55 Mammoth Rd, Londonderry, NH is a single family home that contains 1,314 sq ft and was built in 1971. It contains 3 bedrooms and 1.5 bathrooms. This home last sold for $217,000 in June 2015. The Zestimate for this house is $293,724, which has increased by $6,134 in the last 30 days. The Rent Zestimate for this home is $1,850/mo, which has decreased by $50/mo in the last 30 days. The property tax in 2017 was $5,500. The tax assessment in 2017 was $254,500, an increase of 0.3% over the previous year.