N.H. Code Admin. R. Env-Wq 1408.02
Any pre-existing nonconforming primary structure shall be repaired, renovated, or replaced in kind in accordance with RSA 483-B:11 only if the property owner can demonstrate that the structure has been maintained in a functional and intact condition in the 2 years immediately prior to the replacement.
Source. (See Revision Notes #1 and #2 at chapter heading for Env-Wq 1400) #12062 eff 12-17-16