An "accessory dwelling unit" or "ADU" is an additional dwelling unit either in or added to an existing single-family detached dwelling, duplex, triplex, townhouse, or in a separate structure on the same lot as the primary dwelling unit. It is a complete, independent living facility with provisions for cooking, eating, sanitation, sleeping and entry separate from that of the primary dwelling unit. ADUs are also commonly known as "mother-in-law" units, backyard cottages, or carriage houses.
The City recently updated its regulations for ADUs. See
Ordinance 1737 and
BLMC 18.22.090 for additional information.
A covenant is required to be recorded against the property prior to final occupancy of the ADU. City staff will prepare the covenant for your review and signature. The applicant is solely responsible for recording the covenant with the
Pierce County Auditor and providing the recording number to the City.