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The City Development Counter will be open effective Monday, August 18, 2022. If you prefer to make an appointment please call 303-538-7295 or email citydevelopment@thorntonco.gov.

Current Planning & Zoning

​​​​​​​​​​​​​​​​​​​​​​​​​The Current Planning Division at the City of Thornton is charged with overseeing and controlling development within the City. This is accomplished through reviewing and providing recommendations on: applications for Annexation, Rezoning and Subdivision of land, Conceptual Site Plans, Temporary Use Permits, proposed architecture for new buildings and additions, building permits, and minor amendments to approved projects.


For our new resource page, designed to help residents, homeowners, businesses, and developers find information on a variety of planning topics, visit the Helpful Resources and Common Questions page!