Accessory Structures in Duluth, MN (2026)
2 verified accessory structures rules for Duluth, Minnesota, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Duluth allows one accessory dwelling unit per lot under Unified Development Chapter § 50-20.5.E, capped at 800 square feet and no taller than the main house or 20 feet, whichever is greater. Only the property owner may apply, and no variances are ever granted.
Duluth Accessory Dwelling Unit Rules
Some RestrictionsDuluth Legislative Code § 50-20.5.E
E. Accessory dwelling unit. ... An accessory dwelling unit may be created within, or detached from, any one-family or two-family dwelling, as a subordinate use, in those districts shown in Table 50-19.8, provided the following standards are met: 1. Only one accessory dwelling unit may be created per lot; 2. No variances shall be granted for an accessory dwelling unit; 3. Only the property owner...
Shed & Carport Rules
In the City of Duluth, a shed or other accessory structure cannot exceed 20 feet in height, cannot cover more than 30 percent of the rear yard by itself, and all accessory structures on the lot together cannot occupy more than 60 percent of the rear yard, under the Unified Development Chapter's dimensional standards.
Duluth Shed Height and Coverage Limits
Some RestrictionsDuluth Legislative Code § 50-21.2.D
D. Accessory structures. Accessory dwelling units shall not exceed the height of the principal residential structure or 20 feet, whichever is greater. All other accessory structures shall not exceed 20 feet in height. Any accessory structure shall not occupy more than 30 percent of the rear yard area. All accessory structures on a lot shall not occupy more than 60 percent of the rear yard area....
Looking for St. Louis County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Duluth city rules.
Accessory Structures in St. Louis County →