ADU rules, city by city.
18 cities and three counties across Puget Sound. Same template on every page, so you can compare one city against the next.
EVERY CITY BELOW MUST ALLOW AT LEAST
2 ADUs per lot
1,000 SF max size or more
24 ft detached height
No owner-occupancy rule
No parking near major transit
Washington ADU law →
PUGET SOUND · SCHEMATIC
18 / 18
47.8°N
47.6°N
47.4°N
PUGET SOUND
KING COUNTY · SEATTLESeattle
Read the rules →
#CITYCOUNTYREGIONPAGE
01
Seattle
King
SEATTLE
Rules →
02
Bellevue
King
EASTSIDE
Rules →
03
Redmond
King
EASTSIDE
Rules →
04
Kirkland
King
EASTSIDE
Rules →
05
Sammamish
King
EASTSIDE
Rules →
06
Issaquah
King
EASTSIDE
Rules →
07
Mercer Island
King
EASTSIDE
Rules →
08
Bothell
King
EASTSIDE
Rules →
09
Shoreline
King
NORTH
Rules →
10
Lynnwood
Snohomish
NORTH
Rules →
11
Edmonds
Snohomish
NORTH
Rules →
12
Everett
Snohomish
NORTH
Rules →
13
Renton
King
SOUTH KING
Rules →
14
Burien
King
SOUTH KING
Rules →
15
Kent
King
SOUTH KING
Rules →
16
Federal Way
King
SOUTH KING
Rules →
17
Auburn
King
SOUTH KING
Rules →
18
Tacoma
Pierce
PIERCE
Rules →
PUGET SOUND · SCHEMATIC
{{shown}} / 18
47.8°N
47.6°N
47.4°N
PUGET SOUND
{{active.county}} · {{active.r}}{{active.n}}
Read the rules →
#CITYCOUNTYREGIONPAGE
No city matches. Unincorporated areas are covered by the county pages below.
§UNINCORPORATED AREAS
Outside city limits? Your county sets the rules.
19
King County
Unincorporated areas such as White Center, Skyway and parts of the Eastside plateau.
Rules →
20
Snohomish County
Unincorporated areas around Mill Creek, Lake Stevens and the county’s urban growth areas.
Rules →
21
Pierce County
Unincorporated areas such as Spanaway, Parkland and Frederickson.
Rules →