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Mill Creek planners review state 'middle housing' rules; staff to propose code amendments
Summary
At a study session the Mill Creek Planning Commission heard a staff presentation on state middle-housing laws (HB 1110, HB 1337, SB 5258). Staff will draft zoning and ADU code changes next month; if the city does not adopt its own amendments by July 1 the state Department of Commerce model code will apply.
At a study session, Planning Department staff reviewed recent state laws that change how cities must treat “middle housing” and described the code amendments staff will bring to the Planning Commission next month.
Staff said the state 2023 laws—HB 1110, HB 1337 and SB 5258—require changes to local code for housing types between two and six units (duplexes through six-plexes), accessory dwelling units (ADUs) and unit-lot subdivision. Staff said Mill Creek falls into Tier 3 under HB 1110 because the city’s population is under 25,000 and therefore has fewer mandatory changes than larger cities, but still must adopt minimum standards.
The presentation summarized required changes: allow at least two dwelling units per lot; convert middle-housing design review from review-board review to administrative design review; loosen parking requirements near frequent-transit stops; allow…
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