Accessory Dwelling Units (ADU)

What Are ADUs?

Accessory Dwelling Unit (ADU)
A self-contained living space located on the same lot as a single-family home, duplex, triplex, townhome, or other residential structure.

Attached ADU
An ADU that is integrated within or physically attached to a single-family home, duplex, triplex, townhome, or other residential structure.

Detached ADU
An ADU that is housed in a separate, stand-alone building on the same property as a single-family home, duplex, triplex, townhome, or other residential structure.

1000+

+150%

Approx. Value Add to Homes with ADU

ADU's Permitted in 2024 in WA