Basement Finishing
Converting raw basement space into finished rooms — framing, flooring, drywall, HVAC. Built to code and inspected.
Learn moreBasement work done right, start to finish.
Basement Finishing & Remodeling in St. Louis
From rough framing to finished bar — we handle permits, permits, and cleanup. Most projects start within 2 weeks.
- Licensed & Insured
- Upfront Pricing
- Fast Turnaround
Locally owned & operated
Licensed & Insured
Serving 12 communities
What we do
What STL Basement Finishing does for St. Louis
Every engagement starts with a straight answer and clear pricing — and ends with a result you can see.
Basement Bar Construction
Custom bar builds in finished basements — countertops, shelving, sink rough-in, and electrical. Permits and inspections included.
Learn moreBasement Bathroom Addition
Adding full or half bathrooms to basements — rough-in plumbing, venting, framing. Licensed plumber coordinates final hookup.
Learn moreLoad-Bearing Wall Assessment and Framing
Evaluating basement walls for load-bearing capacity and installing support posts or beams. Permits and structural inspections included.
Learn morePlywood Subfloor Installation
Installing subfloor over concrete — plywood or engineered boards on sleepers or joists. Moisture-resistant, level, and code-compliant.
Learn moreBasement Flooring
Carpet or hardwood over subfloor — moisture-resistant options, professional install, and finished trim. Backed by warranty.
Learn moreBasement Heating Installation
Adding heat to finished basements — ductwork extensions, mini-splits, or radiant systems. Sized correctly and permitted.
Learn moreWhy choose us
The way service should work
Licensed & Insured
We pull permits, pass inspections, and carry full liability coverage on every job.
Upfront Pricing
No surprise invoices — we quote the full scope and materials before we start framing.
Fast Turnaround
Most basements move from demo to drywall within 4–6 weeks depending on scope.
Local Service
We serve St. Louis and East Saint Louis to Granite City — same-day callbacks.
Where we work
Proudly serving the St. Louis metro
Good to know
Common questions
How long does a full basement finish take?
Most 1,000–1,500 sq ft basements finish in 6–8 weeks once framing inspection clears. Delays depend on permit timeline and any structural work needed first. We schedule around your contractor availability.
What's included in a basement finish?
Framing, insulation, drywall, flooring, painting, and trim. Electrical, plumbing, and HVAC connections tie to existing systems — those trades may be separate. We'll spell out what's included in the quote.
Do I need a permit?
Yes. Any finished basement in St. Louis requires a permit and framing inspection. We handle the application and coordinate inspections — that's built into our timeline.
Basement work done right, start to finish.
From rough framing to finished bar — we handle permits, permits, and cleanup. Most projects start within 2 weeks.
From the field
Advice that saves you money
Radiant Heat Flooring Cost for a St. Louis Basement: What Actually Drives the Price
If you are pricing out a basement finish in St. Louis, radiant heat flooring cost is usually the number that surprises people, in both directions. Some homeowners assume heated floors are a luxury reserved for high-end builds. Others assume it is a cheap add-on because "it's just a mat under the tile." Neither is right. […]
Basement HVAC Heating System Guide: Ductwork, Zoning, and Comfort in St. Louis, MO
The sequence a basement-first contractor follows when planning heating, ductwork, and zoning before framing begins. A finished basement that stays cold from October through April is a room your family will stop using by Thanksgiving. That is why planning the basement HVAC heating system belongs near the front of any basement finishing project, not as […]
Basement Bathroom Addition Plumbing: A Step-by-Step Guide for St. Louis Homes
The seven-step sequence for basement bathroom rough-in plumbing, from moisture check to final inspection. If you just bought a house in St. Louis with an unfinished basement, adding a bathroom down there is one of the smartest moves you can make before the furniture arrives. It is also the part of the job where corners […]