Certificates of Occupancy
NYC Admin. Code Title 28, Ch. 1, Art. 118 (§ 28-118.1 et seq.)
No building or open lot may be used or occupied without a certificate of occupancy issued by the Commissioner (§ 28-118.1); the C of O is issued after the Commissioner inspects and determines the building substantially conforms to the approved construction documents, the Construction Codes, and other applicable laws and rules (§ 28-118.6), and the certificate states the permitted use and occupancy in accordance with the code and the Zoning Resolution. No change inconsistent with the last-issued certificate of occupancy may be made until a new certificate is issued (§ 28-118.3.2), and the owner must post a copy of the C of O conspicuously, except buildings occupied entirely as Group R-3 (§ 28-118.19).
Who must comply
Other DOB regulations
Special Inspectors & Special Inspection Agencies
1 RCNY § 101-06
OTCR Material Approval
1 RCNY § 101-12
ADA Title III (2010 Standards)
Americans with Disabilities Act Title III, 42 U.S.C. § 12181 et seq.; 28 C.F.R. Part 36 (2010 ADA Standards for Accessible Design)
LL157 Natural Gas Detectors
Local Law 157 of 2016, as amended by Local Law 102 of 2025 (Int. 1281-2025); NYC Admin. Code §28-315.2.4 / §27-2045 — natural gas detecting devices
Office Sprinkler Retrofit (LL26/2004)
Local Law 26 of 2004 (amending NYC Administrative Code / NYC Building Code)
LL26/04 High-Rise Office Sprinklers
Local Law 26 of 2004 (NYC Admin. Code 28-315.2 et seq.)
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