How Long Does It Take to Get a Permit?
Real building permit timelines for San Francisco and Marin — and what they mean if you're remodeling, planning a sale, or sitting on unpermitted work.
Building permit timelines in the Bay Area vary widely. In San Francisco, simple projects often take 1–3 months, additions and major remodels typically run 18–24+ months, and complex projects in historic or restricted zoning districts can take 2+ years. The San Francisco Department of Building Inspection (DBI) reviews plans alongside Planning, Public Works, and Fire. In Marin County, each city (San Rafael, Mill Valley, Larkspur, Tiburon, Novato, Fairfax, and unincorporated Marin) runs its own permitting. Interior remodels often take 2–8 weeks, additions 2–4 months, and projects requiring design or environmental review 4–12 months. Written by Oliver Burgelman, Vanguard Properties (DRE #01388135). Direct line: 415.244.5846.
Why permit timelines matter (especially before listing)
Getting a building permit in the Bay Area can take anywhere from a few weeks to several years. In San Francisco, even small remodels often face long review times. In Marin County, approvals are usually faster but vary widely by city. The two timelines can look like different planets.
If you're thinking about remodeling or adding onto your home, the question that comes up first is: how long will the permit take? The answer depends almost entirely on where you live, and on whether you're trying to time the work against a sale. Here's the straight version.
San Francisco permits: a lesson in patience
In San Francisco, small projects can take months. Larger remodels and additions routinely stretch into years.
Permits are handled by the San Francisco Department of Building Inspection (DBI), usually in coordination with the Planning Department, Public Works, and the Fire Department. Each agency reviews different aspects: zoning and design, structural safety, neighborhood impact, fire compliance. The handoffs between them are where most of the calendar gets eaten.
Common SF timelines look like this:
- Simple projects — 1–3 months, depending on complexity and whether an over-the-counter permit is possible.
- Additions or major remodels requiring neighborhood notification or design review — 18–24+ months.
- Projects in historic or complex zoning districts (RH-2, RH-3, mixed-use lots) — potentially 2+ years.
Beyond complexity, staffing shortages and review backlogs regularly delay approvals. In some cases, applicants spend more time waiting for their plans to be assigned to a reviewer than they spend revising them. This is why a lot of SF homeowners rely on permit expediters, people who specialize in navigating the city's internal workflow. Even that isn't always a sure thing. The most reliable move is putting a strong team together early: an architect who has been through SF's process, a contractor who has pulled permits in your district, and an expediter if the project complexity warrants one.
Marin County permits: usually faster, but it varies
Marin's permitting is decentralized. Each town, San Rafael, Larkspur, Mill Valley, Tiburon, Novato, Fairfax, and unincorporated Marin, runs its own review process. That means timelines vary widely depending on which side of which boundary you're on.
Generally:
- Smaller interior remodels — 2–8 weeks.
- Additions or exterior changes — 2–4 months.
- Projects requiring design review or environmental review — 4–12 months, sometimes longer. I had a yard remodel in Marin take a year to get approved, so even seemingly straightforward projects can run long when the right (or wrong) overlay applies.
A kitchen remodel in San Rafael might be permitted in under a month. A hillside addition in Mill Valley requiring design review can take the better part of a year.
That said, Marin's planning departments tend to be smaller, more responsive, and less bureaucratic than San Francisco's. Communication and transparency are usually much better — you can often get a real person on the phone and a real answer in a week.
How to keep your project moving
You can't control every delay, but you can avoid the self-inflicted ones:
- Hire professionals familiar with your specific city's staff. Local architects and contractors know exactly what each reviewer looks for — and what each one rejects on sight.
- Start with a complete set of drawings. Missing details are the number-one cause of "return for correction" delays. Each back-and-forth can add a week.
- Understand zoning early. Don't assume what you can build. Confirm lot coverage, setbacks, and height limits before the design takes shape.
- Submit online and track progress. Most jurisdictions now offer digital portals with real-time review status. Use them.
- Expect revisions. Plan-check comments are part of the process. Build response time into your schedule.
Quick comparison: SF vs Marin permit times
| San Francisco | 1–3 months simple · 18–24+ months additions · 2+ years complex / historic |
|---|---|
| Marin County | 2–8 weeks interior · 2–4 months additions · 4–12 months design review |
| SF reviewing agencies | DBI, Planning, Public Works, Fire (depending on project) |
| Marin reviewing agencies | Individual cities plus unincorporated Marin County |
| Fastest path | Over-the-counter permits (cosmetic or like-for-like work) |
| Longest path | 2+ years — SF historic district / RH-2 / RH-3 / mixed-use |
| Biggest schedule killer | Incomplete plans & review-cycle handoffs between agencies |
| Best mitigation | Local architect + complete drawings + early zoning check |
About the author
23+ years selling homes across San Francisco and Marin. I work with sellers regularly on permit-related questions — legalizing unpermitted work before listing, timing remodels against a sale, and pricing as-is when permits don't pencil. If you've got a permit question tied to selling, reach out.
Frequently asked questions about SF and Marin building permits
How long does a building permit take in San Francisco?
How long does a building permit take in Marin County?
What is the San Francisco Department of Building Inspection (DBI)?
How can I speed up a building permit in San Francisco?
Do I need a building permit to remodel my kitchen or bathroom?
What happens if I sell a home with unpermitted work?
Should I pull permits before remodeling to sell?
Where can I check the permit history of a home?
Thinking of selling a home with permit questions?
Selling and have a permit question?
If you own a home in SF or Marin and there's a permit angle to your sale — unpermitted work, mid-remodel timing, or how to price around it — I'd love to walk through what makes sense for your situation.
