Get free adu construction quotes in St. Louis
Free adu construction quotes in St. Louis, Missouri. Typical range $141,000 – $282,000.
Low
$141,000
Average
$211,500
High
$282,000
St. Louis crews quote about $235 – $470 per square foot.
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What drives adu construction prices in St. Louis
Local labor, permitting and climate move St. Louis prices away from the national average.
Labor market
Licensed trade labor in St. Louis runs about 94% of the national average, and the best crews book out fastest in spring and early summer.
Permits
Most St. Louis, MO projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not.
Climate
Missouri weather drives material choices here, so ask contractors what they install most often in St. Louis and why.
How to compare St. Louis quotes
- Collect three written quotes. Anything under $105,750 usually has scope missing.
- Compare line items — materials, labor, permits, disposal — not just the total.
- Confirm license, insurance and workmanship warranty length before you sign.
- Ask what triggers a change order and how it gets priced.
St. Louis questions
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