The landowner, the City, or the County can propose a UGA expansion. For a UGA to be associated with the City as a PAA, the City must agree by designating the area as such in the Comprehensive Plan. However, pursuant to
RCW 36.70A.110, only Pierce County can officially expand the UGA. UGA expansion is a difficult, time-consuming process involving both jurisdictions.
Public services such as police, fire protection, sewer, and water must be available to the proposed UGA. UGA expansion should result in logical, orderly boundaries, so each local government and special purpose district (fire districts, water districts, etc.) can efficiently provide the service without gaps or overlaps. Most importantly, the expansion must be necessary to accommodate anticipated growth. Pierce County's various UGAs already have excess capacity, so the County is discouraging UGA expansions.