A Certificate of Occupancy is a document from your local building department stating that a property meets code and is safe to live in
When you buy a home, the seller should have a Certificate of Occupancy (often called a CO) on file with the city or county. This document proves that the building passed inspection and complies with local building codes — electrical, plumbing, structural, fire safety, and habitability standards. Without one, you cannot legally occupy the property, and most lenders will not finance a purchase.
The certificate is issued after an inspector walks through the building and confirms it meets current code. The timing depends on the property type and your location. A new house gets a CO before the first owner moves in. An older home you are buying should already have one from years ago. A renovation or addition triggers a new inspection and a new CO for that work.
If a CO is missing or expired, you have a problem — one that can delay closing, kill a sale, or leave you liable for unpermitted work someone else did.
Key Takeaways
- A Certificate of Occupancy proves the building meets local code and is legal to occupy; most mortgage lenders require one before funding.
- The seller or builder should provide the CO before closing, and your title company or inspector will usually ask for it.
- If a CO is missing, the building department can issue a retroactive one after inspection, but this takes time and costs money.
- Unpermitted renovations or additions may not have a CO for that work, which can create liability and complicate future sales or insurance claims.
- A CO does not may provide the home is in perfect condition — it confirms code compliance at the time of inspection, not ongoing maintenance.
When you need a Certificate of Occupancy
You need a CO in three main situations. First, when you are buying a home — your lender will require proof that the building is legally occupiable, and your title company or inspector will ask the seller for it. Second, when you are doing permitted work like a room addition, deck, or major renovation — the contractor pulls a permit, work is inspected, and a new CO is issued for that work. Third, if you are buying a property that was recently converted (a commercial building turned into apartments, for example) or has had major unpermitted work, the city may require a new CO before you can close.
In practice, most home buyers never see the CO because it is already on file. Your inspector or title company confirms it exists and is current. Problems arise when it is missing — usually because the property is very old, or because work was done without a permit.
What happens if the Certificate of Occupancy is missing
If the seller cannot produce a CO, your lender may refuse to fund the loan. Title insurance may also exclude coverage for code violations. You have two paths forward: ask the seller to obtain a retroactive CO from the building department, or walk away from the deal.
A retroactive CO means the building department sends an inspector to verify the property meets current code, even though the original inspection happened years ago. This takes two to eight weeks depending on the jurisdiction and how backed up the department is. The seller usually pays for it, though you can negotiate. If the inspector finds violations — unpermitted work, electrical issues, structural problems — the seller must fix them before the CO is issued. That can be expensive and delay closing significantly.
Some jurisdictions issue a "Certificate of Compliance" or "Occupancy Permit" instead of a full CO, especially for older homes. These are less formal but serve the same purpose: proof that the building is safe and legal to occupy.
Unpermitted work and the Certificate of Occupancy
If the previous owner added a room, finished a basement, or installed a pool without pulling a permit, that work does not have a CO. When you buy the home, you inherit that liability. An inspector may flag it during your inspection. Your lender may refuse to close. Your homeowners insurance may deny a claim if something goes wrong with unpermitted work.
You can ask the seller to legalize the work retroactively — pulling a permit now, having it inspected, and getting a CO. This is more expensive than doing it right the first time, because the work is already done and may need modifications to meet current code. Some jurisdictions allow a "Certificate of Occupancy for Existing Structures" that acknowledges the work exists and is safe, even if it was not originally permitted.
If the seller refuses to legalize unpermitted work, you can sometimes negotiate a credit at closing to cover the cost yourself, or walk away. Do not ignore it — unpermitted work can complicate future sales, void insurance coverage, and create safety issues.
How to verify a Certificate of Occupancy before buying
Ask your real estate agent or title company to request the CO from the seller before you make an offer. Most sellers have it in their records or can get it from the building department. If the property is new construction, the builder should provide it before closing. If the property is old, the CO may be decades old, which is fine — it does not expire.
Your home inspector can also check the building department records during the inspection. Many jurisdictions allow online searches of permit and CO records by address. If you are buying in a state or county you are unfamiliar with, ask your real estate agent how to access these records.
If the CO is missing and the seller cannot locate it, request a retroactive inspection as a condition of your offer. Make clear in writing that closing is contingent on receiving a valid CO. This protects you and gives the seller time to arrange it.
The difference between a Certificate of Occupancy and other inspections
A CO is not the same as a home inspection. A home inspector is hired by you to look for problems — roof condition, plumbing leaks, electrical hazards, foundation cracks. A CO inspector is hired by the building department to verify code compliance at a specific point in time. The CO inspector checks that the structure, electrical, plumbing, and fire safety systems meet minimum standards. They do not assess maintenance, age, or wear.
A CO also is not the same as a title search or title insurance. Title insurance protects you against ownership disputes and liens. A CO protects you against occupying an unsafe or illegal building. Both matter, and both should be in place before you close.
What a Certificate of Occupancy does not cover
A CO confirms code compliance at the time of inspection. It does not may provide the home is in good condition, that all systems will last, or that future repairs will not be needed. It does not cover maintenance issues like a worn roof, old plumbing, or outdated electrical panels — only that those systems met code when inspected.
A CO also does not cover work done after the certificate was issued. If the previous owner added an unpermitted deck five years after the CO was issued, that deck is not covered by the original certificate. You would need a new CO or permit for that work.
Frequently Asked Questions
Does a Certificate of Occupancy expire?
No. A CO does not expire. Once issued, it remains valid indefinitely. However, if you do major renovations or additions, you will need a new CO for that work. The original CO for the main structure stays on file.
Can I buy a house without a Certificate of Occupancy?
Most lenders will not fund a loan without one. You could buy with cash, but you would assume all liability for code violations and unpermitted work. Title insurance may also exclude coverage. It is not worth the risk.
Who pays for a retroactive Certificate of Occupancy?
Typically the seller, since they are the ones who cannot produce the original. You can negotiate a credit at closing if the seller refuses. The cost varies by jurisdiction but usually ranges from a few hundred to a few thousand dollars, depending on whether violations are found and need fixing.
What if the inspector finds violations during a retroactive CO inspection?
The seller must fix them before the CO is issued. Common violations include unpermitted additions, electrical code issues, or missing safety features. Repairs can take weeks or months and may be expensive. You can renegotiate your offer or walk away if the cost is too high.
Do I need a new Certificate of Occupancy if I renovate my kitchen?
Not for a simple kitchen remodel. You only need a new CO if the work requires a permit — typically structural changes, electrical upgrades, plumbing work, or additions. A cosmetic remodel does not trigger a new inspection. Check your local building department to be sure.