N.Y.C. Charter § 1521: Section 1521. Right of entry.

The commissioner or any assessor may, in accordance with law, enter upon real property and into buildings and structures at all reasonable times to ascertain the character of the property. Refusal by the owner or the agent of such owner to permit such entry shall be a misdemeanor triable by a judge of the criminal court of the city of New York and punishable by not more than thirty days' imprisonment or a fine of not more than fifty dollars, or both.