According to redfin, the lot

[meadandale]

According to redfin, the lot is over 1/2 acre.

I don’t see that by the pictures but maybe there is more ‘usable’ land behind the retaining wall?

If indeed it is over a 1/4 acre lot, that’s why the price is so high. 1/4-1/2 acre in an urban environment, even NH, is worth more than elsewhere.

http://www.redfin.com/stingray/do/printable-listing?listing-id=1565816