Abstract: The present invention features an adjustable corner assembly for a boat-lift. The corner assembly of this invention may be designed to replace corner posts of other boat-lift mechanisms. It can also be designed as part of a boat-lift frame. In either capacity, it is very flexible in its adjustment, so that the lifting frame may be raised from the water without the need for adjusting and/or securing the posts below the water level. In one embodiment, the corner assembly has a footing that is placed to rest on the bottom of a body of water. One leg extends upwardly from the footing. A small plate is welded to otherwise secured inside the leg. The plate has a threaded hole in the center for receiving and rotatively securing a worm drive. The worm drive is rotatably placed through a cap affixed atop a sleeve. The sleeve slides upon the leg, as the worm drive is rotated.