40 Dyer St, South Portland, ME is a single family home that contains 2,287 sq ft and was built in 1830. It contains 4 bedrooms and 2.5 bathrooms. This home last sold for $293,500 in July 2016. The Zestimate for this house is $429,128, which has increased by $8,789 in the last 30 days. The Rent Zestimate for this home is $1,950/mo. The property tax in 2017 was $4,925. The tax assessment in 2017 was $273,600, an increase of 3.0% over the previous year.