What is a Certificate of Occupancy and why does it matter?
Short Answer
A Certificate of Occupancy (CO) is documentation showing that a building has passed the required inspections and is authorized for occupancy for its approved use. For a buyer, the important question is not just whether the house has a CO, but whether the property has the correct approvals for what is actually being used and advertised today. Monroe County's Building Department handles COs as part of its permitting system.
Why the Certificate of Occupancy Matters in the Florida Keys
Older Keys properties can have complicated permitting histories. A property might have an original house, an enclosed porch, an addition, a converted garage, a guest area, a downstairs enclosure, a pool, a dock, a boat lift, a seawall, or a previous renovation, and some of those improvements may have required separate permits. A buyer should compare what physically exists today against what county records show was legally permitted.
The discrepancy between what you see and what is on the books is the most common and most costly surprise in Keys real estate. An MLS listing might say 3-bedroom, 2-bath home plus guest suite, but county records show only a 2-bedroom, 1-bath legally permitted residence. That can create problems with financing, insurance, appraisal, future resale, code compliance, rental licensing, renovations, and property value.
A CO Is Not a Home Inspection
Do not confuse a Certificate of Occupancy with a home inspection. A CO is not a substitute for a home inspection. The CO primarily addresses building and code approval, while a home inspection examines physical condition. A property can be legally permitted but still need roof, electrical, plumbing, foundation, seawall, or HVAC work. I always tell my buyers: get both the permit history check and a full home inspection from a licensed inspector. With my own home inspector license, I review every inspection report personally and compare it against the county records so nothing falls through the cracks.
What a Buyer Should Investigate
Before you commit to a property, ask for and review the following:
- Certificate of Occupancy for the main structure and any additions
- Building permits for all improvements, renovations, and additions
- Final inspections to confirm permitted work was signed off
- Open permits that could signal unfinished or unapproved work
- Expired permits that may need renewal or replacement
- Code cases or violations on file with the county
- Certificates for additions such as enclosed porches, guest suites, or garages
- Permits for pools, spas, or other water features
- Permits for docks, boat lifts, and marine structures
- Seawall permits for any shoreline improvements
- Electrical permits for significant electrical work
- Sewer and septic records to confirm proper wastewater disposal
Monroe County's permitting and code portal allows the public to search permit, property, and code-compliance information online. I recommend every buyer or their agent run a thorough search before writing an offer. A few minutes on the county portal can prevent months of headaches after closing.
Steve's Advice
Steve Conley
Principal, Conley Sales Group at COMPASS
After 30-plus years in the Florida Keys real estate market, including holding a Florida contractor license and home inspector license alongside my real estate license, I approach Certificates of Occupancy differently than most agents. I have seen too many buyers fall in love with a listing that says three bedrooms, two baths, plus a guest suite, only to pull the Monroe County permitting records and discover the legally permitted structure is a two-bedroom, one-bath residence. That discrepancy does not just affect resale value; it affects financing, insurance, windstorm coverage, rental licensing, and your ability to renovate in the future. My practical advice: before you make an offer, have your agent or title company pull the building permit history and check what CO was actually issued and whether it matches what is being advertised today. If there are discrepancies, get a quote from a local contractor on what it would take to bring the unpermitted improvements into compliance or obtain retroactive permits. That one step has saved my buyers from six-figure surprises more times than I can count.
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