23 Thornton Ave, South Portland, ME is a single family home that contains 792 sq ft and was built in 1926. It contains 2 bedrooms and 1 bathroom. This home last sold for $195,000 in June 2017. The Zestimate for this house is $198,350, which has decreased by $3,354 in the last 30 days. The Rent Zestimate for this home is $1,600/mo. The property tax in 2017 was $2,740. The tax assessment in 2017 was $152,200.