Planning to build a new home, add an ADU, remodel your property, install a pool, replace a roof, or do any other construction or renovation project in unincorporated Marin County, California? You will need a building permit from the Marin County Building and Safety Division (part of the Community Development Agency).
Most people get stuck on the same questions: “How do I actually apply?”, “What will it cost in 2026?”, “How long does approval really take?”, “What documents do they want?”, and “What are the hidden tricks that make this process go faster?” This long, practical guide answers all of those questions with real-world steps, insider tips, and the exact workflow that experienced contractors and smart homeowners use every day in Marin County.
Marin County Building Department Contact Details 2026
Service | Details |
|---|---|
Building and Safety Address | 3501 Civic Center Drive, Suite 308, San Rafael, CA 94903 |
Main Phone | (415) 473-6550 |
Building Permits | (415) 473-6550 |
Inspections | (415) 473-6550 |
Email | Use the online contact form or CDA Building and Safety |
Hours | Monday–Friday, 8:00 AM – 1:00 PM (counter services; phone support varies) |
How to Apply for a Building Permit in Marin County, California – Complete Micro Step-by-Step Guide (2026)
- Confirm your property is in unincorporated Marin County (not in a city like San Rafael or Novato) and review zoning, coastal, or wildfire requirements.
- Access the Marin Building Permits online portal (cdaportal2.marincounty.org/MarinBuildingPermits).
- Prepare detailed construction drawings, site plans, specifications, and supporting documents (electronic submittal only since 2026).
- Determine if your project qualifies for self-service/flat-rate permits (many simple improvements) or needs full plan review.
- Complete the Part A Application and Submittal Checklist through the portal and upload all documents.
- Pay the required application and plan review fees online.
- Monitor your application status in the portal and respond quickly to any review comments.
- Once approved, pay the remaining permit fees and print/post the permit visibly at the job site before starting work.
- Schedule inspections through the portal or by contacting the Building and Safety Division.
Marin County Building Permit Fees 2026 – What You’ll Actually Pay
Fees include base permit fees (area-based or valuation-based), plan review, impact fees, taxes, and other agency charges. Base fees vary by project type (e.g., single-family dwellings, tenant improvements). Use the portal’s fee tools and explanation page for accurate estimates. Always review the full fee breakdown before submitting.
Insider Tips & Tricks That Save Time and Money in Marin County
- Use the online portal for all submissions — paper is no longer accepted.
- Submit complete, high-quality digital plans the first time to minimize review cycles.
- Call (415) 473-6550 early in the day for questions — counter services are limited.
- For simple projects, check if you qualify for self-service/flat-rate permits to skip full plan review.
- Estimate costs accurately using the portal tools to avoid surprises from impact fees or taxes.
- Schedule inspections promptly through the portal once work is ready.
- Coordinate early with other divisions (Planning, Public Works) if your project requires multiple approvals.
Frequently Asked Questions
How do I search for existing building permits in Marin County?
Use the online portal or the public permits and inspections dashboard/map to search by address or permit number.
How long does it take to get a building permit in Marin County?
Self-service permits can be quick. Projects needing plan review typically take longer depending on complexity and completeness of submission.
Can I pull my own permit as an owner-builder in Marin County?
Yes. Owner-builders can apply but must take full responsibility for code compliance and job safety.
What are the re-inspection fees in Marin County?
Re-inspection fees apply for failed or missed inspections. Exact amounts are in the current fee schedule.
Do I need approvals from other departments?
Yes. Many projects require review from Planning, Public Works, or other agencies. Coordinate early to avoid delays.
Last reviewed: April 15, 2026
Khushboo Bobade is a public records researcher and editorial writer specializing in government service documentation and construction permit systems.
Her research focuses on explaining building permits, inspection procedures, zoning regulations, and public permit records maintained by local government building departments across the United States.
Professional profile: View LinkedIn Profile