N.Y.C. Admin. Code § 20-387: § 20-387 License required.

(a) No person shall solicit, canvass, sell, perform or obtain a home improvement contract as a contractor from an owner without a license therefor.

(b) A license issued pursuant to this subchapter may not be construed to authorize the licensee to perform any particular type of work or engage in any kind of business which is reserved to qualified licensees under separate provisions of state or local law, nor shall any license or authority other than that which is issued or permitted pursuant to this subchapter authorize engaging in the home improvement business.