The Growth Management Act (GMA) requires cities to accommodate future housing and employment growth based on countywide planning policies and 20-year population forecasts. Counties, in consultation with cities, to adopt 20-year “growth targets” for cities within the county. The current growth targets for cities within King County were adopted by the King County Council upon the recommendation of the Growth Management Planning Council (GMPC). Mercer Islands current growth target, adopted by King County in 2010 and re-adopted in 2012, calls for 2,320 housing units by 2035.
Cities need to plan for additional housing and employment, but there is no requirement from the GMA that housing and workplaces actually be built—the requirement is only that the City’s zoning provides enough capacity to allow growth targets to be met. Mercer Island currently has enough capacity in the Town Center to accommodate our current growth targets.