Do I Need a Permit for Electrical Work in San Francisco, CA?

San Francisco electrical work brings together California's demanding licensing framework (CSLB C-10 license required), the 2022 California Electrical Code's broad AFCI requirements, PG&E's complex utility coordination process, and the reality that a significant portion of SF's housing stock — particularly the Edwardian and Victorian buildings in the Richmond, Sunset, Western Addition, and Haight-Ashbury neighborhoods — still contains original knob-and-tube (K&T) wiring from the 1910s–1930s. K&T wiring in an active San Francisco home is an insurance, safety, and permit compliance issue that surfaces during any significant electrical renovation. Understanding when K&T must be addressed, and when it can remain in place under a more limited permit scope, is one of the more nuanced electrical questions in this guide.

San Francisco electrical permit rules — the basics

Electrical permits in San Francisco are filed through permits.sfgov.org by California CSLB C-10 (Electrical) licensed contractors. Verify CSLB license at cslb.ca.gov before signing any electrical contract — California's CSLB licensing system is the most comprehensive contractor licensing framework of any state in this guide, and unlicensed electrical work is a serious violation with significant homeowner liability. DBI electrical permits are reviewed and issued at the DBI counter or online; residential electrical permits for standard scopes typically issue within 1–3 weeks.

California adopted the 2022 NEC (with California amendments) effective January 1, 2023. The 2022 NEC requires AFCI protection on new circuits serving all habitable areas — kitchens, bedrooms, living rooms, dining rooms, family rooms, hallways, closets, and laundry areas. This is the broadest AFCI coverage standard of any city in this guide (the same standard as Seattle WA, which also adopted the 2023 NEC). GFCI protection is required at standard locations: bathrooms, kitchens within 6 feet of sinks, garages, outdoor receptacles, laundry areas, unfinished basements, and crawl spaces. New circuits in SF must meet both AFCI and GFCI requirements as applicable.

PG&E provides electric service to virtually all SF residential addresses. For panel amperage upgrades that change service entrance capacity — upgrading from 100A to 200A service — PG&E must disconnect and reconnect the service entrance conductors, and the process requires coordination with PG&E's Electric Service Planning group. Allow at least 10–15 business days for PG&E service change scheduling in SF, where PG&E's SF service territory has heavy demand for reconnection scheduling. For load-side panel replacements at the same amperage, no PG&E coordination is needed.

Three San Francisco electrical scenarios

Knob-and-tube wiring in San Francisco — the defining older-home electrical issue

Knob-and-tube (K&T) wiring — the electrical wiring method used from approximately 1880 to the 1930s — is present in a significant portion of San Francisco's pre-1940 housing stock. The system uses two separate conductors (hot and neutral) run through ceramic tube insulators where passing through framing members, and supported on ceramic knob insulators at intervals. K&T has no ground conductor, which means it is incompatible with grounded outlets and cannot support GFCI protection (GFCI devices require a neutral-ground relationship for proper operation on K&T).

DBI's position on K&T is practical: K&T wiring that is in good condition, not being disturbed by permitted work, and not being covered with insulation (which prevents the air cooling that K&T depends on for safe operation) is not automatically required to be replaced under a limited-scope permit. However, K&T that is disturbed by permitted work in the area of disturbance must be replaced with modern wiring in the disturbed area. A homeowner planning a kitchen renovation that will open walls containing K&T should anticipate that the K&T in the opened areas will be replaced as part of the electrical permit scope — a cost that should be included in project budgeting.

Homeowner's insurance is the other K&T reality in SF: most major insurance carriers have moved away from covering homes with active K&T wiring, or substantially increase premiums to compensate for the fire risk. A home with documented K&T wiring in active use may face policy non-renewal or premium surcharges. A full rewire — replacing all K&T with modern grounded wiring, adding a new panel, and AFCI protection throughout — costs $18,000–$40,000 for a typical SF Victorian or Edwardian, but eliminates the insurance issue and brings the home to modern safety standards. Several SF specialty electricians focus on Victorian rewire work and can complete the job with minimal visible disruption to plaster walls through selective fishing techniques.

What the DBI inspector checks on SF electrical permits

DBI electrical permit inspections follow rough-in and final sequences for larger projects. Rough-in before wiring is concealed: wire sizing and type, AFCI specification, junction box locations. Final: all devices installed, GFCI outlets tested, panel circuit directory labeled, junction boxes accessible and covered. For K&T replacement scopes, the DBI inspector verifies that all K&T in the permitted area has been replaced. Schedule through permits.sfgov.org.

What electrical work costs in San Francisco

SF electricians are the highest-paid in this guide — $110–$150 per hour for CSLB C-10 licensed labor. Single 20-amp circuit: $450–$900. EV Level 2 charger: $1,400–$2,800. Panel upgrade 100A to 200A: $4,500–$8,500. Full Victorian rewire: $18,000–$40,000. AFCI breakers add $40–$70 per circuit. DBI permit fees of $250–$500 are modest relative to project costs. SF electrical costs are 50–100% higher than OKC's and 30–60% higher than Denver's.

What happens if you do electrical work without a DBI permit in San Francisco

DBI Code Enforcement investigates electrical violations. San Francisco's active real estate transaction market means unpermitted electrical work is a frequent pre-sale inspection finding. California TDS disclosure requires disclosure of known permit violations. For K&T homes, unpermitted work that adds load to aging K&T wiring creates genuine fire risk. DBI permit fees of $250–$500 are trivial relative to any SF electrical project cost.

Common questions about San Francisco electrical work permits