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California · official local service finder

Zoning & building permits in California

Look up a property’s zoning and find the right permit office.

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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.

2 guides 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
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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

Assessor-Recorder-County Clerk

Assessor · Recorder

Assessor mapping (opens in a new tab)Official instructions

Official assessor maps and property information. Read the office’s current requirements before continuing.

Source checked October 12, 2026

Marin County · Marin County — assessor recorder clerk (opens in a new tab)

Service link: Assessor mapping

Assessor mapping

Saved evidence: 4414defaa2ba0a4e · Agent source review

Assessor mapping (opens in a new tab)Official instructions

Officially linked county property-map resource. This verifies the referral and stated label; interactive layers, parcel results, legal boundaries, buildability and application eligibility are not determined here.

Source checked October 26, 2026

Marin County · Marin County — assessor recorder clerk (opens in a new tab)

Official property-office map referral: Assessor mapping

Assessor mapping

Saved evidence: 4414defaa2ba0a4e · Agent source review

Full guide, contact details & sources →
County government · Marin

Community Development Agency

Building & Safety · Planning & Zoning

County building permit information (opens in a new tab)Official instructions

Official county building permit guidance. Service boundaries and project requirements must be confirmed with the department.

Source checked October 14, 2026

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

Official page text containing: The Community Development Agency is dedicated to promoting, protecting, and advancing healthy, safe, and equitable commu

ur government Toggle Search Query Home Departments Community Development Agency Community Development Agency What we do The Community Development Agency is dedicated to promoting, protecting, and advancing healthy, safe, and equitable communities. Find the Division you need CDA Highlights Tam Junction Content text Tam Junction Placemaking Study for community and economic vitality. West Marin Visioning Content text The West Marin Visioning initiative is a community-driven effort to define a shared, long-term vision for the future of West Marin. Septic Regulations Update Content text Updating the Count

Saved evidence: 007c1e3006245683 · Agent source review

Online building permit portal (opens in a new tab)Official online service

Official department resource. Confirm jurisdiction, eligible project types and the published instructions before using this service.

Source checked October 14, 2026

Marin County · Marin County — How to apply for a building permit (opens in a new tab)

Official page text containing: Online permit portal Apply for all building permits through our online portal.

l review process. Building Permit Submittal Checklist Make a list of documents you need to submit for a building permit Online permit portal Apply for all building permits through our online portal. [External] Submit plans before starting a big job Share your plans with us before you start a big project. Digital plans will speed our review. How does the permit process work? What do I submit? How does this work? What do I get? Self-service permits for properties with septic systems The Environmental Health Services (EHS) division of the Marin County Com

Saved evidence: 290b20e14074f521 · Agent source review

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 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.

Saved evidence: 007c1e3006245683 · Agent source review

Marin zoning and Countywide Plan lookup instructions (opens in a new tab)Official instructions

The official lookup explains address/APN searching, leading zeros and selecting the matching dropdown result. Vacant parcels require the Assessor Parcel Number. Countywide Plan designations and zoning are described separately.

Official zoning/Countywide Plan search

Vacant parcels are only searchable by Assessor Parcel Number.

Official information checked October 26, 2026 · Details & sources

Official lookup input guidance

Begin typing the full address or Assessor Parcel Number, including leading zeros.

Official information checked October 26, 2026 · Details & sources

Source checked October 26, 2026

Marin official map information · Marin official zoning map information candidate (opens in a new tab)

Official county map/provider evidence: exact named map, actual layer list, access instructions or limitation

Type in your address or your Assessor Parcel Number (shown on your tax documents). Vacant parcels are only searchable by Assessor Parcel Number.

Saved evidence: e3526a3584faac86 · Agent source review

Full guide, contact details & sources →

Selected agencies, with sources checked individually. See all coverage and sources.