Certificate of Occupancy
An official document issued by the local government confirming a building meets code and is legally safe to occupy: without it, nobody can legally move in or open for business, no matter how finished the building looks.
Why it matters
A building owner can't legally use a space without one, which makes it one of the few approvals that can bring an entire project's business plan to a stop even after construction is otherwise finished.
On a real project
A retail tenant plans a grand opening for a specific date, but the local building department's final inspection turns up a mislabeled fire exit sign. The certificate of occupancy is held up until it's corrected, and the opening has to be pushed back a week.
Who this matters most to
A Superintendent coordinates the final inspections that lead to the certificate, since it's the culmination of every code-related item on the job. A Project Manager tracks it closely because so much else, the owner's opening plans, final payment, insurance, is waiting on that one document.
Where this goes wrong
A contractor tells the owner the building is "ready to open" based on substantial completion, without confirming the certificate of occupancy has actually been issued. The owner schedules a public opening event, and the local building department's final inspection turns up an issue that delays the certificate, forcing an embarrassing, last-minute postponement of an event people were already invited to.