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Yelm planning commission adopts Title 18 updates to ease housing rules and clarify design standards
Summary
The Yelm Planning Commission voted June 16 to adopt multiple amendments to Title 18, including new ADU design standards, reduced rear-yard setbacks, a higher minimum density in R6, allowance for hammerhead turnarounds, and a reduction in C3 minimum lot area to encourage smaller commercial development.
The Yelm Planning Commission adopted a package of amendments to Title 18 of the city’s Unified Development Code on June 16, approving changes staff said are intended to facilitate housing options, clarify design rules and allow greater flexibility for constrained parcels.
Staff outlined several specific changes: establish design standards for accessory dwelling units (ADUs) on residential and some non-residential lots; reduce rear-yard setbacks in residential zones from 25 feet to 20 feet; reduce side-yard setbacks to five feet for certain residential buildings in R16 where the buildings are not multifamily; increase the minimum density in the R6 zone from three units per acre to four; allow hammerhead turnarounds as an approved alternative to cul-de-sacs for emergency access (subject to approval by the public services director and the fire marshal); revise minimum lot-area requirements in the C3 zone to align with the smaller-scale C2 zone; and clarify setback treatment for ground-oriented residential versus multifamily and mixed-use buildings.
On hammerheads, staff described the configuration as an emergency-vehicle turnaround used when a cul-de-sac is impractical. "A hammerhead is essentially a dead-end turnaround," staff said, explaining the city would require special findings and dual staff approvals before allowing the alternative in place of a cul-de-sac. Staff also told commissioners the proposed change to C3 aims to encourage smaller commercial pads near existing retail corridors and avoid reserving large parcels that are hard to develop under the current minimums.
Commissioners asked technical questions about the ground-oriented residential definition, setbacks and manufactured-housing-community provisions in R6. Staff said definitions and design standards are attached to the code amendments and agreed to clarify certain drafting points (including a request to restore a 25-foot rear-yard setback in one reading where a 20-foot figure had been misread).
After a public-comment period that produced no substantive objections, a motion to accept the Title 18 amendments with minor typos noted passed. The commission also announced staff has purchased stock ADU plans that will be offered free on the city website to reduce design costs and that the department welcomed a new planner, Riley, to the team.
The amendments are now adopted into the Unified Development Code and will apply to future permit and design reviews; staff said they expect to roll out implementation details including design guidelines and revised application materials in coming weeks.
