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Planning and development applications in California

Planning and development applications.

In California, 58 county departments and 1 city government publish 61 official links for this service. Reviewed requirements cover availability notices (28), documents (17), processing time (4) and appointments (1). 42 counties have a page for it below.

Before you start · 2 things to check

Start with the jurisdiction of the property. County permit offices may serve only unincorporated areas.
Use the official map and confirm project requirements with the planning or building office.

1 guide with reviewed service links · Marin

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Highlighted counties have a reviewed service guide matching this selection. An agency may serve only a city or part of a county.

California58 counties

County directory Reviewed service guides available

Map for browsing; agency service areas may differ.

Map source

U.S. Census boundaries via U.S. Atlas · 2017 edition, simplified for display.

County government · Marin

Community Development Agency

Planning & Zoning

Marin planning-permit application informationOfficial instructions

The Community Development Agency links to when a planning permit is needed and how to apply. This is a planning-permit resource; building permits and business licenses remain separate.

Source checked October 26, 2026

Marin County · Marin — building permit department (opens in a new tab)

Marin planning-permit application information

Get a planning permit New projects and businesses sometimes need more than a building permit or business license. Learn more about when you need a Planning Permit and how to apply.

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Planning and development applications in California

Community Development Agency

Planning and development applications by county