ADU rules in Vancouver, WA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Vancouver allows up to two ADUs per parcel in all residential zones. ADUs may not exceed 800 sq ft or 50% of the main home's square footage, whichever is less. No additional parking is required.
Under VMC 20.810, Vancouver allows Accessory Dwelling Units in all residential zones (R-2 through R-35). Up to two ADUs may be created per parcel. ADUs may be attached, detached, or internal conversions. Maximum size is 800 sq ft or 50% of the main home (excluding garage), whichever is less. ADUs must include sleeping, sanitation, and kitchen facilities. No additional on-site parking is required. Building permits are required. Washington state law (HB 1337) expanded ADU allowances statewide.
Unpermitted ADUs must be brought into compliance. Construction without permits results in code violations.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Vancouver, WA
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Vancouver, WA
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Vancouver, WA
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Vancouver, WA
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See how Vancouver's adu rules rules stack up against other locations.
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