An appliance height-adjustment mechanism includes a support block having a plurality of supporting faces, a plurality of height-adjustment surfaces defined by at least a portion of the supporting faces of the support block, each height-adjustment surface being further defined by a lateral spacing flange extending perpendicularly from each height-adjustment surface and a plurality of support surfaces defined by at least a portion of the plurality of supporting faces, wherein each support surface corresponds to a cooperating height-adjustment surface of the plurality of height-adjustment surfaces, wherein the support block includes a plurality of support positions, and wherein each of the plurality of support positions is defined by one of the support surfaces being a respective base of the support block and the corresponding height-adjustment surface defining a dedicated appliance height above the respective base.