ADU rules in Tacoma, WA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Tacoma allows two ADUs per lot in zoning districts that permit residential development. Both attached and detached ADUs (DADUs) are permitted. Living area is limited to 1,000 square feet. No parking is required for ADUs. Tacoma offers pre-approved DADU plans.
Tacoma is one of the most ADU-friendly cities in Washington. Two ADUs are allowed per lot regardless of lot size, in any zone that permits residential use. The living area is capped at 1,000 square feet excluding non-living areas. No additional parking is required. Owner occupancy is not required under HB 1337. Tacoma offers pre-approved detached ADU (DADU) plans to streamline the permitting process. ADUs in environmentally sensitive areas must comply with additional environmental review.
Unpermitted ADUs face code enforcement. Tacoma encourages legalization of existing unpermitted ADUs through its permitting program.
Tacoma, WA
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Side-by-side rule comparisons with other cities in this county.
See how other cities in this county handle adu rules.
See how Tacoma's adu rules rules stack up against other locations.
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