How Much Does a Building Permit Cost in San Francisco?

Permit Cost by Project

Do You Need a Permit?

San Francisco uses a valuation-based system for building permits. You add the plan review fee to the permit issuance fee. Both come from Table 1A-A, and the July 2026 edition kept the same rates. At $8,000 valuation the two add to $797. Jump to $25,000 and they reach $1,425. Two state fees ride on every building permit: the California Building Standards Commission fee of $4 per $100,000, minimum $1, and the Strong Motion Instrumentation Program fee of 0.00013 times valuation for homes, minimum $0.50. Alteration permits on one- and two-family homes built before 1979 add a $5.00 lead-safe-work surcharge (Table 1A-A note 2); the figures here assume a newer home. Electrical runs a flat $305 for most Category 1 jobs. Plumbing and mechanical each start at $290. Reroofing is a flat $320 for a single-family home or duplex, and a demolition permit is $724; Ordinance 112-26 raised those two from $309 and $646. The calculator on this page runs the numbers so you don't have to dig through the tables.

Most changes trigger a permit in San Francisco. You need one for bathroom remodels over cosmetic level. Same for kitchen work that touches structure or layout. Decks over 30 inches above grade require approval. Window replacement usually needs an over-the-counter permit. But painting never does. Floor covering outside bathrooms stays exempt. Minor wallboard repairs that don't involve fire-rated assemblies don't need a permit. One-story detached sheds with up to 120 square feet of floor area dodge the rules. Fences under 6 feet at the rear or side lot lines stay free. I spent hours reading the exceptions in SFBC 106A.2. The list feels short once you start planning real work. Don't assume your project qualifies. Check first. Skipping the permit creates bigger problems later.

San Francisco doubles the permit fee when you get caught without one. They can go higher. Stop-work orders come fast if neighbors complain. The Department of Building Inspection cites Table 1A-R for penalty calculations. Unpermitted work also risks code violations that block your sale someday. Title companies hate this stuff. Nobody wants to buy a house with hidden non-compliant changes. I pulled the enforcement language from the same Chapter 1A document. The city doesn't play around. Pay the fee upfront. Fix issues during plan review instead of after the fact.

San Francisco building permits expire after 18 months. You must request an extension before that date. The Department of Building Inspection reviews each request individually. They rarely grant more than one without good reason. Start your project early. Don't let the clock run out midway through rough-in. I found this buried on page 12 of the fee tables PDF. Worth knowing before you pay.

Your contractor should pull the permit in their name. Not you. California law puts full responsibility on whoever signs the application. Homeowners can pull owner-builder permits but the rules get strict fast. You certify you'll supervise the work yourself. Most contractors resist when you ask them to let you pull it. That request alone raises a red flag. I read the exact language in the DBI owner-builder affidavit. Protect yourself. Let the licensed pro file the paperwork.

San Francisco splits everything into separate trade permits. One for building, one for plumbing, one for electrical, one for mechanical. That pushes a $15,000 bathroom to about $1,654 in total fees. The reroof permit stays flat at $320 for single-family homes even on a $25,000 job. State surcharges always apply on top of building permits. The city enforces the 2025 San Francisco Building Code, its own amendments to the 2025 California Building Code. The calculator runs the published tables. The numbers still surprise people.

How much does a building permit cost in San Francisco?

A $15,000 bathroom remodel runs about $1,654 in total San Francisco permit fees. That includes the valuation-based building permit with its state fees plus separate plumbing and electrical charges. Use the calculator above to run your exact project.

Do I need a permit to replace a water heater in San Francisco?

Yes you need a permit to replace a water heater in San Francisco. It falls under a flat Category 1P plumbing permit that costs $290. Don't skip this one. The building department tracks these closely.

Do I need a permit to build a deck in San Francisco?

Yes you need a permit to build a deck in San Francisco if it sits more than 30 inches above grade. Expect to pay about $799 on a typical $7,100 project, state fees included. Platforms 30 inches or less stay exempt.

How much is a plumbing permit in San Francisco?

The plumbing permit alone costs $290 in San Francisco. That's the flat Category 1P fee, which also covers a single kitchen or bathroom remodel. The full bathroom remodel package runs about $1,654.

Why does San Francisco charge separate permits for every trade?

San Francisco requires separate building, electrical, plumbing and mechanical permits instead of one combined fee. A $25,000 kitchen totals about $2,169 under this system. The structure comes from Tables 1A-A, 1A-C and 1A-E in the July 2026 fee schedule.