Certificate of Occupancy (CO)
A document issued by a local building authority certifying that a structure complies with building codes and is safe and legal to occupy. Often required before a lender will fund or convert a construction or rehab loan.
A certificate of occupancy (CO) is the local government's official sign-off that a building is code-compliant and legally habitable for its intended use. Issued by the city or county building department after final inspections pass, it's the document that turns a finished (or renovated) structure into a property that can be legally occupied, rented, or sold.
When a CO comes into play
- New construction — a CO is issued once the build passes final inspection; no one may legally occupy the building before it.
- Major rehab / change of use — converting a single-family into a duplex, or commercial into residential, typically requires a new or amended CO.
- Some municipalities require a CO (or a resale certificate) at every sale or new tenancy, even with no work done.
Why it matters in investor lending
Lenders care because the CO directly affects collateral value and the exit:
- A new construction loan often won't release the final draw — or convert to permanent financing via a refinance takeout — until the CO is issued.
- A DSCR loan needs the property to be legally rentable; no CO can mean no legal rent, no DSCR, no loan.
- A fix-and-flip buyer typically can't close a sale on a property that lacks a required CO.
A worked example
Builder finishes a new spec home on a construction loan.
Final inspections pass → city issues the CO.
This unlocks:
• the final construction draw
• the takeout DSCR refinance (now a legally occupiable rental)
• or a clean sale to an end buyer
No CO = none of the above can happen.
How it's used in investor lending
For ground-up and heavy-rehab deals, treat the CO as a milestone in your timeline and your loan. Confirm with the building department what triggers a CO in that jurisdiction (rules vary widely), since an unexpected CO requirement can strand a deal between construction and permanent financing. For buy-and-hold rentals, verify a valid CO exists for the current use before closing — buying a property that's illegally configured (e.g., an unpermitted basement unit) can wreck both your rent roll and your DSCR.
This is general information, not legal advice.
Frequently asked questions
Do I need a certificate of occupancy to refinance into a DSCR loan?
Usually yes for new construction or a property after a major rehab or change of use. The DSCR loan needs the property to be legally rentable, and a valid CO is the proof. The takeout refinance on a construction loan typically can't close until the CO is issued. For existing rentals already in legal use, a new CO often isn't needed.
What happens if a property doesn't have a required CO?
It may not be legally occupiable, which can block rental income, stall a construction-to-permanent refinance, and prevent a sale. Buying a property with an unpermitted unit or no valid CO for its current use can undermine your rent roll and DSCR. Always verify CO status before closing on a deal that depends on legal occupancy.
Who issues the certificate of occupancy?
The local building department of the city or county where the property is located, after the structure passes its final building, electrical, plumbing, and related inspections. Requirements and triggers vary widely by municipality, so confirm the local rules early on construction and change-of-use projects.