36" Floating Vanity Cabinet

Drill 3/4" pocket holes on the bottom and attach to the sides, pocket holes hidden on the bottom. Attach the 1x3 top trim, pocket holes hidden on top, with the nicest edge facing forward.

Attach the back support panels, which carry the cabinet's hanging load, with extra pocket holes and glue.

Place the vanity top and sink on the cabinet before installing the vertical dividers, and mark any cutout needed. Cut into the tops of the dividers with a jigsaw if the sink requires it.

Measure and cut the back support boards to fit, attach in place with 3/4" pocket holes and 1-1/4" pocket hole screws and glue. Install the vertical dividers, using the 8" shelf piece as a spacing guide.

Attach the shelves with glue and brad nails to keep the interior free of visible pocket holes or screws.

Hang the cabinet to studs in the wall using the 4" lag screws, spaced as far apart vertically as possible for maximum support.

Edge-band the exposed plywood edges, sand, fill, and finish with cabinet grade paint, then install the door with the euro hinges.