ADU Rules in Plymouth, Minnesota

Plymouth is a Hennepin County city of about 80,000 west of Minneapolis — one of Minnesota's most affluent suburbs and its seventh-largest city. Plymouth has numerous lakes within city limits and significant corporate employment (UnitedHealth Group, others). Minnesota enacted statewide ADU legislation in 2024.

Minnesota Statewide ADU Law (2024)

Minnesota's 2024 Housing Solutions Act requires cities to allow ADUs by right. Verify how Plymouth has implemented state requirements.

Plymouth Zoning Ordinance

The City of Plymouth Zoning Ordinance governs all land use in city limits.

Permitted ADU Types

Per state law and Plymouth zoning (verify current standards):

• Detached ADUs: In eligible residential zones
• Attached ADUs: With separate entrance
• Interior conversions

Size Limits

Per Plymouth Zoning Ordinance:

• Maximum floor area per zone
• Lot coverage restrictions

Setbacks

Per Plymouth residential zone:

• Rear/Side: Minimum setbacks

Minnesota Shoreland Management Act — Lakes

Critical for Plymouth. The city has many lakes classified as public waters. Properties within 1,000 feet of classified lakes (Medicine Lake, Bass Lake, Schmidt Lake, Parkers Lake, others) are subject to Minnesota's Shoreland Management Act with stricter development standards. Verify shoreland status for any Plymouth property near a lake.

Wetlands

Plymouth has extensive wetlands in addition to lakes. Development near wetlands requires review under Minnesota Rules and may require Wetland Conservation Act permits.

HOA Considerations

Plymouth has numerous planned subdivisions with HOAs. Consult your HOA before applying for permits.

Permit Process

1. Check HOA restrictions: If applicable
2. Verify zoning and state ADU law: Plymouth Community Development Division
3. Shoreland review: If within 1,000 feet of classified lakes or rivers
4. Wetland review: If near wetlands
5. Submit plans: Plymouth Building Division
6. Building permit and inspections
7. CO: Required before occupancy

Contact

City of Plymouth Community Development Division 3400 Plymouth Boulevard, Plymouth, MN 55447 Phone: (763) 509-5400 Website: plymouthmn.gov/planning

Disclaimer: Minnesota enacted statewide ADU legislation in 2024. Shoreland Management Act applies within 1,000 feet of Plymouth's many lakes. Verify current standards before starting any project.