How to Install Kitchen Cabinets: A DIY Step-by-Step Guide

Installing kitchen cabinets and assembling them are two different jobs. Assembly is building the flat-pack boxes — clicking cam locks, seating dowels, sliding in the back panel. Installation is hanging those built boxes on the wall, plumb and level, joined into a run that holds countertops and decades of daily use. If your boxes are still flat, start with the assembly guide first, then come back here. If the boxes are built and stacked in the garage, this is where you start.

A clean kitchen cabinet installation comes down to three things: good layout lines on the wall before anything goes up, hanging the wall cabinets before the base cabinets so you have room to work, and leveling every run from the floor's high point outward. Get those three right and the doors line up, the countertop sits flat, and the whole kitchen looks like someone who knew what they were doing put it in.

Tools and materials you'll need

You do not need specialty equipment, but a few specific items make the difference between a frustrating install and a clean one. Gather everything before the first cabinet leaves the floor.

• Drill/driver with both drill bits and a #2 Phillips bit — you will be switching back and forth constantly.
• 4-foot level for spanning a run of cabinets and a torpedo level for quick checks inside a box.
• Stud finder — every cabinet must hit studs, not just drywall.
• Clamps, at least four. F-clamps or bar clamps pull face frames together before you screw them; this is the step most DIYers skip and later regret.
• Cabinet screws: 2.5-inch for cabinet-to-stud, 1.25-inch for cabinet-to-cabinet face frames.
• Shims — cedar shims from any hardware store. You will use more than you expect.
• A ledger board: a straight 8-foot or longer 1x4 or 2x4 temporarily screwed to the wall at the wall cabinet bottom line to support the uppers while you fasten them.
• Tape measure and pencil for marking.
• A helper. Two people can install a kitchen in a day; one person working alone can install the same kitchen in three days, badly.

Start with layout lines

Every good install starts on the floor before a single cabinet moves. Find the high point of the floor first. Walk the perimeter with a 4-foot level lying flat on the floor and a shim underneath one end. Where the shim is thinnest is the high point. Mark it with a pencil. This is your base cabinet reference — everything gets shimmed up to match it, not down.

From the high point, measure up 34.5 inches (standard base cabinet height) and snap or draw a level line all the way around the room. This is the top of your base cabinet run. From that same line, measure up 18 inches to mark where the bottom of the wall cabinets will sit — that 18-inch gap above the counter is the standard backsplash zone. Snap a second level line here.

Now find and mark every stud. Run the stud finder along the wall at roughly wall-cabinet height and again at base-cabinet height. Mark each stud centerline clearly — you will want to see these marks even when a cabinet is held in front of them. Double-check your marks by driving a finish nail into the wall at stud height; the nail will bite solid instead of punching through to air.

Hang the wall cabinets first

Wall cabinets go up before base cabinets. Always. If you set the bases first, you will spend the rest of the day leaning over them to hang the uppers, fighting for leverage and straining your back. With bare floor and bare walls in front of you, hanging the uppers is straightforward.

Cut a ledger board — a straight 1x4 or 2x4 works fine — and screw it temporarily to the wall with its top edge right on your wall-cabinet bottom line. The ledger does one job: it holds the cabinet at the correct height while you drive screws, so you are not asking a helper to hold a 50-pound box against the ceiling with their arms.

Start in a corner. If two walls meet where cabinets will run, set the corner cabinet first, then work outward in both directions. Rest the first cabinet on the ledger and check it with the 4-foot level — top front corner to top far corner. Adjust with shims between the cabinet back and the wall until the cabinet reads level and plumb. Drive 2.5-inch screws through the cabinet's hanging rail into two studs minimum. Do not skip the stud check. Drywall anchors are not a substitute for stud screws in a wall cabinet that will hold dishes.

Before setting the next cabinet, clamp the two face frames together with two F-clamps, pulling the faces flush and tight. Check alignment with a straight edge across both face frames, then drive 1.25-inch screws through the face frames to join them. Clamping before screwing is the detail that separates a professional-looking result from a row of cabinets with lips and gaps between the doors. Continue down the run, clamping and checking level as you go. The ledger board comes down when the run is complete.

Set and level the base cabinets

With the wall cabinets hung, you have room to move freely on the floor. Start the base cabinets at the high point you marked earlier, and work outward from there. Setting the first cabinet at the high point means everything else gets shimmed up to match it; if you start somewhere else, you will end up chasing an unlevel run with shims that get thicker and thicker as you go.

Set the first cabinet in position and check it for level front-to-back and side-to-side. Slide cedar shims under the base until the cabinet reads level in both directions, then check the height against your base line on the wall. When it is level and at the right height, drive screws through the back of the cabinet into the wall studs. Do not fasten anything permanently until it reads level — base cabinets are much harder to adjust once the screws are in.

Bring the next cabinet into position and clamp its face frame to the first one before driving any fasteners. Check that the faces are flush and that the top edges align. Drive 1.25-inch screws through the joined face frames, then fasten the second cabinet to the wall. Work down the run the same way: shim, level, clamp, face-frame screw, wall screw. Leave rough openings where appliances go — measure the dishwasher, range, and refrigerator widths before you start so you are not cutting that space out of a box you already fastened.

Doors, drawers, and final adjustments

Once the full run of wall cabinets and base cabinets is set, step back and look at the reveals — the even gap between each door and its neighbors. A reveal that is tight on the left and open on the right is a hinge adjustment, not a cabinet problem. Soft-close hinges have two or three adjustment screws: one moves the door in and out, one moves it up and down, and one moves it side to side. Work one hinge at a time in small turns and the gaps even out.

Drawer fronts are typically adjustable too, held by bolts through elongated holes. Loosen the bolts, tap the front into alignment until the reveal matches the doors beside it, and retighten. Do all drawer and door fine-tuning as a final step, not box by box as you go — the whole run being plumb and level is what makes a consistent reveal possible, and you cannot judge that until every cabinet is set.

Fillers, toe kicks, and finishing

Walls are never perfectly straight, which means the end of a cabinet run rarely sits flush against a wall without a small gap. Filler strips — thin pieces of matching cabinet material — close that gap cleanly. Measure the gap at its widest point, rip a filler strip to that width on a table saw, and scribe it to the wall if the wall is curved or bowed. A scribed filler presses flat against the wall with no visible daylight behind it.

Toe-kick covers hide the legs or shim stack below the base cabinets. They typically snap or nail into place. Cut them to length, miter the corners where two walls meet, and press them in. The reveal between the toe kick and the floor should be consistent all the way around the room. A small amount of caulk at the wall end of each filler and where the toe kick meets a wall gives the install a finished, professional look that is hard to get any other way.

When to call a pro

Most DIYers can handle a straightforward install if they have a helper, the right tools, and a full weekend. A few situations tip the balance toward hiring a professional, and being honest about them up front saves a lot of rework.

Severely out-of-plumb walls are the most common one. A wall that leans more than half an inch from top to bottom over a cabinet run requires scribing the cabinet backs to match, which takes real skill and the right tooling. Unlevel floors with more than an inch of variation across a run mean stacking shims high enough that the toe kick cannot cover them cleanly without custom framing. Stone countertops that will be cut and templated on-site need perfectly level base cabinets to sit without cracking — the tolerance for error is much tighter than with laminate. And if a kitchen remodel has a hard deadline, a two-person professional crew that runs these installs daily will finish in hours what might take a first-timer a long weekend.

TC ships all-wood cabinets, RTA or assembled, so some buyers will walk in having just assembled their boxes and are ready to hang. Others order assembled and go straight to the install. Either way, if you have your measurements and want a written wholesale quote before you order, the TC team handles that in-house. Call (813) 644-2034 or email design@tcwholesalecabinetry.com and they will put real numbers in writing.