N.H. Rev. Stat. Ann. § 31:99

The selectmen of a town may grant a license in writing to any person to occupy a portion of any street, designated by distinct limits, for the purpose of laying thereon lumber and other materials for building purposes, but not for retail sale except as provided in RSA 31:100, for a time not exceeding 4 months, whenever they shall deem it necessary or proper, subject to such terms and conditions, to be expressed in the license, as the public convenience and safety may require.