Installing kitchen cabinets is one of those projects that transforms a space, and saves a few thousand dollars if tackled without a contractor. It’s not a beginner’s first swing at DIY, but with careful measuring, a helper for the heavy lifting, and patience during leveling, most homeowners can handle it over a weekend. The key is working methodically: upper cabinets go in first (they’re easier to maneuver without base cabinets in the way), then bases, then trim and hardware. This guide walks through the process from layout to final adjustments, covering the techniques pros use to get doors aligned and everything plumb.

Essential Tools and Materials You’ll Need

Before the first screw goes in, gather everything. Missing a tool mid-install means cabinets hanging half-level while someone runs to the hardware store.

Tools:

• 4-foot level (longer is better for spanning multiple cabinets)
• Stud finder (magnetic or electronic)
• Drill/driver with bits (including a #8 countersink bit for cabinet screws)
• Clamps (bar clamps or cabinet clamps to hold units together)
• Pencil and tape measure
• Circular saw or miter saw (for scribing filler strips)
• Shims (both wood and plastic composite)
• Safety glasses and dust mask

Materials:

• Kitchen cabinets (pre-assembled or RTA, ready-to-assemble)
• 3-inch cabinet screws (for anchoring to studs)
• 1¼-inch screws (for joining cabinet boxes)
• Ledger board (a straight 1×3 or 1×4, length of the wall)
• Wood filler strips (if needed for gaps)
• Shim stock

Most cabinets are frameless (European-style) or face-frame (traditional American). Face-frame cabinets are more forgiving during install since the frame hides small gaps. Frameless boxes require tighter tolerances but maximize interior space.

Preparing Your Kitchen for Cabinet Installation

Prep determines whether cabinets go in smoothly or become a frustrating battle with an uneven wall.

Remove old cabinets and appliances. Disconnect plumbing under the sink and cap lines. Turn off power to any outlets inside cabinet zones at the breaker.

Check walls for plumb and flat. Hold the level vertically in several spots. Older homes often have walls that bow or tilt. Mark any high spots, these will need shimming behind the cabinets. A wall that’s out of plumb by ½ inch over 8 feet isn’t uncommon and won’t ruin the install, but it needs accounting for.

Locate and mark studs. Kitchen walls typically have studs every 16 inches on center, but verify with a stud finder. Mark stud centers with painter’s tape at the height where the cabinet backs will sit. Cabinet screws must hit studs, drywall anchors won’t support the weight of a loaded cabinet.

Measure and mark the high point of the floor. This matters for base cabinets. Use a long level or laser level to find where the floor peaks. That spot becomes the reference height: all other base cabinets shim up to match it.

Install a temporary ledger board for wall cabinets. Measure up from the high point of the floor to the bottom edge of where the upper cabinets will sit (typically 54 inches for an 18-inch gap between counter and cabinet bottoms, assuming 36-inch base cabinets with a 1½-inch countertop). Screw a straight 1×3 or 1×4 into studs along this line. The ledger supports cabinets while leveling and fastening, otherwise, you’re holding 60 pounds overhead with one hand while drilling with the other.

How to Install Upper Wall Cabinets

Upper cabinets go first. With bases out of the way, there’s room to work and no risk of damaging countertops.

Locating Studs and Marking Your Layout

Double-check stud locations inside the cabinet zone. Transfer stud marks to the inside of the cabinet backs (or on the wall where they’ll be visible through the cabinet opening). This prevents guesswork when drilling mounting holes.

Dry-fit the cabinet layout on the floor. Arrange cabinets in order, accounting for corner units, filler strips, and spacing around windows or hoods. Measure the total run and compare it to the wall length. If there’s a gap, decide where filler strips go, usually at the ends or beside the stove/fridge.

Mark cabinet edges on the wall. Measure from a corner (or a fixed feature like a window) and use a level to draw plumb lines showing where each cabinet edge will land. This is the roadmap.

Many home improvement guides emphasize that getting the first cabinet perfectly level and plumb sets the standard for the rest of the row. Rush this step and every cabinet downstream fights you.

Hanging and Leveling the Cabinets

Start with a corner cabinet (if applicable) or the cabinet at one end of the run.

1. Lift the cabinet onto the ledger. With a helper, rest the bottom edge on the ledger board. The ledger does the heavy holding.
2. Check for level and plumb. Place the 4-foot level on top of the cabinet (side-to-side) and against the face (front-to-back). If the cabinet tilts, slip shims behind it at stud locations until it’s perfectly level and the face is plumb.
3. Drill pilot holes through the cabinet back into studs. Use a countersink bit so screw heads sit flush. Drive 3-inch screws through the mounting rail (the reinforced strip inside the cabinet back) into at least two studs. Don’t fully tighten yet, leave room for micro-adjustments.
4. Add the next cabinet. Lift it onto the ledger, butt it against the first cabinet, and clamp the face frames (or cabinet sides) together. Check level across both cabinets. Shim as needed.
5. Join cabinets together. Drill pilot holes through the side of one cabinet into the neighboring cabinet’s face frame or side panel. Use 1¼-inch screws to pull them tight. Align the fronts so door gaps are consistent.
6. Repeat down the wall, checking level and plumb with every addition. After all cabinets are joined and shimmed, go back and tighten all mounting screws into studs. Score and snap shims flush with a utility knife.

If a wall is badly out of plumb, the gap behind the cabinet can exceed 1 inch. In that case, scribe a filler strip to the wall profile and attach it to the cabinet side before hanging.

How to Install Base Cabinets

With uppers secured, remove the ledger board and move to base cabinets. The process mirrors wall cabinet installation, but bases must also align with the high point of the floor.

Start at the high point of the floor (marked during prep). Place the first base cabinet, often a corner unit, at this spot. Check it for level in both directions (side-to-side and front-to-back). If the floor dips anywhere, shim the cabinet legs or base until the top is perfectly level. Most factory cabinets have adjustable legs: turn them to raise or lower corners.

Join base cabinets the same way as uppers: clamp face frames or sides together, drill pilot holes, and fasten with 1¼-inch screws. Keep checking level across the tops, this is the plane the countertop will rest on, so any twist or tilt will telegraph through.

Anchor to the wall. Once cabinets are joined and level, drill through the upper mounting rail (inside the cabinet, near the back top edge) into studs. Use 3-inch screws. The weight of base cabinets is mostly on the floor, but wall anchoring prevents tipping, especially around sinks where plumbing adds stress.

Shim behind cabinets if the wall bows out. This keeps the cabinet face plumb and prevents gaps that would show beside the countertop or backsplash.

For beginners installing kitchen cabinets, base cabinets often feel easier because there’s no overhead wrestling. But floor irregularities can be tricky, don’t skip the shimming, even if it feels tedious.

Sink and appliance cutouts: If a cabinet houses the sink, mark and cut the countertop after the cabinet is installed and level. Dishwasher and range gaps usually require filler strips or end panels for a finished look. Allow 1/16 to ⅛ inch clearance for appliances to slide in without binding.

Final Adjustments and Hardware Installation

Cabinets are up and anchored, but the job isn’t done until doors align and hardware is on.

Adjust cabinet doors. Most hinges have three adjustment screws: one for depth (in/out), one for lateral movement (left/right), and one for height (up/down). Loosen the screws slightly, shift the door until gaps are even (typically ⅛ inch between doors and around the frame), then retighten. Soft-close hinges may need tension adjustment: consult the manufacturer’s template.

Install drawer pulls and knobs. Measure from the cabinet edge (not the drawer front edge, which can vary) to keep placement consistent. A drilling jig or template ensures handles land at the same height across all drawers. For drawers, center pulls horizontally. For doors, handles typically go on the side opposite the hinge, about 2½ to 3 inches from the top corner.

Add toe-kick molding. The recess at the base cabinet bottom (usually 4 inches tall, 3 inches deep) gets covered with a toe-kick board, often matching veneer or paint-grade MDF. Cut to length, nail or clip in place.

Install crown molding or light rail (if the design calls for it). Crown molding at the top of wall cabinets hides the gap to the ceiling and gives a finished look. Miter corners carefully: a miter saw is the right tool here. Light rail molding goes under wall cabinets to conceal under-cabinet lighting.

Caulk gaps. Run a bead of paintable caulk (or color-matched silicone) along the joint where the cabinet meets the wall and ceiling. This hides shim gaps and gives a clean edge. Smooth with a wet finger or caulk tool.

Touch up any screw holes, scratches, or dings with wood filler or touch-up markers. If painting, do final coats after hardware is installed to avoid masking tape residue on fresh paint.

Seasoned DIYers on home improvement forums often mention that the difference between a good cabinet install and a great one is in these final details, aligned reveals, tight caulk lines, and hardware that feels solid.