Dataset · as of July 2026
US Certificate of Occupancy Data — 1.6M records
1.6M certificate of occupancy records, including NYC DOB NOW and legacy CO loads — the record that a project actually finished and a building became occupiable.
What a record contains
- CO type (temporary, final, amended)
- Issue date
- Property address and jurisdiction
- Associated job or permit identifiers where published
How it is sourced
Buildings-department CO feeds, loaded and classified separately from permits so completions are never conflated with filings. Freshness by source is published on the freshness page; how records attach to parcels, with per-county match rates, on the data quality page.
Browse by state
Alabama · 8,610Arizona · 2,205,259Arkansas · 2,101,998California · 9,251,144Colorado · 2,474,824Florida · 10,508,100Idaho · 1,090,531Illinois · 1,862,572Indiana · 3,562,586Maryland · 2,393,027Massachusetts · 2,162,239Minnesota · 2,638,826Mississippi · 2,004,687Missouri · 198,844Nebraska · 1,150,007Nevada · 1,121,025New Jersey · 2,792,098New York · 3,755,154North Carolina · 5,820,119Ohio · 6,048,590Pennsylvania · 583,483Tennessee · 2,066,283Texas · 12,533,291Utah · 1,471,309Washington · 3,179,724Wisconsin · 3,503,872
Related datasets
47.1M+
Building permits
Permit records from 2,277 jurisdictions across 49 states + DC.
92M
Parcels
County assessor parcel records, owned outright — not licensed.
Get the certificates of occupancy dataset
Delivered through the web app, the REST API, or a bulk license. Look up any single property free on the report page.