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King County Land Use Regulations govern the development and use of land in unincorporated King County. Many of these regulations are found in K.C.C. Title 21A, King County Zoning Regulations.

King County's zoning code establishes standards for uses that are allowed within each of the different zoning categories and under what conditions. The zoning code also establishes standards for how development should occur, including minimum parking requirements, setbacks from streets and adjacent properties, landscaping, and other aspects of development that have an impact on the surrounding community. The current zoning code was originally adopted in 1993. The zoning code is found in Title 21A.

The Department of Permitting and Environmental Review (Permitting) is considering a package of amendments its development regulations and accepted public comment on the proposals through Friday, July 12. After reviewing public comments, the Department of Permitting and Environmental Review will make a recommendation to the King County Executive who will then decide whether to forward the recommendations to the King County Council for its review. The King County Council will hold public meetings and take comment on any recommendations before it takes action.