ADU builders in St. Louis

What ADU builders charge in St. Louis

In St. Louis, a garage conversion ADU typically costs $61,000 – $153,000. Remodeling labor in St. Louis runs about 2% above the US median, which accounts for most of the difference from the same project elsewhere.

How to choose between them

• Check the license yourself. Where Missouri or St. Louis licenses this work, the licensing board's own lookup confirms a license number in a minute. Do it before you sign, not after.
• Get three bids on the same scope. Written down, split into labor, materials, allowances and anything structural. Most people compare a total against a total and end up choosing between two different projects.
• Ask what is not included. Permits, debris removal, fixture and finish allowances, and repairs after demolition are the four that turn a cheap bid into an average one.
• Never pay a large deposit up front. A deposit to order materials and hold a start date is normal. Half the total before anyone shows up is not.

How this list is ordered

These are the firms from Google's results for "adu builders st. louis", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.