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Certificate of Occupancy: What It Is & How to Get One
A certificate of occupancy (CO) is the local government's confirmation that a building is safe and legal to occupy. When you need one and how to get it.
Short answer: a certificate of occupancy (CO) is the document your local building authority issues to confirm that a building is safe to occupy and legal to use for its stated purpose. It is granted after the final inspections pass, and in most places you cannot legally move in, open for business, or rent the space without it. Here is when a CO is required, how the process works step by step, and what happens if you occupy a building without one.
What Is a Certificate of Occupancy?
A certificate of occupancy is an official document from the local building department certifying two things: that the building complies with the codes that apply to it, and that it is approved for a specific use, such as a single-family home, an apartment building, a restaurant, or a warehouse.
A typical CO states the property address, the legal use and occupancy classification, the maximum number of occupants for commercial space, and the date of approval. The office that issues it is the same authority that issued the building permit, the AHJ (Authority Having Jurisdiction), usually your city or county building department.
The CO is the end of the permit chain. A building permit authorizes the work, inspections verify it, and the certificate of occupancy declares the finished building legal to use.
When Is a Certificate of Occupancy Required?
Requirements are set locally, so the exact triggers vary by city, but a CO is commonly required in these situations:
- New construction. Every new building needs a CO before anyone can occupy it.
- Change of use. Converting a warehouse to apartments, a house to a daycare, or a retail space to a restaurant requires a new CO for the new use.
- Major renovations or additions. Work that changes the building's size, layout, exits, or occupancy load often triggers an updated CO.
- Change of ownership or tenancy. Some cities require a new or reissued CO when a commercial space changes hands or a rental property turns over.
- Rental licensing. Many jurisdictions require a valid CO, or a similar habitability certificate, before a unit can be legally rented.
Small interior remodels that do not change the use or occupancy usually do not require a new CO. The permit for that work is still closed out with a final inspection; there is just no new certificate. When in doubt, the building department that covers the property is the only authoritative source.
How to Get a Certificate of Occupancy
The CO process rides on top of the permit and inspection process. In most cities it looks like this:
- Finish the permitted work. All construction covered by the building permit and the trade permits (electrical, plumbing, mechanical) has to be complete.
- Request the final inspections. Schedule finals with the building department. Larger projects may need separate sign-offs for building, electrical, plumbing, mechanical, and fire.
- Pass each inspection. Inspectors check the finished work against the approved plans and the adopted code. Anything flagged has to be corrected and re-inspected.
- Clear any related approvals. Depending on the project, zoning, fire marshal, health department, or public works approvals may need to be in place first.
- Apply and pay the fee. Some cities issue the CO automatically once finals pass; others require a short application and a fee, commonly somewhere between about $50 and a few hundred dollars.
- Receive the certificate. The department issues the CO, and the building is legal to occupy for the stated use. Keep it with your property records; buyers, lenders, and insurers ask for it.
Timing depends on the city and the inspection backlog. If the work is done and passes on the first visit, a CO can be issued within days; correction lists and re-inspections are what stretch it into weeks.
What the Final Inspection Checks
The certificate of occupancy inspection is a last, whole-building review. Inspectors are typically looking at:
- Life safety basics: exits, stair rails, guardrails, smoke and carbon monoxide detectors
- That the finished construction matches the approved plans
- Working electrical, plumbing, heating, and cooling systems
- Fire protection where required: rated walls and doors, sprinklers, alarms, extinguishers
- Accessibility requirements for commercial and multifamily buildings
- Site items such as the address posted, grading, and a safe path to the entrance
What Happens If You Occupy Without a CO?
Moving in or opening for business without a required certificate of occupancy is a code violation, and the consequences look a lot like those for unpermitted work:
- Fines and violations. Cities can issue citations for occupying without a CO, and many charge per day until it is resolved.
- An order to vacate. The authority can legally require occupants to leave until the certificate is issued.
- Utility problems. Some utilities will not set permanent service without a CO.
- Unenforceable leases. In some states, a landlord renting a unit without a required CO cannot enforce the lease or may have to return rent.
- Sale and financing trouble. Lenders, insurers, and buyers ask for the CO; a missing one can stall a closing or lower the price.
Temporary Certificate of Occupancy (TCO)
A temporary certificate of occupancy lets you occupy all or part of a building before every last item is complete, when the space is safe and the remaining work is minor. TCOs are common on larger projects, for example opening the finished floors of a building while upper floors are still being completed.
A TCO expires, usually after 30 to 180 days depending on the city, and can sometimes be renewed. The open items have to be finished and inspected before the permanent CO is issued. Cities often hold a deposit or bond until that happens.
Certificate of Occupancy vs. Certificate of Completion
The two documents close out different things:
| Document | What It Certifies | When You Get It |
|---|---|---|
| Certificate of occupancy | The building is code-compliant and legal to occupy for a stated use | New construction, change of use, and other occupancy-level changes |
| Certificate of completion | A specific permitted project passed its final inspection | Renovations and repairs that do not change the use or occupancy |
A kitchen remodel typically ends with a certificate of completion, or simply a finaled permit. A new house or a converted duplex ends with a certificate of occupancy.
All of this activity shows up in the public permit record. Permit Ledger tracks residential permits across 338 US cities and publishes a free weekly read for each one, so you can see how much work is being permitted in markets like Phoenix, Seattle, and San Diego.
Frequently asked questions
What is a certificate of occupancy?
A certificate of occupancy (CO) is an official document from the local building department certifying that a building complies with applicable codes and is approved for a specific use, such as residential or commercial. It is issued after final inspections pass, and it is what makes a building legal to occupy.
How do you get a certificate of occupancy?
Finish all permitted work, schedule the final inspections with your building department, pass each one, clear any related approvals such as fire or zoning, then apply and pay the fee if your city requires one. The department issues the CO once everything is signed off. If the work passes on the first visit, it can take only days.
When is a certificate of occupancy required?
Most commonly for new construction, a change of use (such as converting a warehouse to apartments), major renovations or additions that change occupancy, and in some cities when a commercial space changes tenants or a rental unit turns over. Small remodels that do not change the use usually do not need a new CO.
How much does a certificate of occupancy cost?
The certificate itself is usually inexpensive, commonly between about $50 and a few hundred dollars depending on the city and building type. The real cost is the work required to pass the final inspections. Some cities include the CO in the original permit fee.
Can you move into a house without a certificate of occupancy?
Not legally, if one is required. Occupying without a CO is a code violation that can bring daily fines and even an order to vacate, and some utilities will not set permanent service without it. For an existing home with no change of use, a new CO is usually not required to move in.
What is a temporary certificate of occupancy?
A temporary certificate of occupancy (TCO) allows a building, or part of it, to be occupied before all work is complete, when the space is safe and only minor items remain. TCOs expire, typically after 30 to 180 days, and the remaining work must be finished and inspected before the permanent CO is issued.
Is a certificate of occupancy the same as a building permit?
No. A building permit authorizes construction work before it starts, and the certificate of occupancy is issued after the work passes final inspection, certifying the building is legal to occupy. The permit opens the process; the CO closes it.
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