Do I Need a Permit to Remodel My Bathroom?

Short answer Usually yes, if the work touches plumbing, electrical, ventilation or walls. Purely cosmetic work with no utility changes, such as paint or new flooring, typically does not need one in San Jose. Rules differ by city, so we confirm permit needs for your address before the contract.

Where the line usually falls

Most Bay Area cities decide by what changes, not by what the job costs. San Jose is a typical example.

Work	Permit in San Jose
Paint, flooring, mirrors, cabinet hardware, no utility changes	Permit in San JoseTypically not needed
Electrical changes: new circuits, lights, outlets, fan wiring	Permit in San JoseNeeded
Plumbing changes: drains, supply lines, shower valve	Permit in San JoseNeeded
Mechanical changes: new or rerouted exhaust fan duct	Permit in San JoseNeeded
Structural changes: framing, joists, removing or moving walls	Permit in San JoseNeeded
Moving or adding fixtures, changing walls	Permit in San JoseMajor remodel, with plan review

A major remodel goes through plan review: drawings are submitted and approved before the permit is issued, so it adds time before work can start. Other cities in the area draw the line in similar places, but not always the same ones, which is why I check the rules for each address instead of assuming.

Why unpermitted work catches up with you

When you sell. Buyers' inspectors look for signs of recent work, and California sellers are expected to disclose what they know about their house. Unpermitted work can lower offers or lead to a permit after the fact, which may mean opening finished walls for inspection.
When you file a claim. If a leak comes from work done without a permit, the insurer may look closely at that work before paying.
When it was done wrong. Drains, venting, wiring and the fan duct all end up behind tile. A permit inspection is a check by someone outside the job before they are covered for good.

Drains, vents and supply lines in an open wall. A rough inspection looks at this stage, before the wall is closed and tiled.

The fixture rule that comes with a permit

California Civil Code 1101.1 says that when a permit is pulled for a remodel, older non-compliant plumbing fixtures in the house have to be replaced with water-conserving ones. That can include toilets, showerheads and faucets in other rooms, not only the one being remodeled. Any new fixture sold in California already has to meet the current limits:

Toilets: no more than 1.28 gallons per flush.
Showerheads: no more than 1.8 gallons per minute.
Bathroom faucets: no more than 1.2 gallons per minute.

If your house still has original fixtures from decades ago, plan for this. I look at the other fixtures during the site visit, so the replacement is in the estimate and not a surprise later.

Who pulls the permit

Who applies for the permit and whose name is on it should be written in the estimate, along with who schedules and attends the inspections.

We confirm permit needs for your address before the contract, and the schedule includes inspection time. What I cannot promise is how fast a city reviews plans or when an inspector comes. Those dates are set by the city, and I tell you as soon as I know them.

Can I skip the permit to save time?

On work that needs one, I do not recommend it. The time you save is mostly plan review and inspection waits. The cost shows up when you sell or file a claim, and fixing it then can mean opening walls that were just finished.

How do I find out if past work in my house was permitted?

Ask the city building department for the permit history of your address. Many Bay Area cities let you look it up online or at the permit counter. If the record does not match what you see in the house, it is better to know before you plan a remodel.

Do I need a permit to remodel my bathroom?