Zestimate® Home Value: $705,000. 217 Halfmoon Pond Rd, Washington, NH is a single family home that contains 3,548 sq ft and was built in 1817. It contains 3 bedrooms and 2 bathrooms. The Zestimate for this house is $707,900, which has decreased by $40,740 in the last 30 days. The Rent Zestimate for this home is $3,280/mo, which has increased by $618/mo in the last 30 days.