ADU rules in Lynnwood, WA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
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.
LMC 21.42.110 currently requires owner occupancy and one off-street parking space. HB 1337 mandates compliance by mid-2025 for GMA jurisdictions. Studio/1-BR ADUs require one 9×17.5 ft parking space; 2-BR requires two. No ADU may be sold separately or condominiumized without full subdivision compliance.
Unpermitted ADUs face stop-work orders and removal or legalization requirements. Fines of $500–$2,000 apply for unpermitted construction. Properties with illegal ADUs may face title issues at sale.
Lynnwood, WA
Lynnwood does not have a local airport. Paine Field (PAE) in Everett is approximately 5 miles northeast. Aircraft noise is regulated federally by the FAA. No...
Lynnwood, WA
Barking dogs that cause a noise disturbance are subject to LMC §10.12.300 (noises prohibited). Noise audible at 50 feet from the source is prima facie eviden...
Lynnwood, WA
Construction noise in Lynnwood is limited to Monday through Friday between 7 a.m. and 6 p.m. under LMC §10.12.300. Weekend construction is prohibited unless ...
Lynnwood, WA
Lynnwood noise regulations are governed by LMC Ch. 10.12, which adopts WAC 173-60 Environmental Designation for Noise Abatement (EDNA) standards. Quiet hours...
Lynnwood, WA
Abandoned vehicles on public streets are reported to the Lynnwood Police Department or Snohomish County Sheriff. Inoperable vehicles on private property are ...
Lynnwood, WA
Street parking in Lynnwood is regulated under LMC Title 10 (traffic/vehicles) and adopts applicable Washington State vehicle codes (RCW 46). Contact the Lynn...
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