The Grenada Housing Authority is a government agency empowered to acquire land and construct low-income housing projects. All main population centers have been supplied with sewerage and piped-water facilities; in the mid-1980s, about three-fourths of the population had access to potable water. In the early 1980s, the latest point for which information is available, some 90% of all dwellings were detached houses. Nearly 75% of all housing units were owner occupied, 14% were rented, and 9% were occupied rent free. The most common construction material for homes was wood (70%), followed by concrete (12%), and wood and brick combined (7%).