N.H. Rev. Stat. § 147:17
Whenever a building, tenement or room occupied as a dwelling or schoolroom, or any cellar or other appurtenance connected therewith, has become the source of danger to the health of its occupants or others from want of cleanliness the health officers may order the owner, the owner's agents or the occupants, or any of them, to cleanse and put the same in proper sanitary condition, and the occupants to quit the same, within a time limited. If the person so ordered does not cleanse the same as ordered the health officers may do so, and may recover the expense thereof, together with their fees, of the owner; or they may order the same to be closed and to remain so until properly cleansed. Any person who shall fail to comply with an order of the health officers made under the authority of this section, after receiving due notice thereof, shall be guilty of a misdemeanor.
RSA 147:17
1887, 62:3. PS 108:18. PL 140 :16. RL 165:16. RSA 147:17. 1973, 528:58. 1998, 318:11, eff. Aug. 25, 1998.