I made the cabinet carcass from maple veneer plywood. I made the bottom pieces first to make sure they fit in the kitchen. The bottoms that are under the sections with drawers are frames to give me access to the base under the cabinets. I attached the pieces of the cabinets with glue, finish nails, and screws. The bottoms and sides are 3/4 inch plywood and the backs are 1/2 plywood.