Narrow-Depth Secretary Cabinet with Mail Slots

Build the divider area first since it's difficult to add dividers after the box is assembled. Nail the divider boards to their shelf. If using pocket holes, drill first on the ends of the shelves.

Attach all shelves, including the divider subassembly, to the sides. Use a shelf pin jig for the top shelf and any shelves behind cupboard doors so they stay adjustable.

Check the whole cabinet for square, then attach the back with 1-1/4" finish nails and glue to all fixed shelves.

Build the face frame separately on a flat surface, then attach the completed face frame to the front of the cabinet.

Build the doors with 1x3 frames and 1/4" plywood panels, cutting each door to fit its opening with about 1/8" clearance on all sides for the hinges.

Install the upper and lower cabinet doors with inset hinges, and the secretary desk door with euro-style inset hinges. Sand all surfaces and apply primer and paint, or stain and poly.