Abstract: Apparatus for stabilizing and elevating the foundations of buildings of the type utilizing a foundation bracket which is positioned in supporting engagement with the building foundation. The apparatus includes a tubular guide sleeve and an upper head assembly from which one or more power cylinders are supported with their piston rods extending downwardly along side piling pipe sections which are driven into the ground through the guide sleeve adjacent to the foundation to form a support column. The piston rods are connected to a slip clamp which is constructed and arranged to grip a piling section and push it downwardly upon the downward, maximum power extension stroke of the piston rods, and to release the piling upon the upward, retraction stroke of the piston rods. Vertically extending connecting rods which support the upper head assembly are detachably connected at their lower ends to a lower cross arm unit attached to the foundation bracket.