Habitat for Humanity St. Charles County affiliate. Advocates for making home-ownership a possibility for all. Habitat St. Charles builds safe, decent and affordable homes with hard working families in St.Charles Habitat for Humanity is a nonprofit, ecumenical Christian housing ministry dedicated to eliminating substandard housing and homelessness worldwide and to making adequate, affordable shelter a matter of conscience and action. Habitat invites people from all faiths and walks of life to work together in partnership, building houses with families in need.