Abstract: A device for supporting a building structure or the like includes an elongate shaft which is of square cross section and has a short length of screw flight at a lower end and the male screw threaded portion at an upper end extending coaxially with the shaft. A stabilizer in the form of a sleeve arranged to closely surround the square shaft together with three wings to be hammered downwardly into the ground surrounding the shaft after the shaft is screwed into the ground. Various heads can be provided including particularly a building support head in the form of a sleeve with a female screw thread at one end for attachment to the threaded portion of the shaft and a plate separate from the sleeve which can swivel relative to the sleeve to allow adjustment of the height.