ADU Rules: Everett vs Lynnwood
How do adu rules rules compare between Everett, WA and Lynnwood, WA?
Everett has fewer restrictions than Lynnwood.
Everett, WA
Snohomish County
Everett allows two ADUs per single-family lot per HB 1337. As the Snohomish County seat, Everett prioritizes affordable housing strategies including ADU development near transit and Boeing employment centers.
View full Everett rules →Lynnwood, WA
Snohomish County
Washington State HB 1337 (2023) requires Lynnwood to allow up to 2 ADUs per single-family lot. Detached ADUs in Lynnwood can be up to 1,200 sq ft and 16 ft tall; above-garage ADUs may reach 18–20 ft. No owner-occupancy requirement under HB 1337 (effective for Snohomish County cities ~May 31, 2025). Building permit required.
View full Lynnwood rules →Key Facts Comparison
| Fact | Everett | Lynnwood |
|---|---|---|
| ADUs Allowed | 2 per lot (HB 1337) | - |
| Max Size | 1,000 sq ft | - |
| Transit | Sounder, Swift BRT | - |
| Housing Plan | ADUs prioritized | - |
| State Mandate | - | HB 1337 (2023) — RCW 36.70A.680 |
| Max Detached ADU | - | 1,200 sq ft, 16 ft tall |
| Above-Garage ADU | - | Up to 18–20 ft |
| No Owner-Occupancy | - | Required (HB 1337 preempts) |
Highlighted rows indicate differences between cities.
Everett FAQ
Can I build an ADU in Everett?
Yes. Two ADUs per single-family lot. No parking required near Everett Station and Swift BRT routes.
Do I need to live on-site?
No. Owner-occupancy cannot be required under HB 1337.
Lynnwood FAQ
Can I build an ADU on my property in Lynnwood?
Washington State HB 1337 (2023) requires Lynnwood to allow up to 2 ADUs per single-family lot. Detached ADUs in Lynnwood can be up to 1,200 sq ft and 16 ft tall; above-garage ADUs may reach 18–20 ft. No owner-occupancy requirement under HB 1337 (effective for Snohomish County cities ~May 31,...
What are the size limits for an accessory dwelling unit in Lynnwood?
State Mandate: HB 1337 (2023) — RCW 36.70A.680. Max Detached ADU: 1,200 sq ft, 16 ft tall. Above-Garage ADU: Up to 18–20 ft. No Owner-Occupancy: Required (HB 1337 preempts).
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