"Do I need a permit for this?" is one of the most common questions homeowners ask — and one of the most commonly misanswered. Skipping a required permit can ultimately cost you far more than the permit itself. Here's what California homeowners need to know.
What Typically Requires a Permit in California
Most structural, mechanical, electrical, and plumbing work requires a permit. You almost certainly need one for:
- Adding or removing walls (load-bearing or not)
- Room additions, garage conversions, or ADU construction
- Electrical panel upgrades or adding new circuits
- Plumbing work: new supply/drain lines, water heater replacement, gas lines
- HVAC installation or system replacement
- Window enlargements (changing the rough opening size)
- Decks more than 30 inches above grade
- Roofing in many jurisdictions (varies by city)
- Basement or garage conversions to living space
What Typically Does NOT Require a Permit
- Painting (interior or exterior)
- Flooring replacement (hardwood, carpet, tile over existing slab)
- Cabinet replacement — same footprint, no electrical or plumbing changes
- Countertop replacement
- Cosmetic work that doesn't affect structure, electrical, or plumbing
- Minor repairs and maintenance
When in doubt, call your local building department. Most will answer permit questions free of charge, and it's far cheaper to ask than to assume.
Who Is Responsible for Pulling Permits
Your contractor should handle permit applications — it's part of the job, not an add-on. A licensed California contractor knows what their work requires and is legally responsible for ensuring the project meets code. If a contractor tells you permits aren't necessary for work that clearly requires them, or suggests you pull them yourself "to save money," treat it as a serious warning sign.
How the Permit Process Works
Permits are issued by your local city or county building department, not the state. The typical process:
- 1Contractor submits permit application and plans to the building department
- 2City reviews the application (simple projects may be approved same day; complex projects requiring plan check can take 4–12 weeks)
- 3Permit is issued and posted at the job site
- 4Inspector visits at required milestones: rough framing, rough plumbing/electrical, and final completion
- 5Final sign-off is issued after passing all inspections
Permit fees vary by jurisdiction and project scope, typically ranging from $100 for simple work to $2,000+ for large additions. This cost should be included in your contractor's bid.
What Happens If You Skip a Permit
Skipping a permit creates problems that often emerge at the worst possible times:
Insurance
If something goes wrong — a fire, a flood, a structural failure — and unpermitted work is involved, your homeowner's insurance company may deny the claim entirely. You could be left paying for remediation out of pocket.
Home Sale
Unpermitted work must typically be disclosed when you sell. Buyers' inspectors increasingly identify it, and buyers' agents know to ask. You may be required to pull retroactive permits, redo work that doesn't pass inspection, or reduce your sale price to account for the risk. What seemed like a shortcut becomes a negotiating liability years later.
Safety
Building inspections exist because inspectors catch real problems: wiring done incorrectly, structural connections that don't meet code, gas lines that could leak. The inspections aren't bureaucratic theater — they're the check that catches errors before they become disasters.
How to Verify Your Contractor Pulled the Permit
Your contractor should give you the permit number as soon as it's issued. You can verify it yourself through your city's online building permit portal — most California cities now maintain searchable permit databases. Search by your address. Confirm the permit is open, that the listed contractor matches who you hired, and that inspections are being scheduled as work progresses.