ADU Construction in St. Louis, MO
Global Home Views connects homeowners in St. Louis, MO with vetted accessory dwelling units, garage conversions and in-law suites contractors. Accessory dwelling units built to code - detached builds, garage conversions and basement suites - from feasibility and zoning through final occupancy.
(844) 624-3161Email a projectADU Construction cost in St. Louis
Typical St. Louis range: $69,700 - $254,200 per unit. Reflects Missouri labour and material costs. Estimate for planning, not a quote - call (844) 624-3161 for a written scope.
An ADU is a zoning project before it is a construction project. Setbacks, lot coverage, parking relief, owner-occupancy rules and utility capacity decide what can legally go on your lot, and they vary street by street.
Garage conversions read as the cheap route and often are, but the slab usually sits below the required floor height and lacks a moisture barrier, so the real scope includes the floor system most quotes leave out.
Freeze-thaw cycling is the governing condition. Water that gets into masonry, grout or a roof detail expands when it freezes and widens the gap it entered through.
Utilities are the line item that surprises people: whether your existing panel and sewer lateral can carry a second dwelling, or whether you are trenching to the main.
What the job includes
- Zoning and feasibility review
- Plan sets and permit submittal
- Detached, attached and garage conversions
- Separate utility metering
- Kitchen and bath rough-in
- Final inspection and occupancy sign-off
How it works in St. Louis
Tell us the project
Two minutes on the phone or by email. Scope, timing, and whether you have drawings already.
We match the trade
You get contractors who actually do this work in your area, not a directory dump.
Compare written scopes
Quotes that say what is and is not included, so you are comparing the same job.
Work gets scheduled
Permits where needed, inspections booked, and a named contact for the duration.
St. Louis service area
Covering St. Louis and the surrounding Missouri metro.
The map is hidden until you accept cookies.
What St. Louis homeowners search for
ADU Construction questions in St. Louis
How much does adu construction cost in St. Louis, MO?
Most adu construction projects in St. Louis, MO land between $69,700 and $254,200, depending on scope, access and material grade. That is an estimated range for planning, not a quote - call (844) 624-3161 and we will scope your job properly.
Are your St. Louis, MO contractors licensed and insured?
Yes. We only refer contractors carrying current licensing for their trade and active liability coverage, and we re-check both before a referral goes out.
Can I legally build an ADU on my lot?
That depends on your zoning, setbacks, lot coverage and utility capacity. Feasibility review comes first, before any design spend.
Do you pull permits?
Where the work needs them, yes - the contractor files and schedules inspections. Unpermitted work surfaces at resale and is far more expensive to resolve then.
How soon can someone come out?
For repair-scale work, usually the same week. Larger builds depend on design and permitting, which is where most of the calendar goes, not the construction.
Other services in St. Louis
ADU Construction nearby
Get a free St. Louis ADU Construction quote
Written scope, no obligation. Call now or email and we will come back the same day.
(844) 624-3161 contact@globalhomeviews.com