Basement remodel costs depend on your project and location. Check with a local pro for your specific job.
A basement remodel in St. Louis, MO, costs $21,013 on average, depending on your specific project size.
The total square footage and your choice of custom finishes will significantly impact your final project expenses.
Adding a new bathroom to your basement layout increases your overall budget by $6,280 to $15,700.
Hiring a local basement remodeling pro in St. Louis, MO, provides reliable help with renovations and saves you time.
This article was created using automation technology and thoroughly fact-checked and edited by an Angi Editor in accordance with our AI policy.
A basement remodel in St. Louis, MO, costs $21,013 on average, and often ranges from $12,940 to $30,904. Your total price depends on the square footage of your basement, the quality of materials you choose, and local labor rates. Before starting your basement remodel, understanding these costs helps you plan a project that fits your home and budget.
When planning a project in St. Louis, MO, you need to know exactly what drives the final price tag before hiring basement remodeling contractors. The total expense depends heavily on the square footage of your space, the quality of the materials you choose, and the specific trades required to complete the job.
The footprint of your lower level dictates the volume of materials and the hours of labor required to finish the space. In St. Louis, MO, a complete basement transformation ranges from $12,940 to $30,904, with most homeowners spending around $21,013 for a standard layout. For example, finishing a small basement runs from $6,190 to $15,500, while an oversized basement project costs between $28,600 to $71,400.
| Basement Size | Average Square Footage | Local Average Cost |
|---|---|---|
| Small basement | 300–700 | $6,190–$15,500 |
| Medium basement | 700–1,500 | $16,200–$22,900 |
| Large basement | 1,500–2,000 | $20,000–$32,400 |
| Oversized basement | 2,000–4,000 | $28,600–$71,400 |
Managing multiple trades requires a general contractor to keep the project on schedule and up to code. In St. Louis, MO, contractors charge a flat percentage of the total project price rather than an hourly rate. You should expect to pay between 10% to 25% of the overall budget for their management services.
Upgrading your electrical panel and running new wiring is necessary to support modern lighting and entertainment systems safely. Hiring an electrician in St. Louis, MO, involves flat one-time costs for specific tasks, such as adding outlets for $100 to $450 each or installing new light fixtures for $150 to $900 per unit.
Adding a bathroom or wet bar requires running new supply lines and drains through your concrete slab. A plumber in St. Louis, MO, charges flat rates for these installations, with a new sink costing $215 to $660 and a shower installation running from $1,100 to $8,500. Factoring in your water heater installation cost early helps keep the budget on track if you need a larger unit for the new bathroom.
Complex layouts or specific structural changes require specialized professionals to ensure the space is safe and comfortable. In St. Louis, MO, you need to hire an HVAC contractor for $2,000 to $3,000 to extend your heating and cooling, or an egress window installer for $2,700 to $5,900 to meet safety codes.
The specific rooms and amenities you build into the floor plan directly dictate the final price of the project. In St. Louis, MO, adding a standard bedroom costs between $2,860 to $9,510, while building a custom home theater requires an investment of $9,510 to $57,100.
| Feature | Local Average Cost |
|---|---|
| Bedroom | $2,860–$9,510 |
| Bathroom | $6,280–$15,700 |
| Bar | $765–$21,400 |
| Wine cellar | $4,760–$95,100 |
| Home gym | $290–$14,300 |
| Home theater | $9,510–$57,100 |
| Home office | $1,430–$1,150 |
| Game room | $2,860–$17,200 |
Building the skeleton of your new rooms requires lumber and precise carpentry to establish the layout. Framing an unfinished space in St. Louis, MO, costs between $4 to $10 per square foot for professional installation.
Proper thermal barriers keep the underground space comfortable during the extreme, unpredictable seasons in the Midwest. Adding insulation in St. Louis, MO, costs between $1.50 to $2.50 per square foot, which helps regulate temperatures during hot summers and freezing winters.
Hanging and finishing wallboard transforms the raw framing into a clean, livable interior space. In St. Louis, MO, drywall installation runs between $1.50 to $3 per square foot. If you alter existing walls, you must also account for drywall repair costs to patch any damage.
The materials you select for the ground level must withstand moisture while matching your design aesthetic. Flooring installation in St. Louis, MO, costs between $3 to $11 per square foot for standard materials like vinyl, and $6 to $20 per square foot for tile.
Applying primer and paint seals the drywall and provides the final polished look to your new rooms. Professional painting in St. Louis, MO, averages $4.70 per square foot for the entire finished space, or $2.75 per square foot if you only paint the walls. You can also schedule interior painting for the upper levels at the same time to refresh the whole house.
High humidity and heavy spring flooding in the Ohio Valley climate lead to fungal growth behind old walls. If contractors discover contamination during demolition in St. Louis, MO, you need to hire a pro for mold remediation to ensure the air quality remains safe. Removing small, non-toxic amounts is a flat one-time cost, but extensive cleanup requires a larger budget.
Older homes with original vinyl tiles or millboard contain hazardous materials that require specialized abatement. Hiring a certified removal company in St. Louis, MO, costs an average of $2,100 as a flat one-time cost to safely extract and dispose of the asbestos.
Sealing the foundation is mandatory to protect your investment from the heavy storms and flooding common to the region. Waterproofing your lower level in St. Louis, MO, costs between $5 to $10 per square foot. Incorporating a sump pump installation provides an extra layer of defense against rising groundwater.
Shifting soil from extreme temperature swings causes concrete slabs and walls to crack over time. Minor crack sealing in St. Louis, MO, costs around $500, while extensive structural fixes range from $2,000 to $7,100. Addressing these issues early prevents larger foundation repair costs down the road.
To manage your project in St. Louis, MO, a general contractor charges a flat fee of 10% to 25% of the total budget. You also need specialized trades for specific tasks. For example, professional framing installation in St. Louis, MO, runs $4 to $10 per square foot. Factor in the local 9.68% sales tax rate on materials when calculating your final professional labor and supply expenses.
Before starting a basement remodel, confirm whether your project requires permits in your area and who is responsible for obtaining them. Permit requirements and costs vary by location, but most basement remodel permits range from $500 to $2,000, depending on the scope of work and your local municipality.
Working without the proper permits can lead to fines, project delays, or complications when selling your home. If you're hiring a basement remodeling pro, review your contract to ensure they will handle the permitting process and inspections. To verify permit requirements, visit your city or county's official building department website for the most accurate and up-to-date information.
Hiring basement remodeling professionals in St. Louis, MO, maximizes your home's value while saving you time and ensuring structural safety. We recommend trusting local experts to handle this complex project.
* Contractors secure the correct municipal building permits required for finishing lower levels.
* Experts possess specialized tools to properly install essential moisture barriers against humidity.
* Tradespeople ensure all new wiring and plumbing networks meet strict building codes.
* Professionals source high-quality, waterproof materials at wholesale prices to protect your budget.
Nationally, a basement remodel offers a return on investment of around 70%, making it a highly worthwhile home improvement project. When you bring this project to St. Louis, the value extends beyond the numbers. St. Louis experiences hot, humid summers and chilly winters, so a finished basement provides your family with a comfortable, climate-controlled retreat year-round. Local homebuyers value this extra usable square footage, especially in neighborhoods with historic homes where expanding the main footprint is difficult.
Whether you add a home office, a guest suite, or a playroom, transforming your lower level makes your property stand out in the Missouri housing market. By ensuring your space is properly waterproofed and insulated against Midwestern weather, you protect your home while maximizing its appeal. Consider how a well-planned basement remodel enhances your daily life and provides lasting value for your St. Louis home.
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We’ve surveyed thousands of real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
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They did a really good job waterproofing my basement. The crew was professional, arrived on time, and explained the entire process before getting started, and completed the job with great attention to detail. It's clear they take pride in their work. I'd definitely recommend...
General Installation SystemsHired P & P to update a rental property. They were very professional quick with a quote time response. Very reasonable and fair pricing for all the work done at property. As they began work they fixed and updated things that weren't on quote highly impressed with all their work. Very...
P&P General ContractorsWe could not have been more pleased with our experience with Dana King! This is the design / build / remodel firm you are looking for. We felt taken care of throughout the experience from the initial discussions through to the end. Dana and her project managers guided us through the remodel,...
Dana King Design-Build and RemodelingI think the process was fine. Whenever we called we were able to get what we needed. The guys came in and finished doing the electrical for my basement in 1.5 days. Happy so far with everything.
Innovate ElectricWe 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...
I was extremely pleased with not only the finished product but also in the communication with Tom throughout the whole process. He worked diligently and updated me throughout his work. Also provided many helpful ideas on my remodel. Would certainly recommend!
Quality Carpentry and Remodeling LLCWe hired Brian to mud a previous door entrance that we had installed dry wall on. He was fast and extremely courteous. Heâ s been very responsive when my wife and I text him about future projects, costs, etc., which helps because we our first time home owners. We will definitely be hiring...
TNC Painting & Remodeling LLCOutstanding customer service and didn’t push me into spending more than I needed. Gave me a great deal on my basement repair. Gave me a great repair solution and it seems to be holding back all the water. With the ton of rain, my basement is dry. Would call them again for other repairs I need.
Stratum Structural SystemsSuperb job on my basement floor and ceiling.
They also replace 3 basement windows, one upstairs window and installed E-shield insulation. I will use them again for more home improvements in the future.
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