What Is a Certificate of Occupancy?
A Certificate of Occupancy (CO) is the building department's official approval for you to occupy and use a building. No CO, no occupancy — it's the final milestone that confirms your project was built according to the approved plans and code.
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When you need one
New construction always requires a CO. Major renovations, change of occupancy (e.g., retail to restaurant), and additions typically do too. Some jurisdictions issue temporary COs that allow partial occupancy while minor items are completed.
How to get it
After construction is complete, you request final inspections from all disciplines — building, electrical, plumbing, mechanical, fire. Each must pass. The building department verifies all permit conditions are met, all special inspection reports are filed, and all fees are paid. Then they issue the CO.
What delays it
Failed final inspections (the most common cause), missing special inspection reports, unpaid fees, uncompleted offsite improvements, and landscaping/irrigation not matching approved plans. The punch list items that seem minor during construction become CO blockers at the end. Start your CO checklist 60 days before projected completion.
The bottom line
The CO is your legal permission to occupy the building. Start the checklist 60 days early — failed finals and missing reports are the top delays.
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