How to Build a Vanity Mirror

Lay the 1x3 sides, 1x6 footer, and 1x8 header down and arrange for square. Join them — pocket screws into the header and footer are cleanest. Lay the long 1x2 border on top around the outside and screw and glue with 1-1/4" fasteners. Check diagonals and adjust for square before the glue grabs.

If you want a shelf, cut the two supports into angled brackets, fasten them under the shelf board, and attach the assembly to the frame. Skip this step for a plain mirror.

Sand the frame smooth and paint or stain it to match the bathroom before the mirror goes in, so you don't get finish on the glass.

Set the mirror into the back of the frame and secure it with mirror clips (a bead of mirror-safe adhesive is optional insurance). Attach a heavy-duty picture-hanging kit, then hang into a stud or a properly rated drywall anchor and level it. Never trust a single light hook with a mirror over a sink.