How to Install Wall Cabinets in a Garage

Wall cabinets turn a garage from a sprawling junk heap into a place where you can actually find your tools. They're also cheaper than building shelving from scratch and a lot faster to install than you'd think—the real work is getting them level and anchored into something solid enough to hold the weight. Once you've got the studs marked and a ledger board installed, hanging the cabinets themselves takes maybe an afternoon. Done right, they'll hold hundreds of pounds of stored goods without budging.

  1. Find Every Stud First. Use a stud finder to locate every stud in the wall where you're installing cabinets. Mark each stud with a vertical pencil line at eye level, then mark again at the height where the top of your cabinets will sit. Drive a finish nail at the top mark to confirm the stud location—hit solid wood, not drywall. Take a photo of the marked studs; you'll need those locations when you hang.
  2. Build a Level Ledger. Decide where the bottom of your cabinets should sit—usually 54 to 60 inches from the floor for garage cabinets. Snap a chalk line at that height all the way across the wall. Cut a 2x4 ledger board to span your cabinet width and screw it into every stud you'll be covering with cabinets using 3-inch wood screws. Use a 4-foot level to make sure it's dead level before you drive all the screws home. The ledger board carries half the cabinet weight during installation.
  3. Prep Cabinets Before Hanging. If your cabinets ship flat-pack, assemble the first one according to instructions—usually just screwing the sides to the top and bottom. Don't attach doors or shelves yet. Find the top rails inside the cabinet (the horizontal 2x4 equivalent that the mounting system uses) and locate the pre-drilled mounting holes. These holes should line up with studs. Measure from the left edge of the cabinet to each mounting hole and write those measurements down; you'll use them to drill pilot holes in the studs.
  4. Hang the First Cabinet. Transfer your mounting hole measurements to the studs you marked earlier. Drill 3/16-inch pilot holes at those locations, positioned about 1.5 inches below the chalk line (so the mounting hardware sits on the ledger). Have a helper support the first cabinet on the ledger board. Drive 5/16-inch lag bolts with washers through the cabinet mounting holes into the pilot holes, snugging them tight with a socket wrench but not over-tightening. Use a 2-foot level across the top of the cabinet to verify it's level before moving to the next one.
  5. Connect All Cabinets. Position the next cabinet next to the first, again using the ledger board for support. Hang it the same way with lag bolts into studs. Once both are secure, bolt them together using the cabinet manufacturer's connector bolts—usually 5/16-inch bolts that run through pre-drilled holes in the vertical sides where the cabinets meet. Tighten these connectors snugly. Repeat this process for each additional cabinet, always working left to right and verifying level as you go.
  6. Shim for Perfect Fit. Once all cabinets are hung, check the gap between the wall and the back of the cabinets. If you see light between them, slide tapered shims into any gaps and tap them in until the cabinet back sits flat against the wall. Once you're happy with the fit, drive additional 3-inch wood screws through the ledger board into the studs between the cabinet mounting bolts. These extra fasteners take the weight off the lag bolts during the life of the installation.
  7. Hang Doors Last. Attach shelves and adjustable shelf pins according to the cabinet manual. Then hang the cabinet doors, adjusting them so they close smoothly and sit flush with the cabinet frame—most cabinets have screws behind the hinges that let you fine-tune alignment. Install handles or knobs last. Step back and check that all doors are parallel, centered, and opening without binding.
  8. Seal and Paint. Once the cabinets are hanging, seal the gap between the ledger board and wall with paintable caulk. This keeps dust and rodents out of the gap. Sand any rough spots on the ledger board and paint it to match the cabinet color or your garage wall. Paint the shims too if they're visible. A quick pass with a brush or spray takes 30 minutes and makes the whole job look finished.