Abstract: A powered height adjustable desktop having a base with a fixed peripheral wall defining a cavity and a cover defining a horizontal work surface. A lift mechanism supports the cover relative to the base. The lift mechanism includes a linkage with at least one pair of lift arms pivotably connecting each side of the base to a respective side of the cover and a powered actuator attached to the base and operatively connected to the linkage. The actuator selectively activates the linkage to rotate the lift arms from a relatively horizontal position to at least one substantially fixed upright position, thereby raising the work surface from a sitting height to a standing height. At the sitting height, the cover rests upon the peripheral wall to fully enclose the cavity. At the standing height, the cover is spaced above and offset forward of the base.