Detached accessory dwelling unit — 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
A detached ADU is a standalone building separate from your main home, like a backyard cottage. These provide the most privacy for you or your tenants since there are no shared walls. You need this if you have a large enough yard to accommodate a separate structure.
Frequently asked in St. Paul
Where can I find accessory dwelling unit services near me in St. Paul?
What does accessory dwelling unit mean in St. Paul?
In St. Paul, an accessory dwelling unit (ADU) means a secondary, independent living space on a single-family lot. It includes its own kitchen, bathroom, and sleeping area. ADUs can be attached to the main house or be a detached structure, like a backyard cottage. They provide flexible housing options for homeowners in St. Paul.
Are there accessory dwelling unit grants in St. Paul?
What are accessory dwelling unit homes in St. Paul like?
Accessory dwelling unit homes in St. Paul are properties that feature an additional, separate living space. This could be a basement apartment, a garage conversion, or a new backyard cottage. These homes offer greater flexibility for residents, whether for extended family or rental income. We help you get quotes for building such units.
What is an ADU unit in St. Paul?
An ADU unit in St. Paul refers to a complete, self-contained living space built in addition to the primary residence on a lot. It contains all the essential components for independent living: a kitchen, bathroom, and bedroom area. These units are designed to comply with St. Paul's zoning and building regulations.
Can I get an affordable ADU in St. Paul?
What is the process for an accessory dwelling unit contractor 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: Summit Hill, Highland Park, Macalester-Groveland, Como Park, Cathedral Hill — and every surrounding area.
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