At some point during a quote, you may hear a version of this: "We can skip the permit and save you a few hundred bucks." It sounds like the contractor is doing you a favor. They are not. A permit is the paper trail that proves the work was done to code and inspected by your city. Skipping it doesn't make the risk disappear — it just moves the risk from the contractor onto you, the homeowner.
Here's the plain-English version of when a permit is required in the Bay Area, who is supposed to pull it, and what actually happens when work goes unpermitted.
Which electrical jobs need a permit?
The exact rules are set by your city or county building department, but across San Mateo and Santa Clara counties the pattern is consistent. A permit is generally required for:
- Service and panel upgrades (e.g. 100A to 200A), panel replacements, and subpanels
- New circuits — an EV charger, a hot tub, an induction range, an ADU feed
- Rewiring, or replacing knob-and-tube or aluminum branch wiring
- Moving or adding service equipment, meters, or grounding
- Most work that opens walls or alters the permanent wiring of the home
A permit is generally not required for true like-for-like repairs and maintenance: swapping a light fixture, replacing a single outlet or switch, or changing a faulty breaker for an identical one. The rule of thumb: if you're adding capacity or changing the system, it needs a permit. If you're fixing one device in place, usually not. When it's borderline, the building department is the authority — and a good electrician will just call and ask rather than guess.
Who is supposed to pull the permit?
This is the part homeowners get wrong, often because a contractor nudged them. A licensed C-10 electrical contractor pulls the permit for you, in the contractor's name. That's the normal, correct arrangement. You shouldn't have to drive to the building department, and you shouldn't be the name on the permit for work you didn't perform.
Why it matters whose name is on it: the permit holder is the party responsible to the city for the work passing inspection. When the contractor pulls it, the contractor is on the hook to make it right. When you pull it as an "owner-builder," you've quietly taken on that responsibility — and any warranty or liability gap that comes with it. We wrote a separate guide on owner-builder permits, but the short version is: if a contractor is pushing you to pull the permit yourself, ask why they don't want their name on it.
What unpermitted work actually costs you later
The few hundred dollars "saved" up front can turn into a much larger bill at the worst possible moment. Three real consequences:
1. Insurance can deny a claim
If an electrical fire or fault traces back to unpermitted, uninspected work, your insurer can deny the claim — and in some cases reassess the policy. You paid premiums for years, and the coverage evaporates over a missing permit. This is the single most expensive way the gamble goes wrong.
2. It surfaces when you sell
Unpermitted work is a classic deal-killer in escrow. Buyers' agents and home inspectors flag a panel or circuit with no permit on record, and suddenly you're either renegotiating the price down or scrambling to legalize the work under a deadline. A $400 permit you skipped in 2024 becomes a $3,000 problem and a delayed close in 2027.
3. The city can require it to be opened up and redone
If unpermitted work is discovered, the building department can require a retroactive permit — and an inspector who can't see the concealed work may require walls or covers to be reopened so it can be verified. You can end up paying to expose, inspect, and sometimes redo work you already paid for once.
Can unpermitted work be legalized after the fact?
Usually, yes. Most Bay Area jurisdictions allow a retroactive (or "legalization") permit. The process: a licensed electrician documents the existing work, files for the permit, and the inspector verifies it — sometimes requiring portions to be made accessible. If the work was done to code, legalization is mostly paperwork and an inspection fee. If it wasn't, the corrections come first. Either way it's cleaner and cheaper to handle before you list the house, not during escrow.
The honest takeaway
A permit isn't bureaucratic padding on your bill — it's the thing that protects you if something goes wrong, and the proof of quality when you sell. A contractor who wants the permit is the one protecting your interests. A contractor who wants to skip it is protecting their schedule and shifting the downside to you.
So the green flag to look for is simple: the electrician offers to pull the permit in their name, includes it as a clear line item, and coordinates the inspection. That's not the expensive option. That's the safe one.
Talk to Fox Electric
On permitted jobs — panel upgrades, EV chargers, new circuits, rewires — we pull the permit in our name and coordinate the city inspection as part of the job, and we tell you up front what it costs. If you've got existing unpermitted work you want legalized before a sale, we can help with that too. We serve San Mateo and Santa Clara counties.
Call (650) 550-0719 and tell us what you're planning — we'll tell you whether it needs a permit before you commit to anything. Related reading: how long a panel upgrade and PG&E coordination actually takes, and the difference between an estimate and an inspection.
