Fees, valuation & enforcement
Permit fees are a project input. Enforcement exposure is a project risk. Use the official schedule where available, then confirm valuation, trade permits, plan review, and inspection charges with the Authority Having Jurisdiction.
Official fee pathway
The final charge may depend on declared construction value, occupancy classification, square footage, plan review, state surcharges, trade permits, technology fees, and inspection activity. Do not use a neighboring city’s fee table as a substitute for this jurisdiction.
Fee desk contact
(415) 473-6550 (Building and Safety); (415) 473-6560 (24-hour inspection line)
Ask the counter to confirm current charges before submitting a project with multiple trades or a change of use.
Financial exposure
Plan for building, mechanical, plumbing, electrical, fire, energy, zoning, septic, right-of-way, or other reviews that the project scope triggers. The lowest initial permit fee is not always the lowest project cost.
Enforcement exposure
When work begins without authorization, the agency may halt the site, require corrective plans, impose additional fees, withhold inspection release, or require concealed work to be exposed for review.
Closeout exposure
A missing final inspection or certificate can complicate occupancy, refinancing, sale, insurance, and utility connection. Preserve the approved plans and signed inspection record through closeout.
Professional field note
Even when a cosmetic or minor project does not require a building permit, zoning, floodplain, shoreline, historic, utility, fire, or right-of-way controls may still apply. Confirm the full jurisdictional picture before work starts.
Source trail
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
Marin County Community Development Agency, Building and Safety Division is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact (415) 473-6550 (Building and Safety); (415) 473-6560 (24-hour inspection line).
Quick online maintenance and minor-improvement permits are issued as quickly as the applicant completes the online application; larger projects requiring plans up front are estimated by the county at 6-8 weeks, depending on collaboration, completeness, and project complexity.
Release all permit holds first, then call the automated 24-hour line at (415) 473-6560 or text (877) 410-7201 with the permit number, project address, and three-digit inspection code. Permits beginning with B can also be scheduled through the online portal. The inspector calls or texts between 8:00 and 9:00 a.m. with a two-hour window; have the permit, approved plans, and required documents onsite. Other required fire, Public Works, Planning, or Environmental Health inspections must be scheduled separately.
Marin County adopted the 2025 California Building Standards Code effective January 1, 2026, with local Title 19 amendments. The current cycle includes the 2025 California Building/Residential, Mechanical, Plumbing, Electrical, Energy, Existing Building, Green Building, Fire, and Wildland-Urban Interface codes, plus Marin-specific wildfire, seismic, steep-terrain, water, and green-building requirements. Marin County lists exemptions for qualifying one-story detached non-habitable sheds, playhouses, and similar accessory structures up to 120 square feet; rural tool sheds, workshops, or horse stalls up to 300 square feet on parcels of at least one acre; qualifying playground equipment up to 15 feet high; above-ground pools under 24 inches deep and 5,000 gallons; fences up to 7 feet (with Planning review still required above 6 feet in many cases); sidewalks and driveways meeting height/accessibility limits; qualifying agricultural shade-cloth structures; retaining walls up to 4 feet without surcharge or heavy loads; grade-supported tanks up to 5,000 gallons with a 2:1 height-to-width ratio; painting, papering, tiling, carpeting, cabinets, countertops, moveable fixtures and low-profile partitions; and qualifying wall-supported awnings. Zoning, Planning, and trade requirements can still apply to exempt work.
Why permit costs vary
Building departments commonly calculate charges from valuation, occupancy, floor area, project type, plan review effort, trade scope, state surcharges, and inspection activity. A remodel that appears small on paper may still trigger structural, energy, fire, or utility review. Ask the permit counter which disciplines apply before you finalize the construction budget.
The same discipline applies to enforcement. Correcting unpermitted work after finishes are installed can require demolition, revised plans, additional inspections, and schedule disruption. Authorization is usually the less expensive project-management decision.