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Washington State overlays

All 8 tracked preemption laws for Washington.

Overview

All tracked preemption laws for Washington. Click any law for its trigger predicate, preempted fields, and source citation.

Laws tracked
8
Preempted fields
35
Required city attrs
7
Last reviewed
2026-04-19
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Tracked laws

Washington HB 1110 — Middle Housing (Tier 1: cities >=75,000)6 fields
Effective
2024-07-01
Authority
state · scope: state:WA
ID
WA_HB1110_MIDDLE_HOUSING_TIER1_2024
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Washington HB 1110 — Middle Housing (Tier 2: cities 25,000-75,000)6 fields
Effective
2024-07-01
Authority
state · scope: state:WA
ID
WA_HB1110_MIDDLE_HOUSING_TIER2_2024
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Washington HB 1110 — Middle Housing (Tier 3: small cities in Tier 1 UGA)3 fields
Effective
2024-07-01
Authority
state · scope: state:WA
ID
WA_HB1110_MIDDLE_HOUSING_TIER3_2024
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Washington SB 5184 — Lot Splitting for Housing Capacity2 fields
Effective
2024-07-01
Authority
state · scope: state:WA
ID
WA_SB5184_LOT_SPLITTING_2024
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Washington SB 5290 — Local Permit Review Timelines4 fields
Effective
2024-01-01
Authority
state · scope: state:WA
ID
WA_SB5290_PERMIT_TIMELINES_2024
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Washington HB 1337 — Accessory Dwelling Units Statewide7 fields
Effective
2023-07-23
Authority
state · scope: state:WA
ID
WA_HB1337_ADU_STATEWIDE_2023
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Washington E2SHB 1220 — Comprehensive Plan Housing Obligations5 fields
Effective
2021-07-25
Authority
state · scope: state:WA
ID
WA_HB1220_HOUSING_ELEMENT_2021
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Washington Growth Management Act — Zoning for Growth Targets2 fields
Effective
1990-07-01
Authority
state · scope: state:WA
ID
WA_GMA_RCW_36_70A
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Required city attributes

Required city attributes

The evaluator needs these city-level facts present to resolve whether a given law's predicate fires.

  • population
  • county_population
  • growth_management_act_tier
  • within_urban_growth_area_of_tier1
  • transit_proximity_flags.has_qualifying_major_transit_stop
  • transit_service_provider_present
  • housing_element_compliance_gma