Most home projects that involve structural changes, electrical, plumbing, additions, or a change of use require a permit, while cosmetic work like painting, flooring, and cabinet replacement usually doesn’t. Permits protect your safety, your home’s value, and your insurance. Here’s when you do and don’t need a permit.
When it comes to remodeling or improving your home, there are a lot of options, and it’s not always obvious which ones need a building permit. Some renovations are minor while others are major, and it can be confusing to know whether you need a permit for a given project.
As a general rule, small or minor repairs that don’t touch the home’s systems (plumbing, electrical, gas, HVAC, or structure) usually don’t require a permit. Larger remodeling and construction projects that do affect those systems almost always do.
One important note for California homeowners: permits are issued and inspected locally by your city or county building department, but they all enforce the same statewide rules under the California Building Standards Code (Title 24). The current 2025 edition took effect January 1, 2026, so requirements are as current as ever: always confirm the specifics with your local department.
Here at GreatBuildz, a free service that connects homeowners throughout California with reliable general contractors, we get questions about building permits every single day. Below is a quick, project-by-project guide to virtually every job around your house.
If a permit is required for your project, it’s important that you (or your contractor) actually pull it from the city. The permit process ensures an inspector reviews the work and signs off on its quality, so you can rest assured the job is done right and up to code. A permit may slightly increase your project’s cost and timeline, but it’s well worth the trade-off, and skipping it can create real problems when you sell, insure, or refinance your home.
Quick Reference: Which Home Projects Need a Permit?
Here’s a fast overview. Details and exceptions for each project follow below.
| Home Project | Permit Usually Needed? |
|---|---|
| Kitchen remodel (full) | Yes |
| Bathroom remodel (full) | Yes |
| Replace flooring | No |
| Replace cabinets | No (unless plumbing/gas is moved) |
| Replace windows | Yes |
| Replace roof | Yes |
| Replace countertops | No |
| Replace HVAC / heater / AC | Yes |
| Replace a toilet or water heater | Usually yes (water heater); toilet swap often no |
| Convert a garage into a room | Yes |
| Add a room / bedroom / addition | Yes |
| Add a bathroom | Yes |
| Replace siding or stucco | Yes |
| Remove an interior wall | Yes if load-bearing; maybe not if not |
| Build a deck or patio | Depends on height & size |
| Interior/exterior painting | No |
Do I need a permit to remodel my kitchen?
Yes, you generally need a permit to remodel your kitchen.
In general, a kitchen remodel needs a permit because it involves many of the home’s internal systems: plumbing, electrical, potentially gas, and sometimes HVAC. Some kitchen remodels even require demolishing or relocating an interior wall, which changes the structural elements of your home and again necessitates a permit.
You may not need a permit for a very minor kitchen update. For example, changing countertops, the backsplash, or the flooring won’t require a city permit on its own. If you’re replacing all the cabinetry, you may or may not need a permit – the cabinets themselves don’t, but you’ll likely be removing or relocating appliances, the sink, and working with plumbing, electrical, and gas.
Another permit-free option is simply refinishing your cabinets by sanding and painting them, or just replacing the cabinet fronts, doors, and drawers.
Do I need a permit to remodel my bathroom?
Yes, you generally need a permit to remodel your bathroom.
A complete bathroom remodel requires a city permit because you’ll be involving your plumbing and electrical systems. Removing and reinstalling tile in your shower or bathtub also requires waterproofing materials like backerboard that need to be inspected.
Some minor bathroom repairs can be done without a permit, things like replacing the flooring, painting, or swapping out the bathroom cabinets. But as soon as you start moving the toilet, sink, or shower, you’ll need a permit because you’re working with the home’s plumbing.
What about just replacing a toilet? A straight like-for-like toilet swap in the same spot generally doesn’t require a permit. But if you’re relocating the toilet or altering the drain line, that’s plumbing work that typically does.
Do I need a permit to replace my floors?
No, you do not need a permit to replace your floors.
Whether you’re replacing your flooring with carpet, laminate, vinyl, hardwood, or even tile, there’s no need to secure a city permit. Changing flooring, including installing hardwood floors, is a cosmetic update that doesn’t affect the structural or other systems in your home.
The exception: subfloor and framing. If you discover subfloor or framing issues during the job, things like rotted joists, sistering floor joists, or termite damage, you may need a permit to make those structural repairs. A good contractor will flag those requirements for you.
Do I need a permit to replace my cabinets?
No, you do not need a permit to replace your cabinets.
In most cases you don’t need a permit to replace cabinets – kitchen, bathroom, closet, or any other built-ins. The caveat, as noted above, is cabinets with plumbing elements like a sink, faucet, or disposal, which may require a permit for the plumbing reconnection.
Similarly, some kitchen cabinets house appliances like a built-in oven, and may require adjusting or relocating gas or electrical lines to reconnect that appliance, in which case you’ll likely need a simple permit for that work.
Do I need a permit to replace my windows?
Yes, you generally need a permit to replace your windows.
Because windows keep your house weathertight and comfortable, a permit is generally required so the city inspector can validate they were installed correctly and perform as they should.
The inspector confirms that the flashing around the windows will keep rain and moisture out of your home. They’ll also verify that your windows meet current energy-efficiency requirements (important in California, where Title 24 energy standards are strict) so they properly keep your home cool in summer and warm in winter.
Do I need a permit to replace my roof?
Yes, you need a permit to replace your roof.
Because your home’s roofing is critical to the safety and comfort of your home, a permit is required to replace the roofing materials and underlayment. A roof keeps the elements out and has to be installed correctly to do its job. Pulling a permit ensures an inspection validates that the new roof was installed properly and to code, so you can rest assured it won’t leak or cause other issues.
Do I need a permit to replace my countertops?
No, you do not need a permit to replace your countertops.
You don’t need a building permit to replace countertops anywhere in your home – kitchen, bathroom, or otherwise. Countertops are a cosmetic element with no impact on the structural or other systems in your home, so they don’t require a permit to replace.
Do I need a permit to replace my HVAC system, heater, or air conditioner?
Yes, you need a permit to replace your HVAC system.
Your HVAC system is made up of a heater, an air conditioner, and ducting. Alongside plumbing, electrical, and gas, HVAC is the fourth major system in your home and requires a permit to replace, whether you’re replacing the entire system or just one component. An HVAC system connects to your electrical and gas lines, and the city wants to inspect that this was done correctly.
The same logic applies to a water heater: replacing one typically requires a permit because it ties into gas, electrical, and plumbing, and California has specific requirements for seismic strapping and venting.
If you’re only replacing ductwork, that may be possible without a permit since it doesn’t affect your home’s major systems. Just make sure you hire a competent professional: some old ducts have asbestos or fiberglass insulation that must be removed with care and disposed of properly.
Do I need a permit to convert my garage into a room?
Yes, you need a permit to convert a garage into a room.
Even the simplest garage conversion requires a city permit. If you’re adding electrical elements like outlets and lights, or plumbing elements like a bathroom, that clearly requires a permit.
But even if you’re just installing drywall to create a room in your garage, a permit is required so the city can inspect that you’ve installed appropriate insulation inside the walls and nailed the drywall to code.
As noted above, purely adding flooring over your garage slab won’t require a permit, and neither will simply painting the existing garage walls. But most homeowners turning a garage into livable space will need a permit so they can create a comfortable room with the right electrical, plumbing, and HVAC elements. (Converting a garage into a full living unit, an ADU, is a bigger project with its own permitting path.)
Do I need a permit to add a room, bedroom, or addition to my house?
Yes, you cannot add a room, bedroom, or addition to your house without a permit.
This is one of the most common permit questions we get, so to be clear: adding onto your house always requires a permit. Building a room addition means building all the systems in your home from the ground up (foundation, structural walls, roof, heating, lighting, and electrical), so of course it needs a permit and several inspections along the way to ensure the work is done to code.
The same is true whether you’re adding a bedroom, adding a bathroom, or simply expanding an existing room: you’re touching the structure and systems of the home, so a permit is required. You’ll also most likely need to hire an architect or draftsperson to prepare plans and submit them to the city building department for approval before work begins.
Trying to add a room without a permit is risky; unpermitted square footage can fail to appraise, complicate a home sale, void insurance claims, and lead to fines or forced removal if the city finds out.
Do I need a permit to replace my siding or stucco?
Yes, you need a permit to replace your siding.
Although siding isn’t structural and isn’t considered one of the home’s major systems, it’s very important for keeping your home weatherproof and watertight. Siding and other exterior materials like stucco need to be installed correctly to create a weathertight seal that keeps out rain and moisture.
A permit lets the city inspector verify the contractor installed the necessary paper or moisture barrier behind the siding, and that all nail holes are sealed appropriately so water can’t get in.
Do I need a permit to remove a wall in my house?
Yes, you generally need a permit to remove a wall, with a caveat.
Some walls can be removed without a permit and some can’t. Structural, load-bearing walls support the ceiling joists above and require both a permit and a structural engineer’s guidance to remove.
Other interior walls aren’t load-bearing and are purely separations between rooms. A permit may not be required for that kind of simple demolition, but the challenge is determining which walls are structural and which aren’t. A good contractor can look in your attic and tell you whether a wall is load-bearing and whether you’ll need a permit to remove it.
Do I need a permit to build a deck or patio?
Maybe, it depends on the size and height.
If you’re pouring a concrete patio at grade or building a basic wood deck low to the ground, you probably won’t need a permit. But if you’re building a deck with multiple levels, or one high enough to need steps down to the ground, you likely will.
A deck improved off the ground needs a foundation or footings buried in the ground, with framing between them and the deck. It also needs proper railings on the deck and stairs for safety. All of this must be done to code, so the city will want you to pull a permit so it can inspect these elements.
Frequently Asked Questions
What happens if you remodel without a permit?
If you complete work that required a permit and the city finds out, you can face stop-work orders, fines, and a requirement to open up finished work for inspection, or even tear it out. Unpermitted work also tends to surface during a home sale or refinance, where it can lower your appraisal, scare off buyers, or complicate insurance claims. It’s almost always cheaper to permit the work up front than to correct it later.
Can I add a room to my house without a permit?
No. Any room addition, bedroom addition, or expansion of your home’s footprint requires a permit because it affects the structure and systems of the house. Building an addition without a permit can result in fines, failed appraisals, and problems when you sell.
Do you need a permit to replace flooring in California?
No. Replacing flooring (carpet, laminate, vinyl, hardwood, or tile) is a cosmetic update that doesn’t require a permit anywhere in California. The exception is if the underlying subfloor or floor joists need structural repair.
Who is responsible for pulling the permit: me or my contractor?
Your licensed contractor should pull the permit for the work they’re performing, and in most cases it’s best that they do. When a contractor pulls the permit, they take on responsibility for the work meeting code. Be cautious if a contractor asks you to pull an owner-builder permit for a job they’re doing, that can shift liability onto you.
How much does a building permit cost?
Permit fees vary widely by city and by project scope, from under a hundred dollars for a minor plumbing or electrical permit to several thousand for a room addition, depending on valuation and required plan checks. Your local building department publishes its fee schedule, and your contractor can usually estimate the cost for your specific project.
Choosing the right contractor is essential for a successful remodeling project. To be matched with a trusted, pre-vetted contractor anywhere in California, contact GreatBuildz today at 888.668.2454 or submit our form to get started.
