About Us

Welcome to the San Mateo County Planning and Building Department website. The Planning and Building Department's mission is to plan and regulate land use and development within the unincorporated areas of the County so that diverse and livable communities can thrive. We serve the County's residents, businesses, and visitors through the preparation and administration of land use plans and regulations, and by reviewing land use proposals to ensure they are consistent with those plans and regulations.

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Major Projects
Zmay Minor Subdivision

Project Number PLN2014-00410 Review Period Saturday, April 7, 2018 to Monday, May 7, 2018 Contact Erica D. Adams, Project Planner (650) 363-1828

Ascension Heights Subdivision Project

The Ascension Heights subdivision an approved 19-lot subdivision of a 13.25-acre vacant hill located in within the San Mateo Highlands, an unincorporated area of San Mateo County. 

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