321 Salmon Ave, Portsmouth, NH is a mobile / manufactured home that contains 1,600 sq ft and was built in 2016. It contains 2 bedrooms and 2 bathrooms. This home last sold for $20,000 in January 2016. The Zestimate for this house is $288,387, which has increased by $9,078 in the last 30 days. The Rent Zestimate for this home is $1,700/mo. The property tax in 2017 was $3,840. The tax assessment in 2017 was $249,700, an increase of 48.8% over the previous year.