward
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