Modular Office — Narrow Open Shelf Base

Fasten the two shelves to the sides, then the top to the sides, with pocket screws (or screws and glue). Keep it square — this module has to line up with the others under a shared top.

Glue-and-nail the 1/4" back on with 1-1/4" nails. It squares the box and keeps it rigid.

Fasten the top and bottom inside front trim, nailing through the sides and shelves into the edges of the trim with 2" nails. This frames the opening.

Line the side trim up with the front edge of the shelves and top and fasten with 1-1/4" nails and glue — fasten the top side trim into both the top and the sides, which reinforces the corner joints. Then measure, cut, and attach the front trim with brads and glue.

If you built in plywood, iron edge banding onto the exposed front edges and trim it flush. Sand everything smooth and finish to match the rest of your office modules.