Marysville, WA Accessory Structures: Garage Conversions (2026)

Existing structures, including but not limited to detached garages, may be converted to accessory dwelling units, even if they do not comply with current code requirements for setbacks or building coverage. 5 Detached accessory dwelling units may be built at a lot line, if the lot line abuts a public alley. 6 No parking areas other than driveways may be in front yards. When the property abuts an alley, parking areas must be accessed from the alley.

(2) The architectural character of the single-family dwelling shall be preserved. Exterior materials, roof form, and window spacing and proportions shall match that of the existing single-family dwelling. In no case shall a detached accessory dwelling unit have axles or be on a chassis.

(3) The city may not prohibit the sale or other conveyance of a condominium unit independently of the principal structure solely on the grounds that the condominium unit was originally built as an accessory dwelling unit.

(4) The provisions of this section do not apply to portions of lots designated with critical areas or their buffers as designated in RCW 36.70A.060, or to lots in a watershed serving a reservoir for potable water if that watershed is or was listed, as of July 23, 2023, as impaired or threatened under section 303(d) of the Federal Clean Water Act (33 U.S.C. Section 1313(d)).

(5)