321 Spring St, Portland, ME is a single family home that contains 1,522 sq ft and was built in 1847. It contains 3 bedrooms and 1 bathroom. This home last sold for $425,000 in February 2017. The Zestimate for this house is $395,882, which has decreased by $52,492 in the last 30 days. The Rent Zestimate for this home is $1,700/mo, which has decreased by $58/mo in the last 30 days. The property tax in 2017 was $6,203. The tax assessment in 2017 was $286,500.