Accessory dwelling units—Definitions.
(1) "Accessory dwelling unit" means a dwelling unit located on the same lot as a single-family housing unit, duplex, triplex, townhome, or other housing unit.
(2) "Attached accessory dwelling unit" means an accessory dwelling unit located within or attached to a single-family housing unit, duplex, triplex, townhome, or other housing unit.
(3) "City" means any city, code city, and town located in a county planning under RCW
36.70A.040.
(4) "County" means any county planning under RCW
36.70A.040.
(5) "Detached accessory dwelling unit" means an accessory dwelling unit that consists partly or entirely of a building that is separate and detached from a single-family housing unit, duplex, triplex, townhome, or other housing unit and is on the same property.
(6) "Dwelling unit" means a residential living unit that provides complete independent living facilities for one or more persons and that includes permanent provisions for living, sleeping, eating, cooking, and sanitation.
(7) "Gross floor area" means the interior habitable area of a dwelling unit including basements and attics but not including a garage or accessory structure.
(8) "Major transit stop" means:
(a) A stop on a high capacity transportation system funded or expanded under the provisions of chapter
81.104 RCW;
(b) Commuter rail stops;
(c) Stops on rail or fixed guideway systems, including transitways;
(d) Stops on bus rapid transit routes or routes that run on high occupancy vehicle lanes; or
(e) Stops for a bus or other transit mode providing actual fixed route service at intervals of at least fifteen minutes for at least five hours during the peak hours of operation on weekdays.
(9) "Owner" means any person who has at least 50 percent ownership in a property on which an accessory dwelling unit is located.
(10) "Principal unit" means the single-family housing unit, duplex, triplex, townhome, or other housing unit located on the same lot as an accessory dwelling unit.
(11) "Short-term rental" means a lodging use, that is not a hotel or motel or bed and breakfast, in which a dwelling unit, or portion thereof, is offered or provided to a guest by a short-term rental operator for a fee for fewer than 30 consecutive nights.
NOTES:
Findings—Intent—2023 c 334: See note following RCW
36.70A.680.
Findings—Intent—2020 c 217: "(1) The legislature makes the following findings:
(a) Washington state is experiencing a housing affordability crisis. Many communities across the state are in need of more housing for renters, across the income spectrum. Accessory dwelling units are frequently rented at below market rate, providing additional affordable housing options for renters.
(b) Accessory dwelling units are often occupied by tenants who pay no rent at all; among these tenants are grandparents, adult children, family members with disabilities, friends going through life transitions, and community members in need. Accessory dwelling units meet the needs of these people who might otherwise require scarce subsidized housing space and resources.
(c) Accessory dwelling units can meet the needs of Washington's growing senior population, making it possible for this population to age in their communities by offering senior-friendly housing, which prioritizes physical accessibility, in walkable communities near amenities essential to successful aging in place, including transit and grocery stores, without requiring costly renovations of existing housing stock.
(d) Homeowners who add an accessory dwelling unit may benefit from added income and an increased sense of security.
(e) Siting accessory dwelling units near transit hubs and near public amenities can help to reduce greenhouse gas emissions by increasing walkability, shortening household commutes, and limiting sprawl.
(2) The legislature intends to promote and encourage the creation of accessory dwelling units as a means to address the need for additional affordable housing options." [
2020 c 217 § 1.]
