Washington HB 1110 — Middle Housing (Tier 3: small cities in Tier 1 UGA) (WA)
Tracked preemption from the Washington overlay bundle.
Overview
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Effective
2024-07-01
Sunset
—
Authority
state
Scope
state:WA
Other Washington preemptions
Washington HB 1110 — Middle Housing (Tier 1: cities >=75,000)Washington HB 1110 — Middle Housing (Tier 2: cities 25,000-75,000)Washington SB 5184 — Lot Splitting for Housing CapacityWashington SB 5290 — Local Permit Review TimelinesWashington HB 1337 — Accessory Dwelling Units StatewideWashington E2SHB 1220 — Comprehensive Plan Housing ObligationsWashington Growth Management Act — Zoning for Growth Targets
Primary-source summary
HB 1110 — Middle Housing (effective July 1, 2024)Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
AND
city.population<25000city.within_urban_growth_area_of_tier1==Trueparcel.base_zone_category==res_sf
Preempted fields
3 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
base_districts[category=res_sf].max_units_per_lot | floor_at | 2 | 2 units per lot by-right in SF zones for Tier 3 cities |
base_districts[category=res_sf].min_lot_size_sf | cap_at | base SF lot minimum | |
review_type | waive_discretionary | — |
Citation
Authority source
WA HB 1110 (2023) / RCW 36.70A.635
§ RCW 36.70A.635
Research notes
Tier 3 applies to cities <25,000 located within the urban growth area (UGA) of a Tier 1 (>=75,000) city. Cities outside any Tier 1 UGA are not covered by HB 1110.