Accessory dwelling unit cost — St. Paul, MN
Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
About this service
The investment required for an ADU depends on your site conditions, the complexity of the design, and the materials selected for the interior. Larger units with custom features naturally shift the price higher compared to standard, compact models. Exact pricing confirmed free on the call.
Frequently asked in St. Paul
What is the cost of an accessory dwelling unit in St. Paul?
What are the benefits of a backyard accessory dwelling unit?
A backyard accessory dwelling unit offers significant benefits in St. Paul. It can provide extra rental income, housing for family members, or a private home office. These units increase housing density and property value without requiring major new developments.
What does 'accessory dwelling unit' mean in Minnesota?
In Minnesota, an accessory dwelling unit (ADU) is a secondary housing unit on a single-family residential lot. It's a smaller, independent living space that is subordinate to the main home. This can be a detached structure or an attached unit.
Who are the best ADU builders near me in St. Paul?
What are the requirements for building an ADU in St. Paul?
What are the disadvantages of ADUs?
Potential disadvantages of ADUs can include the initial investment cost and the need to adapt your existing yard space. Zoning regulations, though generally supportive, require careful attention to ensure compliance. You also need to consider potential impacts on neighborhood aesthetics.
Also serving nearby: Minneapolis · Bloomington · Rochester · Duluth · Sioux Falls
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of St. Paul — population 303,820; about 5,845 residents per square mile across 52.0 sq mi.
Neighborhoods served in St. Paul: Summit Hill, Cathedral Hill, Highland Park, West 7th, Como — and every surrounding area.
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