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Yelm planners briefed on state ADU requirements; members flag parking and enforcement questions
Summary
City planning staff outlined state-mandated changes that require allowing up to two accessory dwelling units (ADUs) per residential lot and limit local controls. Commissioners asked how local code will handle parking, preapproved plans and enforcement of a short-term rental restriction tied to the preapproved-plan program.
City planning staff presented draft local rules to implement new state requirements for accessory dwelling units (ADUs) at the Yelm Planning Commission meeting on Tuesday.
The presenter said the state requires cities to allow up to two ADUs per residential lot, and limits local restrictions on design, owner-occupancy and parking. "We're required to allow 2 ADUs per residential lot," the presenter said, adding that municipalities "may not require ADUs to be smaller than 1,000 gross square feet" and cannot condition permitting on street improvements. He also described provisions limiting impact fees to no more than 50% of those assessed to the principal unit and waiving on-site parking requirements for ADUs within a half-mile of a major transit stop.
Why it matters: ADU changes are intended to increase the supply of long-term rental housing, reduce development barriers and provide homeowners with options for additional income or multi‑generational living. The commission was told the city must adopt implementing code by a state deadline in the coming months.
During questions, a commissioner pressed staff on enforcement of a proposed rule that would bar short-term rentals for ADUs built using the city's preapproved ADU plans. "This seems like that would be an enforcement issue," the commissioner said, asking whether use of the preapproved plan would be tracked on the record. The presenter said enforcement mechanics were not yet finalized and that staff would consult the Municipal Research and Services Center (MRSC) and clarify how tagging or recordation would work.
Commissioners and attendees also asked for clarity on parking counts. The presenter said the state language was ambiguous and staff would seek clarification on whether the single off-street parking space for ADUs applies only to the ADU or to the parcel as a whole.
A community member, supporting preapproved plans, urged the commission to advertise the program widely. The presenter noted the city is partnering with neighboring jurisdictions to create several preapproved plan templates and expects to post them on the city website.
Next steps: Staff plans to return draft code language for the commission to review and to develop an outreach plan and preapproved-plan templates. No formal vote was taken at the meeting.
