Sequim clarifies ADU rules: setbacks, alley exception, parking near transit

Aug 5, 2026

Staff proposed aligning ADU setbacks with accessory-structure rules (allowing setbacks adjacent to alleys unless the alley is 'routinely plowed'), clarified conversions versus new construction, and retained a one-off parking requirement outside a 0.5-mile transit radius.

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Staff reviewed accessory dwelling unit (ADU) rules carried into the Title 18 draft from prior code with clarifying housekeeping edits to setbacks, conversions, and parking. Presenter (S3) said the city will allow ADUs adjacent to alleys where the city engineer determines the alley is not one that is 'routinely plowed,' noting the statute's unspecified "routinely" standard. "So right now, my I'm I'm going to propose that we just allow, ADUs to be located on lot lines adjacent to alleys," the presenter said (S3).

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