What Is a Certificate of Occupancy and Do You Need One?

What it is

A Certificate of Occupancy (CO or C of O) is a document from your local building department that certifies a building or space is safe to occupy and complies with building codes, zoning laws, and other local regulations. It specifies the approved use — residential, commercial, retail, restaurant, warehouse, etc. For a more detailed walkthrough of the process, see our in-depth CO guide.

When you need one

New construction

Every new building needs a CO before anyone can occupy it. No CO, no tenants.

Change of use

Converting a space from one use to another, office to restaurant, retail to bar, warehouse to gym, triggers a new CO. Different uses have different code requirements.

Significant renovation

Major renovations involving structural changes, new plumbing, new electrical, or changes to exit routes often require an updated CO. Minor cosmetic changes usually do not.

Change of tenant (sometimes)

Some cities require a new CO whenever a new tenant moves in. Others only require one if the use changes. Check with your city building department.

Who issues it and what it costs

Your city's building department. Fees vary: NYC $100. Los Angeles $50 to $300 (included in building permit fees). Houston $50 to $150. Chicago $100 to $250. Miami $75 to $200. The fee isn't the expensive part, corrections from a failed inspection can cost thousands.

How long it takes

Without construction: 2 to 4 weeks (scheduling plus inspection plus issuance). With construction: the CO comes at the end of the building permit process, could be months.

What happens if you operate without one

Fines of $100 to $1,000 per day. Forced closure by a building inspector. Insurance voidance. Lease default. A CO violation is public record that can affect your ability to get other permits. Read more about the cascade of problems from missing permits.

Temporary Certificate of Occupancy

If your space is mostly ready but has minor outstanding items, the building department may issue a Temporary CO (TCO). TCOs expire, typically after 90 days. Don't let a TCO expire. The consequences are the same as operating without a CO.

How a CO fits into the permit timeline

The CO is typically the last permit you receive, because it requires all other inspections to be complete: fire, health, building, zoning. Everything else — business license, sales tax permit, sign permit — can be obtained in parallel. But you can't open without the CO.

Check all your requirements

A CO is one piece of the permit puzzle. Run the free permit checker to see every permit your business needs. Check requirements for restaurants in NYC or retail in Chicago.

And if you already have your CO and other permits, track the renewal dates so you don't let any of them lapse.