N.Y. Comp. Codes R. & Regs. tit. 19, § 1202.2
(b) Applications for a building permit or demolition permit may be obtained from any office of the Department of State. A completed application may be delivered to any office of the department or be mailed to its office in Albany, and must include:
(f) A building permit issued pursuant to this Part for the purpose of erecting, constructing, enlarging, altering, improving, or relocating any building or structure or for the purpose of installing heating equipment shall expire two years from the date of issuance or upon the issuance of a certificate of occupancy (other than a temporary certificate of occupancy) or upon the issuance of a certificate of completion, whichever occurs first. A demolition permit issued pursuant to this Part for the purpose of removing or demolishing any building or structure shall expire six months from the date of issuance or upon the issuance of a certificate of completion of the permitted work, whichever occurs first. A building permit may, upon written request, be renewed for successive one year periods. A demolition permit may, upon written request, be renewed for successive six month periods. Renewals of permits may be granted only if: