ADUs are allowed in BismarckTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Bismarck, ND
Is your property eligible for an ADU?
# of Properties
21,864
Owner-occupied
82%
Zoning districts
20
Avg Home Value
$337,026
Median Lot Size
0.21 acres
Avg Income
$97,123
Residential Types:
21,864 housing units
Residential
100%
Zoning Districts:
27,028 parcels · 20 districts
R5
43%(11,547)
R10
25%(6,858)
RM30
6%(1,722)
MA
6%(1,595)
Other
20%(5,306)
ADU Rules
What can you build in Bismarck, ND?
Bismarck, ND follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Special Permit
- –Detached ADU: Special Permit
Interior / Attached ADU Size Limits
- –Maximum size is the lesser of 800 sq ft or 40% of the principal structure’s gross floor area (garage excluded).
Detached ADU Size Limits
- –Maximum size of 800 sq ft on lots 5 acres or less, or 1,200 sq ft on larger lots.
Max Units
- –1 ADU per single-family lot; none specified for duplex/two-family, multifamily, or JADU
Owner Occupancy
- –Owner must occupy the principal or ADU for more than six months.
Parking
- –1 off-street space per ADU (in addition to principal); no max; exceptions: infeasible cases may use on-street/other methods; one off-street space may be credited for each 25 ft of usable adjacent local-street frontage.
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 North Dakota municipalities
Rules change at the town line. Check the municipality your property is actually in.
Burleigh County