Growth Management Act.  The Growth Management Act (GMA) is the comprehensive land use planning framework for counties and cities in Washington.  The GMA sets forth three broad planning obligations for those counties and cities who plan fully under the GMA:  the county legislative authority must adopt a countywide planning policy; the county, and the cities within the county, must adopt comprehensive plans and designate critical areas, agricultural lands, forestlands, and mineral resource lands, and adopt development regulations accordingly; and the county must designate and take other actions related to urban growth areas (UGAs).

Urban Growth Areas.  Counties that fully plan under the GMA must designate UGAs, areas within which urban growth must be encouraged and outside of which growth may occur only if it is not urban in nature.  Planning jurisdictions must include within their UGAs sufficient areas and densities to accommodate projected urban growth for the succeeding 20-year period.  In addition, cities must include sufficient areas to accommodate the broad range of needs and uses that will accompany the projected urban growth, including, as appropriate, medical, governmental, institutional, commercial, service, retail, and other nonresidential uses.

Property Tax - Revenue.  Under most circumstances, the levy for a taxing district in any year must be set so that the regular property taxes payable in the following year do not exceed the limit factor multiplied by the amount of regular property taxes lawfully levied for such district in the highest of the three most recent years in which such taxes were levied for such district plus an additional dollar amount calculated by multiplying the regular property tax levy rate of that district for the preceding year by the increase in assessed value in that district resulting from:

• new construction;
• increases in assessed value due to construction of wind turbine, solar, biomass, and geothermal facilities, if such facilities generate electricity and the property is not included elsewhere under this section for purposes of providing an additional dollar amount—the property may be classified as real or personal property;
• improvements to property; and
• any increase in the assessed value of state-assessed property.

The bill as referred to committee not considered.

The levy for a taxing district in any year must be set so that the regular property taxes payable in the following year do not exceed the limit factor multiplied by the amount of regular property taxes lawfully levied for such district in the highest of the three most recent years in which such taxes were levied for such district plus an additional dollar amount calculated by multiplying the regular property tax levy rate of that district for the preceding year by the increase in assessed value in that district resulting from:

• for a period not to exceed three years, any increase in assessed value within a levy revenue base lift area created by the new multifamily ordinances and development regulations and not included elsewhere for purposes of providing an additional dollar amount.

To access the levy increase discussed above, within a UGA, all cities and counties must provide by ordinance and incorporate into their development regulations, zoning regulations, and other official controls, authorization for the development of duplexes, triplexes, quadplexes, sixplexes, townhouses, and cottage clusters in areas zoned for detached single-family residential use.  Specifically:

• duplexes must be allowed on all lots or parcels;
• triplexes must be allowed on 80 percent of lots or parcels;
• quadplexes must be allowed on 70 percent of lots or parcels;
• sixplexes must be allowed on 50 percent of lots or parcels;
• townhouses must be allowed on 60 percent of lots or parcels; and
• cottage clusters must be allowed on 70 percent of lots or parcels.

"Cottage clusters" means groupings of no fewer than four detached housing units per acre with a footprint of less than 900 square feet each and that include a common courtyard.  "Townhouses" means a dwelling unit constructed in a row of two or more attached units, where each dwelling unit is located on an individual lot or parcel and shares at least one common wall with an adjacent unit.

A middle housing type is considered "allowed" on a lot or parcel when the following criteria are met:

• the middle housing type is a permitted use on that lot or parcel under the same administrative process as a detached single-family dwelling in the same zone;
• the lot or parcel has sufficient square footage to allow the middle housing type within the applicable minimum lot size requirement;
• maximum density requirements do not prohibit the development of the middle housing type on the subject lot or parcel; and
• the applicable siting or design standards do not individually or cumulatively cause unreasonable costs, fees, or delays to the development of that middle housing type.

To access the levy increase discussed above, within a UGA, all cities and counties must provide by ordinance and incorporate into their development regulations, zoning regulations, and other official controls, the following parking regulations:

• for lots or parcels with a duplex, a city or county may not require off-street parking spaces;
• for lots or parcels of less than 3000 square feet, a city or county may not require off-street parking spaces;
• for lots or parcels greater than or equal to 3000 square feet and less than 6000 square feet, a city or county may not require more than one off-street parking space total;
• for lots or parcels greater than or equal to 6000 square feet, a city or county may not require more than 0.5 times the number of dwelling units on the lot;
• a city or county may not require more than 0.5 off-street parking spaces per townhouse dwelling unit;
• a city or county may not require more than 0.5 off-street parking spaces per dwelling unit in a cottage cluster;
• a city or county may allow on-street parking credits to satisfy off-street parking requirements;
• a city or county may allow, but may not require, off-street parking to be provided as a garage or carport; and
• a city or county must apply the same off-street parking surfacing, dimensional, landscaping, access, and circulation standards that apply to single-family detached dwellings in the same zone.
   

New multifamily or parking-related ordinances, amendments to development regulations, and other nonproject actions taken by a city or county are not subject to administrative or judicial appeal under the State Environmental Policy Act.  If adopted by December 31, 2025, amendments to development regulations and other nonproject actions taken by a city or county to implement new multifamily or parking-related requirements are not subject to administrative, quasi-judicial, or judicial appeals under the GMA.

These new ordinances, development regulations, and other official controls apply to conversions of existing buildings in addition to new developments.