What Is a Certificate of Occupancy in New York?
- Published 27 octobar 2026
- Last reviewed 27 octobar 2026
- 7 min read
- Quick answer
A certificate of occupancy (CO) is the document your city, town, or village issues to confirm that a building — or the part of it covered by a permit — has been inspected and complies with the New York State Uniform Code and the approved plans, and may be used for its stated purpose.
Outside New York City, state rules (19 NYCRR Part 1203) require every municipality to issue a certificate of occupancy or a certificate of compliance for any work done under a building permit and for any change of use. Permission to occupy work done under a permit is granted only through one of those certificates.
Most homeowners never think about their certificate of occupancy until someone asks for it — usually a buyer’s attorney, a lender, or an insurance company. At that point a missing or outdated CO can delay a closing by weeks. This guide explains what a CO is under New York rules, how it differs from a certificate of compliance, when you need one, and how common CO problems are fixed. It covers New York State outside New York City; New York City’s Department of Buildings runs its own system.
On This Page
01
Certificate of Occupancy vs. Certificate of Compliance vs. Temporary CO
02
When You Need a CO in New York
03
What Appears on a Certificate
04
How a CO Is Issued
05
Why COs Matter When You Buy, Sell, or Refinance
06
Common CO Problems and How They Are Fixed
07
CO Issues by Project Type
08
Selling Soon? Do a Pre-Listing CO Review
09
How to Check Whether a Property Has a CO
10
Frequently Asked Questions
Certificate of Occupancy vs. Certificate of Compliance vs. Temporary CO
| Document | What it confirms | Typical use |
|---|---|---|
| Certificate of occupancy (CO) | The building or portion of it complies with the code and approved plans and may be occupied for its stated use | New buildings, additions, and changes of use or occupancy |
| Certificate of compliance | Work done under a permit was completed in compliance with the approved construction documents and the code | Alterations such as decks, renovations, or systems work — the exact split between the two varies by municipality |
| Temporary certificate of occupancy | Part of a building may be occupied before all work is complete, for a limited period | Allowing move-in while minor items remain |
Local codes use slightly different language — some towns also say “certificate of completion” — so the name on your document matters less than whether it covers the work that exists on the property.
When You Need a CO in New York
New construction. A new house or building cannot be legally occupied until a CO is issued.
Work under a building permit. Additions, alterations, decks, pools, and similar permitted work end with a CO or a certificate of compliance.
Change of use or occupancy. Sending one answer at a time invites another round of review. One complete response is faster.
Change of use or occupancy. Converting a garage or basement into living space, adding an accessory apartment, or changing a commercial use requires a new certificate reflecting the new use. If you are planning a second unit, read about accessory apartment permitsfirst.
What Appears on a Certificate
State rules require certain information on every CO or certificate of compliance, including the building permit number and date where applicable; the name, address, and tax map number of the property; a description of the portion of the structure covered when the certificate does not apply to the whole building; the use and occupancy classification; and the signature of the issuing official with the date of issue. When you review a property’s CO, check that the description matches what is actually there — the number of bedrooms, a finished basement, an addition, or a second unit.
How a CO Is Issued
All required inspections pass. The code enforcement official must inspect the building or work before issuing the certificate.
Supporting documents are received. Depending on the work, these can include an electrical inspection certificate, engineer’s or architect’s letters, flood-zone certifications, and approvals from other agencies.
Other agency sign-offs are in place. In Putnam County, for example, the county health department must issue a Certificate of Construction Compliance for a new septic system before the building inspector can issue the CO — see our guide to the perc test in Putnam County for how that process starts.
The certificate is issued and recorded in the building department’s property file.
Why COs Matter When You Buy, Sell, or Refinance
Title and municipal searches commonly compare the building department file with the property. When they find a finished basement, an extra bathroom, a deck, or an addition with no permit or certificate behind it, the buyer’s attorney or lender may require the issue to be resolved before closing, ask for a price reduction, or require money to be held in escrow. Insurance claims can also become complicated when damaged work was never permitted. Resolving CO issues before listing is almost always cheaper and faster than resolving them under a closing deadline.
Common CO Problems and How They Are Fixed
| Problem | What usually fixes it |
|---|---|
| Open permit — work finished, final inspection never done | Schedule and pass the final inspection; provide any missing documents |
| Expired permit | Renew or re-open the permit under local rules, then complete inspections |
| Failed final inspection | Correct the listed items and re-inspect |
| Missing documents (electrical certificate, engineer letter) | Obtain the document from the inspection agency or professional |
| Work done without a permit | A legalization: as-built drawings, a retroactive permit, inspections, then a new certificate — see how to legalize unpermitted work |
| Older house that predates the town's CO requirements | Some municipalities issue a letter or certificate for pre-existing structures [VERIFY local practice] |
CO Issues by Project Type
Certain kinds of work account for most of the CO problems that surface at closing. If the property has any of these, check the file first.
Finished basements. Often finished years after the house was built, sometimes without a permit. Inspectors look closely at emergency escape openings, ceiling height, smoke and carbon monoxide alarms, and electrical work.
Decks and porches. Frequently permitted but never given a final inspection. Footings, the ledger connection to the house, stairs, and guardrails are the usual inspection points, and hidden connections may need to be exposed.
Swimming pools. Pools carry their own safety requirements, including barriers and, for many pools, alarms, and a missed final inspection leaves the permit open.
Additions and enclosed porches. Beyond the building code, the addition must comply with zoning — a setback or coverage problem means a variance before any certificate can be issued.
Accessory apartments. A second unit is a change of use and needs its own approval and certificate; an unapproved unit usually requires legalization.
Solar panels, generators, and major electrical work. These often need an electrical inspection certificate on file before the department will close the permit.
Selling Soon? Do a Pre-Listing CO Review
Pull the building department file before you list — not after the buyer’s search comes back.
Walk the house with the file in hand and note every finished space, deck, pool, or addition that is not covered.
Start the longest item first: legalizations and variances take far longer than final inspections.
Give your attorney a written status so it can be disclosed accurately and the buyer is not surprised.
How to Check Whether a Property Has a CO
Ask the building department for the property’s permit and certificate records. Many municipalities use a records or Freedom of Information Law request form.
Compare each certificate with the property as it exists today — rooms, finished areas, decks, pools, and any second unit.
List any open or expired permits and any work with no permit on record.
Decide whether each item needs a final inspection, missing documents, or a legalization — and start with the item that will take longest.
Frequently Asked Questions
Can I live in a house without a certificate of occupancy?
For new construction or work done under a building permit, permission to occupy is granted only through a certificate of occupancy or certificate of compliance. Occupying without one can lead to enforcement and insurance problems.
Is a certificate of occupancy the same as a building permit?
No. A building permit authorizes work to begin; the certificate of occupancy or certificate of compliance confirms, after inspection, that the finished work complies and may be used.
Does a certificate of occupancy expire?
A CO generally remains valid for the use and structure it describes. New work or a change of use needs its own certificate. A certificate issued in error or on incorrect information can be suspended or revoked.
Who issues a CO in New York?
The code enforcement official of the city, town, or village with jurisdiction — for property in a village, usually the village building department.
How long does it take to get a CO?
If inspections pass and documents are in place, issuance can be quick. Old open permits, missing documents, or unpermitted work take longer. For how permits themselves are timed, see how long a building permit takes in Westchester.
Do sheds and fences need a certificate?
Only if the work needed a building permit. State rules allow municipalities to exempt small detached storage sheds (up to 144 square feet) and most fences from permits, but local zoning — setbacks and height limits — still applies. Check your municipality’s code.
Is a temporary CO enough to close on a sale?
Sometimes, depending on the buyer, lender, and the conditions attached. It is issued for a limited period and should be converted to a final certificate.
CO problem holding up a sale or refinance?
Our certificate of occupancy help service searches the file, lists every open item, and coordinates the inspections needed to issue the certificate — including certificate of occupancy help in Orange County and across the Hudson Valley.