Accessory Structures in Kirkland, WA (2026)
5 verified accessory structures rules for Kirkland, Washington, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Kirkland allows one attached ADU and one detached DADU on most single-family lots under KZC Chapter 115, aligned with WA HB 1337 requirements; owner occupancy is not required and many parking minimums have been removed.
Kirkland ADU and DADU Regulations
Few RestrictionsShed Rules
Kirkland sheds under 200 square feet typically do not need a building permit under WA IRC R105.2, though zoning setbacks, critical area rules, and electrical permits still apply.
Kirkland Shed Permit Rules
Few RestrictionsGarage Conversions
Converting a Kirkland garage to living space needs a building permit and IRC habitable-space standards; replacement parking may apply unless transit-proximity waivers under WA HB 1337 exempt the unit.
Kirkland Garage Conversion Rules
Some RestrictionsCarport Rules
Carports in Kirkland are accessory structures requiring a building permit when exceeding 200 square feet under WA IRC R105.2; zoning setbacks, impervious surface limits, and shoreline rules apply regardless of size.
Kirkland Carport Permit Rules
Some RestrictionsTiny Homes
Tiny homes on foundations are allowed in Kirkland as DADUs under KZC Chapter 115 subject to IRC Appendix Q size minimums; tiny homes on wheels are treated as RVs and cannot be used as permanent dwellings.
Kirkland Tiny Home Rules
Some RestrictionsLooking for King County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Kirkland city rules.
Accessory Structures in King County →