Habitat for Humanity International is a nonprofit, ecumenical Christian housing ministry. Habitat works in partnership with people in need to build and renovate decent, affordable housing. The houses then are sold to those in need, Habitat's partner families, at no profit and with no interest charged. Partner families invest hundreds of hours of their own labor -- sweat equity -- into building their homes and the homes of others. Their mortgage payments go into a revolving Fund for Humanity that is used to build more houses.