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Duvall council reviews state-mandated ADU changes, debates incentives and infrastructure impacts
Summary
City staff outlined changes required by new state ADU law and proposed incentives to encourage single-story accessory dwelling units; council members pressed staff on utility metering, stormwater impacts, parking and tree removal safeguards.
Duvall — City planners told the Duvall City Council that state law requires the city to allow accessory dwelling units (ADUs) on lots that allow single-family homes, and staff presented draft local rules and several incentive options for council feedback.
The council heard that under the law the city must allow up to two ADUs per lot in zones that allow single-family homes, permit up to 1,000 square feet by default, allow attached or detached ADUs, and cannot require owner-occupancy. Staff said the city may set some incentives and conditions — for example, allowing a modest increase in ADU size up to 1,200 square feet, reduced rear/side setbacks, and limited impervious-surface…
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