Lauren HollandBy Lauren Holland

Updated November 2026

The installation of kitchen cabinets comes down to three things: a accurate layout, level and plumb boxes, and secure anchoring into framing. Get those right and your doors will close evenly, your countertops will sit flat, and the cabinets will stay put for decades. This guide walks through the sequence a finish carpenter would follow on a typical remodel.

Prepare the Space and Plan the Layout

Before any cabinet leaves the box, confirm your measurements and mark the room. Check that walls and floors are reasonably flat, since a badly out-of-plumb wall will push errors into every run. Locate studs, which typically sit 16 inches on center, and mark them with a pencil line at the height of the cabinet tops.

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Snap a level reference line at the height of the wall cabinets. Standard base cabinets are usually 34.5 inches tall before a countertop, and standard upper cabinets are often hung with their bottoms about 18 inches above the counter. Check the specific dimensions in Standard Kitchen Cabinet Dimensions: A Designer's Guide to Sizes That Fit so your layout matches the manufacturer’s boxes.

Install the Base Cabinets First

Base cabinets set the foundation for everything above them. Start in a corner or at the wall that is most level, and work outward.

  1. Set the first base cabinet on shims at the reference height and check it with a four-foot level in both directions.
  2. Screw the cabinet to the wall through the back rail into studs. Use 2.5 to 3-inch screws, depending on your cabinet material.
  3. Join adjacent boxes with face-frame clamps or screws through the side rails, keeping the fronts flush.
  4. Shim beneath the box, not behind it, so the floor carries the load and the cabinet does not bow.
  5. Repeat along the run, checking level and plumb after each box.

Hang the Wall Cabinets with Accurate Alignment

Upper cabinets carry the most leverage against the wall, so anchoring matters more here than anywhere else. Use a ledger board screwed into studs to support the first cabinet while you fasten it. Keep the top edges on your reference line and check that the faces align with the base cabinets below.

Anchoring Tips

Drive screws through the cabinet back rail into the studs, not just into drywall. If a wall lacks framing where you need it, add a blocking board between studs before hanging. Check the manufacturer’s weight guidance for loaded uppers, especially for heavy cabinets with glass or stone-filled interiors.

Check Alignment, Fasten, and Finish the Run

Once every box is in place, inspect the whole run before you install hardware. Open each door and drawer to confirm reveals are consistent, typically around 1/8 inch between doors. Adjust hinges as needed. Fill any gaps at the top and sides with filler strips rather than forcing a box to fit.

Installation Checklist

  • Stud finder and pencil
  • Four-foot and two-foot levels
  • Shims (plastic or hardwood)
  • Cabinet screws sized for your rails
  • Drill with bit set and clamps
  • Ledger board for upper cabinets
  • Tape measure and laser or chalk line

Common Mistakes to Avoid

  • Skipping the level reference line, which causes uneven tops and misaligned doors.
  • Anchoring only into drywall, which can fail under load.
  • Shimming the back instead of the bottom, which can warp the box.
  • Tightening screws before checking alignment, making later adjustments difficult.
  • Ignoring floor slope, which may require leveling the base run before setting boxes.
  • A quality four-foot level helps you catch small errors across a long run. View on Amazon
  • Face-frame clamps hold adjacent base cabinets flush while you screw them together. View on Amazon
  • A stud finder with deep-scan mode helps locate framing before you drill into the wall. View on Amazon

FAQ

Can I install kitchen cabinets without a helper?

You can, but upper cabinets are much easier with a second person or a ledger board to support the weight while you fasten them.

Should I install cabinets before or after flooring?

Many installers set base cabinets before finish flooring so the flooring runs under the boxes, though this varies by project. Confirm the sequence with your contractor.

Do I need a professional for cabinet installation?

Simple replacements can be a manageable DIY project, but gas, electrical or structural changes should be handled by a licensed professional.

Conclusion

A successful installation of kitchen cabinets depends on careful layout, level base boxes, and secure anchoring into studs. Work methodically, check every box as you go, and fix small errors before they compound. A little patience at the start keeps doors aligned and countertops flat for years.

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Lauren Holland

About Lauren Holland

Lauren Holland is part of our editorial team and reviews and edits our kitchen design & remodeling guides, checking product details against manufacturer specifications and owner feedback.