How to Install Kitchen Cabinets

Kitchen cabinets serve as the structural backbone of your culinary space, demanding precision to ensure doors swing flush and countertops sit level. A cabinet installation done well is virtually invisible—the boxes align perfectly, the reveal lines between doors are uniform, and the entire assembly feels as solid as the wall itself. Begin by treating the wall layout as your master reference point. Whether you are working with semi-custom boxes or flat-pack units, the secret lies in the foundation: if the first cabinet is off by even an eighth of an inch, the error will compound significantly by the time you reach the end of the run. Take your time with the measurements, respect the level, and prioritize rigid mounting to studs over speed.

  1. Find the high point first. Measure the high point of the floor and mark your wall for the base and upper cabinet heights. Use a long level or laser level to draw perfectly horizontal lines across the entire run of cabinets.
  2. Install temporary support. Screw a temporary 2x4 board into the wall studs exactly along your bottom line for the upper cabinets. This holds the heavy boxes in place so you can focus on driving screws rather than fighting gravity.
  3. Start at the corner. Start with the corner unit and move outward, lifting cabinets onto the ledger and clamping them together before securing them to the studs. Drill pilot holes through the back rail of the cabinets into the wall studs.
  4. Shim and level each box. Set the corner base unit first, using wood shims underneath to bring it to exact height and level. Screw the cabinet through the back mounting strip directly into the wall studs.
  5. Clamp faces perfectly flush. Use face-frame clamps to pull the cabinet stiles together so they are perfectly flush. Once clamped, drill through the frame and install cabinet connector screws to create a seamless look.
  6. Seal and hide the gaps. Measure and cut your toe kick material to cover the shim gaps at the floor. Use a finish nailer to attach the kickplate and install any crown molding or filler strips to hide gaps against walls or ceilings.