Minnesota ADU Laws

Complete 2026 guide to accessory dwelling unit regulations

○Local Control Only

📋Quick Facts

Max Size
800 sq ft
Size Limit
75% of primary
Owner Occupancy
✓ Not required
Parking
Set locally
Approval Process
Varies locally

📜Recent Legislation

Saint Paul Ordinance 23-43 (2023) - Allowed 2 ADUs per single-family dwelling, increased size flexibility

Saint Paul ADU reforms (2022) - Removed owner-occupancy requirement and lot size minimums

Saint Paul citywide ADU allowance (2018) - Expanded from limited geographical area

Saint Paul first ADU allowance (2016) - Initial limited geographical pilot

⚠️Key Requirements & Restrictions

  • •No statewide ADU law - entirely local control
  • •Rules vary dramatically by city and county
  • •Saint Paul allows up to 2 ADUs per single-family dwelling
  • •Minneapolis has ADU allowances but more restrictive than Saint Paul

📖Detailed Analysis

No statewide ADU law - entirely local control. Saint Paul is a national ADU leader with progressive policies evolving since 2016. Major reforms: removed owner-occupancy requirement (2022), removed lot size minimums (2022), allowed 2 ADUs per single-family dwelling (2023). Saint Paul max size: 800 sqft or 75% of main dwelling (whichever greater), 25-foot height limit for detached units. Minneapolis allows ADUs but with more restrictive policies than Saint Paul. Twin Cities metro area generally ADU-friendly but suburban communities vary widely. Minnesota represents strong local innovation without state-level mandate - Saint Paul's progressive approach could serve as model for statewide legislation.

🔗Official Resources

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⚠️ Disclaimer

The information provided on this website is for general informational purposes only and does not constitute legal, financial, or professional advice. ADU laws, regulations, and requirements vary by jurisdiction and change frequently. While we strive to keep this information accurate and up-to-date, we make no representations or warranties of any kind about the completeness, accuracy, reliability, or suitability of this information. Always consult with qualified local professionals, including attorneys, architects, and your local planning department, before making any decisions regarding ADU construction or investment. Use of this information is at your own risk.

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Last updated: February 2026