ADUs are allowed in DuluthTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Duluth, MN
Is your property eligible for an ADU?
# of Properties
34,206
Owner-occupied
84%
Zoning districts
27
Avg Home Value
$265,319
Median Lot Size
0.16 acres
Avg Income
$82,540
Residential Types:
34,206 housing units
Single Family
83%
Apts (4+ units)
3%
Other
14%
Zoning Districts:
49,978 parcels · 27 districts
R-1
66%(32,910)
R-2
8%(4,125)
RR-1
6%(3,095)
MU-N
5%(2,567)
Other
15%(7,281)
ADU Rules
What can you build in Duluth, MN?
Duluth, MN follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 800 sq ft
- –Maximum size not to exceed the principal dwelling’s total floor area
Detached ADU Size Limits
- –Maximum detached ADU floor area of 800 sq ft
- –Detached ADU floor area may not exceed the principal building’s total floor area
Max Units
- –1 ADU per lot (one-family or two-family dwellings, attached/internal or detached)
- –Not permitted for multifamily principal structures.
Owner Occupancy
- –Owner-occupancy not required.
Parking
- –No off-street parking required for ADUs; exceptions: accessory vacation-dwelling ADUs require parking by bedrooms: before 5/15/2016: 1–2 BR = 1 space; 3–4 BR = 2 spaces; 5+ BR = 3 spaces; after 5/15/2016: 1–2 BR = 1 space; 3 BR = 2 spaces; 4+ BR = spaces equal to bedrooms minus 1.
Rental Restrictions
- –AVDU allowed with interim use permit; 2-29 night stays; occupancy cap: 1 person + 2 per bedroom; permit ends on ownership change or after 6 years; non-transferable; citywide cap applies (Form Districts exempt).
- –Limited AVDU on owner-occupied property; 2-7 night stays; max 21 nights/year; permit non-transferable; ends after 1 year or ownership change.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Minnesota municipalities
Rules change at the town line. Check the municipality your property is actually in.
St. Louis County