An assembly for undermounting a sink to a support surface includes a central sink support supporting a front center portion of a sink. The central sink support includes an elongated block member having an upper surface, a lower surface and extending sidewalls. The central sink support also includes first and second screw holes shaped and dimensioned for the passage of screws that will be secured to a front wall of a sink cabinet and a threaded locking pin hole with a similarly threaded locking screw. The assembly also includes a mounting driver having a support bar shaped and dimensioned for positioning between an underside of the sink and a wall of a cabinet at an angular orientation relative to the wall. The support bar includes a first end and a second end.