21 Highland St, Newton, NH is a single family home that contains 1,855 sq ft and was built in 2016. It contains 3 bedrooms and 3 bathrooms. This home last sold for $335,900 in November 2016. The Zestimate for this house is $373,277, which has increased by $8,860 in the last 30 days. The Rent Zestimate for this home is $2,190/mo, which has increased by $50/mo in the last 30 days. The property tax in 2017 was $7,155. The tax assessment in 2017 was $269,200, an increase of 217% over the previous year.