Everything homeowners need to know about building an accessory dwelling unit in Minneapolis - size limits, setbacks, permits, and the recent changes that made it easier than ever.
| ADU type | Max size | Max height | Notes |
|---|---|---|---|
| Detached (new build or garage conversion) | 1,000 sq ft or 50% of the primary dwelling's finished floor area, whichever is smaller | 20 ft | Typically must sit behind the primary dwelling |
| Attached / internal (basement, above-garage addition) | Sized within the primary structure - no separate detached-style cap | Same as primary structure | Common approach for basement or above-garage conversions |
Allowed zoning districts: lots zoned for one- and two-family residential use, citywide. Confirm your parcel's zoning district with CPED.
| Setbacks | 3 ft from side and rear property lines; 5 ft from an alley for above-garage units |
| Parking | No additional off-street parking required for the ADU itself |
| Units per lot | 1 ADU permitted in addition to the primary dwelling |
| Owner-occupancy | Not required citywide as of a recent zoning amendment (previously required). Some internal ADUs may still require a recorded covenant - confirm with CPED. |
| Building code | Must meet 2020 Minnesota Residential Code dwelling unit standards |
| Rental license | A separate city rental license is required if the ADU or the primary home is rented out |
Confirm zoning eligibility for your specific lot with CPED before designing.
File your site plan with the ADU zoning review; the administrative fee is typically around $325.
The city reviews for zoning and building code compliance. Incomplete applications get a deficiency notice within 15 business days.
Once zoning is approved, pull your building permit and begin construction.
Applications left incomplete for 30+ days are typically withdrawn, and decisions can be appealed within 10 calendar days. Fees and timelines are approximate - confirm current figures with CPED.