The owner of improved land adjoining unimproved land of another, having erected a division fence, may demand and recover of the owner of such adjoining land, whenever he begins to improve the same, the value of such part of the fence as upon a division then or previously made it was his duty to build.
N.H. Rev. Stat. Ann. § 473:11
Improving Wild Land
Source
Official source: New Hampshire General Court. Reproduced from public-domain New Hampshire statutes; confirm against the official source for the current text. Not legal advice.