ADU rules in North Dakota
Representative cities: Fargo, Bismarck.
ADU permit rule
Permit requiredGenerally allowedcity authority
Fee basis
Set by local jurisdiction
Typical timeline
Varies
Setback
—
Area threshold
No statewide ADU mandate; an ADU is a dwelling and requires a building permit where codes are enforced.
Exempt if
None — an accessory dwelling unit (garage apartment, in-law suite) always requires a building permit under the North Dakota State Building Code.
Go / no-go
allowed
North Dakota has no statewide by-right ADU law; allowance is set by local zoning. Verify with your city/county building department whether ADUs are permitted in your zone.
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Frequently asked questions
Do I need a permit to build an ADU in North Dakota?
Per North Dakota rules, an ADU is "yes" for a permit and the authority is "city". North Dakota has no statewide by-right ADU law; allowance is set by local zoning. Verify with your city/county building department whether ADUs are permitted in your zone. Always confirm with the issuing building department.
How big can an ADU be in North Dakota?
Area threshold: No statewide ADU mandate; an ADU is a dwelling and requires a building permit where codes are enforced.
What are the ADU setbacks in North Dakota?
Setback rules vary by city in North Dakota; confirm with the local planning or building department.
How much does an ADU permit cost in North Dakota?
Permit fees are set locally in North Dakota. See the official source on this page.