Accessory dwelling unit construction 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 cost to build an ADU varies based on whether you are converting an existing garage or building a new detached structure from the ground up. Factors like foundation work, utility extensions, high-end finishes, and site access all influence the final total. Exact pricing confirmed free on the call.
Frequently asked in St. Paul
What are the advantages of building an accessory dwelling unit in St. Paul?
How much does accessory dwelling unit construction cost in St. Paul?
What are the permit requirements for an ADU in St. Paul?
What is the difference between a backyard ADU and an attached ADU in St. Paul?
How do I find a qualified accessory dwelling unit contractor in St. Paul?
Are there financing options available for ADUs in St. Paul?
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: Highland Park, West 7th, Summit Hill, Cathedral Hill, Como — and every surrounding area.
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