County government
Community Development Agency
Marin County building permit services. Confirm which county or city agency handles your property before applying.
Marin planning-permit application information (opens in a new tab)Official 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 & saved evidence
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.
Agent source review: October 26, 2026 · Snapshot 007c1e3006245683