Basement Remodeling & Finishing in St. Louis, MO
Turn an unfinished or outdated basement into space your family actually uses — a family room, home office, guest suite, or basement bathroom. We address moisture first, so the finish work lasts.
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Why St. Louis Homeowners Choose HZ
One Team for Your Basement, From Bare Concrete to Final Walkthrough
A basement remodel brings together framing, insulation, electrical, drywall, flooring, and finish work. When those steps aren’t coordinated, timelines slip and problems end up hidden behind new walls. HZ Construction manages your project with one team, so every phase happens in the right order and nothing gets covered up before it’s done right.
What’s Included in Your Basement Remodel
- Framing & Insulation
Straight, properly insulated walls that keep your lower level comfortable year-round.
- Drywall, Ceilings & Paint
Smooth, finished surfaces with clean edges, so the basement feels like the rest of your home.
- Flooring Made for Below Grade
Moisture-resistant options like luxury vinyl plank that hold up on a concrete slab.
- Bright, Modern Lighting
Recessed lighting that turns a dark basement into space you actually want to use.
- Basement Bathrooms
Full or half baths that make your lower level more practical for family and guests.
- Room Buildouts
Family rooms, home offices, guest rooms, and entertainment areas planned around how you live.
Done Right Behind the Walls, Not Just on Them
- Moisture Checked First
We look for signs of water and humidity before framing, so new finishes aren’t at risk.
- Materials Chosen for Basements
Products selected for below-grade conditions, balancing durability, comfort, and budget.
- Access Where You Need It
Layouts that keep your water heater, electrical panel, and shutoffs reachable.
- Clean Finish Details
Tight transitions where flooring, trim, and walls meet. The details that separate good work from great.
- A Protected Home
A clean, contained work area that keeps dust and debris out of the rest of your house.
- Final Walkthrough
We review every detail with you before we call the project complete.
Ready to Turn Your Basement Into Living Space?
Tell us about your basement and we’ll schedule a free on-site estimate.
Your Basement Is Square Footage You Already Own
Before you pay for an addition or start shopping for a bigger house, look down. Your basement already has the foundation, walls, and structure in place. It just needs to be finished. We turn unfinished and outdated basements across St. Louis into family rooms, home offices, guest rooms, and play areas your family will use every day.
Real Basement Projects in St. Louis
These are our own project photos. Here’s what one St. Louis basement looked like when we started, and what it became.
How It Works
Our Basement Remodeling Process, Step by Step
Knowing what happens next makes a remodel easier to plan around. Here’s how a typical basement project with HZ Construction moves from the first visit to the final walkthrough.
1. On-Site Visit & Moisture Check
We walk the space with you, talk through how you want to use it, and check for signs of water or humidity before anything else.
2. Detailed Written Estimate
You get a clear estimate that breaks down the scope, so you know exactly what’s included before work begins.
3. Framing, Insulation & Rough-Ins
Walls are framed and insulated, and the space is prepared for lighting, outlets, and any bathroom plumbing.
4. Drywall, Ceilings & Flooring
Surfaces are finished, ceilings are completed, and durable below-grade flooring goes down.
5. Trim, Paint & Final Details
Trim, doors, paint, and fixtures bring the space together so it feels like part of your home.
6. Final Walkthrough
We review every detail with you before we call the project complete.
Basement Finishing Questions From St. Louis Homeowners
Straight answers about cost, timelines, permits, moisture, and what’s possible in your basement.
Still Have Questions?
Talk to our team about your basement. We’ll walk the space with you at no cost.
01How much does it cost to finish a basement in St. Louis?
The cost to finish a basement in St. Louis depends mainly on its size, the layout, and what you add. A basement bathroom, extra rooms, and premium finishes raise the price, while choices like a painted open ceiling and vinyl plank flooring keep it lower. We provide a free on-site estimate with a detailed written breakdown, so you know exactly what you’re paying for before any work begins.
02How long does it take to finish a basement?
Most basement finishing projects take several weeks from framing to final walkthrough. Adding a bathroom, building more rooms, or waiting on city inspections can extend the schedule. Before work starts, we give you a realistic timeline based on your specific basement.
03Do I need a permit to finish a basement in St. Louis County?
In most cases, yes. St. Louis County and most cities in the area require a building permit to finish a basement, plus electrical and plumbing permits when that work is part of the project. Requirements vary by municipality, so we review what your project needs during the estimate.
04Can you finish a basement that has water or moisture problems?
Not until the source of the water is fixed. Finishing over an active leak or high humidity traps moisture behind new walls and can lead to mold and damaged materials. We check for signs of water before any framing, and if we find a problem, we explain it and the right fix before your project moves forward.
05Can you add a bathroom to my basement?
Yes. A basement bathroom is one of the most popular upgrades for a lower level. If your basement already has rough-in plumbing, the process is simpler. If not, we’ll explain what’s needed to bring plumbing to the location you want.
06Can a finished basement include a legal bedroom?
Yes, as long as it meets building code. A basement bedroom needs a proper emergency exit, usually an egress window, along with smoke detection and adequate ceiling height. During the estimate, we’ll let you know whether your space can support a bedroom and what it requires.
07What is the best flooring for a finished basement?
Luxury vinyl plank is one of the best choices for basements in St. Louis. It’s moisture-resistant, comfortable underfoot, holds up on a concrete slab, and looks like real wood. Solid hardwood is generally not recommended below grade because it reacts to humidity.
08Do you remodel basements in St. Charles, Chesterfield, and Ballwin?
Yes. HZ Construction provides basement finishing and remodeling throughout St. Louis County and St. Charles County, including St. Louis, St. Charles, Chesterfield, Ballwin, and surrounding communities. Contact us to schedule a free on-site estimate.
Basement Remodeling Across St. Louis & St. Charles County
HZ Construction is a local basement remodeling contractor serving homeowners throughout the St. Louis area. Different neighborhoods have different homes, and different basements. Here’s what we typically see and how we plan for it.
St. Louis City & Inner-Ring Suburbs
In areas like Kirkwood, Webster Groves, Brentwood, Clayton, and Ladue, many homes are decades old. Their basements often have older foundation walls, lower ceilings, and a history of moisture. We assess those conditions first, then plan a finish that works with the space instead of against it.
West County & St. Charles County
In communities like Chesterfield, Wildwood, O’Fallon, and Wentzville, many basements have poured concrete walls, taller ceilings, and existing plumbing rough-ins. That makes them strong candidates for a full finish with a bathroom, bedroom, or media room.
St. Louis City & County
- St. Louis
- Chesterfield
- Ballwin
- Wildwood
- Kirkwood
- Webster Groves
- Ladue
- Clayton
- Brentwood
- Creve Coeur
- Maryland Heights
- Fenton
St. Charles County
- St. Charles
- O’Fallon
- Wentzville
Jefferson County
- Arnold
Serving St. Louis and Surrounding Areas
Office Hours
Monday to Friday,
8:00 AM to 4:00 PM.
Start Your Project Estimate
Available for remodeling inquiries
Planning a kitchen, bathroom, basement, flooring, siding, or general construction project? Contact our team today for a free estimate.
Request a Free Estimate Call Now: (314) 339-4253