Accessory Structures in St. Michael, MN: What Residents Actually Need to Know

If you live in St. Michael or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. St. Michael has 2 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

Shed Rules

St. Michael accessory structures must be constructed of durable, finished materials compatible in color to the principal structure. Structures over 120 sq ft must also be compatible in design, roof style, roof pitch, and exterior finish. Structures over 1,200 sq ft require additional setbacks (1 ft per 100 sq ft over 1,200).

Key details: Building Permit: Required >200 sq ft (state). Match Principal Structure: Required >120 sq ft. Setback Bonus: +1 ft / 100 sq ft over 1,200 sq ft.

Building without required permit or compatibility approval is a zoning misdemeanor under Sec. 10.99 — up to $1,000 / 90 days. The city may require structures to be re-clad or removed.

ADU Rules

St. Michael's zoning code does not expressly permit accessory dwelling units (ADUs) in standard residential districts. Second residences require a conditional use permit and review against Chapter 155 zoning standards.

Key details: Code Chapter: Chapter 155. ADU Status: Not expressly permitted; CUP required. Opt-Out: Temp health care dwellings (Ord. 1605).

Adding an unpermitted second dwelling is a zoning misdemeanor under Sec. 10.99 — up to $1,000 / 90 days. The city may order the unit decommissioned and the kitchen or utility hookups removed.

This is not one of those rules that cities tend to ignore. St. Michael actively enforces its adu rules requirements.

The Bottom Line

St. Michael's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming St. Michael is broadly strict or permissive.

Keep in mind that St. Michael can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.