N.H. Rev. Stat. Ann. § 540-A:3
II. No landlord shall willfully seize, hold, or otherwise directly or indirectly deny a tenant access to and possession of such tenant's rented or leased premises, other than through proper judicial process.
(c) A landlord may remove, at the expense of the item's owner, any property that is located in a posted no-parking area, is unregistered or inoperable, or is parked or stored in a manner prohibited under the terms of a lease agreement.
II-b. Prior to removing an item pursuant to paragraph II-a, the landlord shall provide notice as follows:
(b) In cases under RSA 540-A:3, II-a(b), the landlord shall provide written notice no fewer than 48 hours prior to removing the property by:
(c) In cases under RSA 540-A:3, II-a(c), the landlord shall provide the following notices to the tenant prior to removing the property:
(1) First notice, at least 7 days prior to removal of the item, by:
(A) Placing a written notice on the item; and
(B) If the landlord knows the identity of the tenant who owns or possesses the item, placing a written notice on the door of such tenant's unit; or
(C) If the landlord does not know the identify of the tenant who owns or possesses the item, placing a written notice in a conspicuous location in one common area of each building in the apartment complex; and
(2) Final notice, at least 24 hours, but not more than 48 hours, prior to removal of the item, by:
(A) Placing a written notice on the item; and
(B) If the landlord knows the identity of the tenant who owns or possess the item, placing a written notice on the door of such tenant's unit; or
(C) If the landlord does not know the identity of the tenant who owns or possesses the item, placing a notice in a conspicuous location in one common area of each building in the apartment complex.
II-c. A landlord who removes a tenant's property pursuant to paragraphs II-a and II-b shall not initiate any possessory action based on the tenant's failure to remove the item; provided that if such failure caused substantial damage to the property of the landlord or another tenant, or injury to another person, the landlord may initiate eviction pursuant to RSA 540:2, II(b) or (d).
II-a. Notwithstanding paragraph II, and subject to the notice requirements of paragraph II-b:
IV. No landlord shall willfully enter into the premises of the tenant without prior consent, other than to make emergency repairs.
IV-a. Entry to make emergency repairs as authorized by RSA 540-A:3, IV includes, but is not limited to, entry by the landlord to evaluate, formulate a plan for remediation of, or engage in emergency remediation of an infestation of rodents or insects, including bed bugs, provided such infestation-related emergency entry took place within 72 hours of the time that the landlord first received notice of the infestation.
V. No tenant shall willfully refuse the landlord access to the premises to make necessary repairs, or to perform other reasonable and lawful functions commonly associated with the ownership of rental property, at a reasonable time after notice which is adequate under the circumstances.
(b) Evaluate whether bedbugs are present after the landlord has received notice that bed bugs are present in a dwelling unit adjacent to the premises or a dwelling unit that is directly above or below the premises, provided the landlord gives the tenant 48 hours written notice of his or her need to enter the premises to evaluate whether bed bugs are present.
V-c. No tenant shall willfully refuse to comply with reasonable written instructions from a landlord or pest control operator to prepare the dwelling unit for remediation of an infestation of insects or rodents, including bed bugs, provided that such instructions are given to an adult member of the tenant household such that the tenant household has a reasonable opportunity to comply, and in all cases at least 72 hours prior to remediation.
V-d. Notwithstanding any other provision of this chapter, a landlord may only enter a tenant's dwelling unit without the consent of the tenant:
V-a. No landlord shall willfully fail to investigate a tenant's report of an infestation of insects, including bed bugs, or rodents in the tenant's rented or leased premises, within 7 days of receiving notice of such alleged infestation from the tenant or a municipal health or housing code authority, or fail to take reasonable measures to remediate an infestation.
V-b. No tenant shall willfully refuse the landlord access to the premises to:
Source. 1979, 305:1. 1991, 373:2, eff. Jan. 1, 1992. 1998, 25:8. 2001, 277:2. 2003, 271:1, eff. Jan. 1, 2004. 2011, 247:1, eff. Jan. 1, 2012. 2013, 48:4, 5, eff. Jan. 1, 2014. 2015, 225:1, eff. Jan. 1, 2016. 2024, 46:1, eff. Jan. 1, 2025; 370:4, eff. Jan. 1, 2025. 2025, 176:1, eff. Jan. 1, 2026.