Measure the area where you’ll install the breakfast nook. You’ll need 1.5 feet of clearance in back of the nook. The table top should have a 1.5-foot overhang on three sides for people to sit. The fourth side, or second long side, will have the cabinet drawers. Order your desired cabinet under piece to the appropriate size.
Measure and mark where your cabinetry will go. You’ll want it 3 feet out from the nook wall.
Position the cabinet piece so that the doors or drawers are facing outward into the kitchen.
Set the cabinet brackets at the halfway point on each of the four cabinet top sides. Make sure the other bracket hole is on the outside, as it will support the tabletop. Mark the screw holes with a pencil and screw wood screws into the cabinets.
Set the tabletop into place. Make sure that it is set so that it has the proper overhang on the nook side, or back, and is even on the left and right sides. You should have a 1/2-inch overhang in the front.
Drill pilot holes from under the cabinet through the brackets into the the tabletop. Be careful not to drill all the way through; this is just a guide hole. Drill the 1-inch wood screws into the tabletop.