Everything homeowners ask about building an ADU in Minneapolis — answered with 2026 data.
Yes, ADUs are allowed in All interior residential districts permitting single- or two-family dwellings in Minneapolis, MN. The maximum size for a detached ADU is 1,300 sq ft or 16% of lot area (whichever greater); max 1,600 sq ft or size of primary dwelling (whichever less). Attached ADUs can be up to 800 sq ft. Minneapolis has an ADU-friendliness score of 8/10. Check our full Minneapolis ADU rules page for complete zoning details.
ADU construction in Minneapolis typically costs $140,000-$280,000. The cost per square foot averages $130-$270. Garage conversions are more affordable at $70,000-$160,000, while prefab ADUs cost $100,000-$230,000. Permit fees add $1,800-$3,000 to your budget. See our detailed Minneapolis ADU cost guide.
Detached ADUs in Minneapolis can be up to 1,300 sq ft or 16% of lot area (whichever greater); max 1,600 sq ft or size of primary dwelling (whichever less). Attached ADUs are limited to 800 sq ft. Junior ADUs (JADUs) have a cap of 800 sq ft (internal ADU — within existing structure). Maximum height is 16 ft (20-21 ft if exterior materials match principal structure). You are allowed up to 1 ADU per zoning lot on a qualifying lot.
Rear setback: 3 ft (5 ft from alleys for above-garage ADUs). Side setback: 3 ft. Front setback: Must meet primary dwelling front setback (ADUs placed in rear yard). Note that garage conversions may be exempt from setback requirements if the existing structure is already within the setback area.
No minimum off-street parking required. Many cities and states have been relaxing ADU parking requirements in recent years. In California, no additional parking is required for ADUs near transit.
Not required (removed by ordinance amendment, effective 2020; applies to both principal and ADU). Note that owner-occupancy rules vary by state law — California and several other states have eliminated this requirement for standard ADUs.
The ADU permit review timeline in Minneapolis is typically 40-60 days. The plan check process takes approximately 2-3 weeks. Pre-approved plans availability: Available.
Average ADU rental income in Minneapolis: 1-bedroom units rent for $1,350-$1,800/mo/month, 2-bedroom units for $1,700-$2,400/mo/month. Short-term rentals: Permitted with registration. Expected ROI: 7-10% annual return.
The minimum lot size for an ADU in Minneapolis is No ADU-specific minimum; lot must support permitted single- or two-family dwelling. This applies to detached ADUs — garage conversions and JADUs may have different or no lot size requirements.
Garage conversions are one of the most popular and affordable ADU options. In Minneapolis, a garage conversion typically costs $70,000-$160,000. The key advantages are lower cost (no foundation work), potential setback exemptions, and faster permitting. Read our complete garage conversion guide.