Washington’s Growth Management Act, enacted in 1990 and substantially amended many times since, is the statutory framework that shapes land use, infrastructure investment, and development capacity across the state’s most rapidly growing counties. For developers building in Washington, the GMA is not background regulatory context; it is the source of the specific local regulations, urban growth area boundaries, concurrency requirements, and comprehensive plan land use designations, that determine where development can occur and what infrastructure must exist to support it.
Understanding the GMA’s core concepts gives developers entering Washington markets the framework to interpret local regulations that are meaningfully different from the development regulatory systems of Texas, Arizona, and Colorado.
Urban Growth Areas: Where Development Is Directed
The GMA’s most fundamental land use tool is the Urban Growth Area (UGA), a boundary that each GMA county must designate around its cities and urban areas, within which urban-density development is expected and outside which rural character is to be maintained. Development at urban densities outside the UGA is generally prohibited; the UGA is where infrastructure investment, roads, water, sewer, parks, is directed, and it is where development that relies on urban services is expected to locate.
For developers, the UGA boundary is a critical site selection filter. Land outside the UGA is priced and regulated as rural land; it may be suitable for rural residential development at very low densities but is not viable for multifamily or commercial development that depends on urban infrastructure and services. Land inside the UGA, particularly land near existing development that is served by water and sewer, is where development feasibility exists.
The UGA boundaries are not permanent. Counties must review and update their comprehensive plans and UGA boundaries every ten years, and those updates can expand or contract the UGA based on population projections. Developers who track the comprehensive plan update cycle in the counties where they are active can anticipate UGA expansions that create new development opportunities before they are publicly recognized in land prices.
Concurrency: Infrastructure Must Keep Pace
The GMA’s concurrency requirement, that adequate public facilities and services must be available “concurrent with development”, means that a development project cannot receive final approval if the public infrastructure needed to serve it (roads, water, sewer, parks, schools) does not meet locally adopted level of service standards at the time of approval.
In practice, concurrency is most frequently encountered as a transportation concurrency issue, when a development project would generate traffic that causes an intersection or road segment to fail the city’s adopted level of service standard. A project that fails transportation concurrency cannot receive final land use approval until either the road improvement needed to restore level of service is funded and programmed, or the developer pays a proportionate share of the improvement cost, or the city’s transportation plan is amended to change the level of service standard.
In the Puget Sound’s most congested corridors, arterials serving the transit-oriented development zones around Seattle’s urban centers, transportation concurrency has been a real constraint on development approval. Projects that require transportation concurrency mitigation add cost (the developer’s proportionate share of road improvements) and time (the programming and approval of the road improvements) to the entitlement process.
Comprehensive Plan Compliance
Every GMA county and city must maintain a comprehensive plan, a long-range plan that guides future development, infrastructure investment, and environmental protection. Development that is inconsistent with the comprehensive plan’s land use designations is not approvable under the plan; changing the designation requires a comprehensive plan amendment, which is processed either through the county’s regular amendment cycle (typically annual) or through an emergency amendment process for time-sensitive situations.
For developers, the practical implication is that the comprehensive plan land use designation of a potential development site is as important as the current zoning. A site that is currently zoned for light industrial but is designated for mixed-use commercial in the comprehensive plan may be in the process of transitioning, the zoning is a legacy of prior use, and the comprehensive plan is a signal that the jurisdiction intends to allow higher-intensity development as the transition proceeds.
Jurisdictions sometimes have inconsistencies between their comprehensive plan designations and their zoning code, areas where the plan calls for a use intensity that the current zoning doesn’t allow. A developer who identifies such an inconsistency has identified a site where a rezone aligned with the comprehensive plan may be achievable without the full political uncertainty of a rezone that changes the plan’s intention.
The GMA in Eastern Washington
The GMA applies differently in Eastern Washington than in the Puget Sound. The counties that are fully planning under the GMA, Spokane, Yakima, Benton, Chelan, and others above the population thresholds that trigger full planning requirements, must designate UGAs and address concurrency, but their planning processes are generally less contentious and less time-consuming than their Puget Sound counterparts.
Spokane County’s comprehensive plan and UGA designations govern development in the Spokane area, including the cities of Spokane, Spokane Valley, and Liberty Lake. The planning environment in Spokane is faster and less adversarial than Seattle’s, the GMA’s requirements are met, but the volume of public controversy that attaches to development applications in Spokane is a fraction of what Seattle projects routinely encounter.
Developers whose prior Washington experience is in the Puget Sound should not assume that Spokane’s GMA compliance processes operate on Seattle timelines or with Seattle’s level of scrutiny. The same statutory framework produces very different practical experiences in the two markets.
Washington’s Growth Management Act has shaped the state’s development landscape for more than three decades, concentrating urban development, preserving agricultural and resource lands, and creating the regulatory framework that makes Washington’s permitting environment one of the most demanding in the country.
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