Height adjustable angled desks are disclosed herein. An example height adjustment system includes a drive system including: a worm gearbox; a motor operatively coupled to the worm gearbox to drive the worm gearbox; and an output shaft operatively coupled to the worm gearbox, the output shaft extending in a first horizontal direction; and an interconnection gearbox coupled to the drive system, the interconnection gearbox to convert rotation of the output shaft to rotation of an interconnection shaft in a second horizontal direction different than the first horizontal direction, the interconnection gearbox including a first cover coupled to a second cover of the worm gearbox, the output shaft extending through the interconnection gearbox.