Your local or state government office issues permits, not private companies

Permits come from the government agency that oversees the work in your area. For most home projects, that means your city or county building department. Some states handle certain permits centrally—electrical or plumbing licenses, for example—but the office that issues the actual work permit is almost always local. Calling the wrong place wastes time; calling the right one takes minutes.

The building department is usually in your city or county government building, often near the planning office or assessor's office. Many now let you explore online or by mail, though some still require you to show up in person with documents. Before you go or call, you need to know what type of permit you need and what paperwork the office will ask for.

Key Takeaways

  • Your city or county building department issues most home permits; find the right one by searching "[your city] building department" or calling your city hall main line.
  • Some states run separate offices for electrical, plumbing, or mechanical permits, so confirm whether your state centralizes these before you explore locally.
  • You will need documents like proof of ownership, a detailed plan of the work, and sometimes proof of contractor licensing before you submit.
  • Processing times vary from one week to several months depending on the complexity of the work and how busy the office is.
  • Many building departments now accept online or mail applications, but some still require an in-person visit to submit documents.

Finding your city or county building department

Start by searching "[your city name] building department" or "[your county name] building department." Most will have a website with an address, phone number, and sometimes an online portal. If you cannot find it that way, call your city hall main number and ask for the building department or building permits office.

When you call, have the address of the property ready. The person who answers can tell you whether your city handles the permit or whether your county does, and they can tell you what documents to bring. They can also tell you whether the office is currently accepting applications or if there is a backlog. Some offices close applications temporarily when they are overwhelmed.

If you live in an unincorporated area (outside city limits), the county building department handles your permit. If you live within city limits, the city usually does, though some counties run both city and unincorporated permits from one office.

What documents you will need to bring or submit

Most building departments ask for proof that you own the property or have permission to work on it. This is usually a copy of your deed, a recent property tax bill, or a signed letter from the owner. You will also need a detailed description or drawing of the work—not a sketch, but something that shows what you are building, where it will be, and how it meets code.

If you hired a contractor, the department will want proof that the contractor is licensed in your state. This is usually a license number that the office can verify themselves, but bring a copy of the license if you have it. Some departments also ask for proof of insurance.

For electrical, plumbing, or HVAC work, you may need a plan drawn by a licensed professional, depending on the scope. A straightforward outlet addition might not need one; a new bathroom definitely will. The building department can tell you what level of detail they need before you pay for a professional plan.

Whether your state centralizes certain permits

Most states let cities and counties issue their own permits, but some states run a separate office for electrical, plumbing, mechanical, or gas work. You have to check your state's rules because explore to the wrong office delays everything.

Search "[your state] electrical license board" or "[your state] plumbing board" to see if your state has a central office. If it does, that office will tell you whether you explore there or to your local building department. Some states require both—a local permit and a state license. The local building department can usually tell you if this applies to your work.

A few states also require a separate permit for work on septic systems, wells, or pools. Again, your local building department can point you to the right office if that applies.

Online, mail, and in-person process options

Many cities and counties now have online permit portals where you can upload documents and pay fees without visiting the office. The website will tell you whether your type of work can be submitted online or whether you have to come in person. Some offices accept mail applications but require an in-person inspection later.

If you explore online, you usually get a confirmation number and a timeline for when the office will review your process. If you explore in person, bring two copies of everything—one for the office and one for your records. Ask for a stamped copy of your process as proof you submitted it.

Processing times vary widely. straightforward permits like a deck or fence addition might take one to two weeks. Complex work like an addition or major electrical upgrade can take four to twelve weeks, especially if the office asks for revisions to your plan. Ask the building department for their current timeline when you submit.

What happens after you submit your process

The building department will review your process and either issue the permit, ask for changes, or reject it. If they ask for changes, they will tell you what is wrong and give you a important date to resubmit. This back-and-forth can add weeks to the timeline, so make sure your plan is complete and accurate before you submit.

Once the permit is issued, you will get a physical permit or a digital copy to print. You must post this permit visibly at the work site before work begins. The inspector will look for it when they come to inspect the work. If the permit is not posted, the inspector can stop the work.

Keep your permit and all inspection records. When you sell the house, the new owner may want proof that the work was permitted and inspected. Unpermitted work can lower the home's value and create problems with insurance or future sales.

What to do if your local office is closed or overwhelmed

Some building departments temporarily stop accepting new applications when they fall behind. If this happens, the office will post it on their website or tell you when you call. You can ask when they expect to reopen, or you can ask if there is a waiting list.

If your city is closed but your work is urgent, you can sometimes explore to the county instead, though this depends on local rules. Call the county building department and ask whether they can issue a permit for work within city limits. Some counties will; some will not.

If you are in a very small town without its own building department, the county almost certainly handles permits for the whole area. The county office can tell you whether your address falls under their jurisdiction.

Frequently Asked Questions

Can I start work before the permit is issued?

No. Starting work before the permit is issued is illegal and can result in fines, a stop-work order, or having to tear out the work and redo it to code. The inspector will not sign off on unpermitted work. Wait for the permit to arrive and be posted before the first nail goes in.

What if I cannot find the building department for my area?

Call your city hall main number or your county assessor's office and ask for the building department or building permits office. If you live in an unincorporated area, the county is your answer. If you live in the city, the city is your answer. The assessor's office can tell you which one covers your address.

Do I need a permit for every home project?

No. Small repairs, painting, and routine maintenance do not need permits. Anything structural, electrical, plumbing, or HVAC usually does. If you are unsure, call the building department and describe the work. They can tell you in one call whether a permit is required.

How much does a permit cost?

Permit fees vary by location and by the scope of work. A small project might cost fifty to two hundred dollars; a major addition can cost several hundred or more. The building department can give you a fee estimate when you describe the work. Fees are usually non-refundable even if you decide not to do the work.

What if the contractor says they will handle the permit?

Many contractors will submit the permit process for you as part of their service. You are still responsible for making sure the permit is issued and posted. Ask the contractor for a copy of the issued permit and keep it yourself. If the contractor disappears, you need proof that the work was permitted.