Avesta Housing (formerly known as York Cumberland Housing) was founded in 1972. Over three decades it has grown into the largest non-profit housing agency in Maine. A non-profit organization, Avesta has developed over 1,700 units of affordable housing for itself and other entities. It currently owns over 1000 units in over 44 properties. The agency manages about 1300 units of housing including its own properties and properties owned by others. Avesta is led by a Board of Directors consisting of 14 members whose membership is drawn from a variety of banking, business, public, community, social service, and housing organizations. Avesta maintains administrative headquarters in Portland , Maine . It has a staff of about 65 full-time and part-time employees.