Habitat for Humanity of Puerto Rico is a locally run affiliate of Habitat for Humanity International, a nonprofit 501c3 organization. Habitat for Humanity works in partnership with people in need to build and renovate decent, affordable housing. The houses are then sold to those in need at no profit and with no interest charged. Volunteers provide most of the labor, and individual and corporate donors provide money and materials to build Habitat houses. Partner families themselves invest hundreds of hours of 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. Hábitat for Humanity has more than 2,000 affiliates in the United States, Puerto Rico & Guam. It also has more than 100 affiliates in different countries around the world. 300,000 houses has been constructed, providing a safe and affordable home to more than 1.5 million people.