Lauren HollandBy Lauren Holland

Updated November 2026

Learning how to install kitchen cabinets comes down to three things: find a reference line, set the boxes level and plumb, and fasten them into wall studs. Done in that order, a set of cabinets will sit flush, close smoothly, and carry the weight of countertops without shifting. This guide walks through the sequence a designer would follow on a typical remodel.

Prepare the Space and Mark Your Layout

Start by clearing the room and confirming that your cabinet plan matches the walls. Walls are rarely perfectly square, so measure each run at the floor, at counter height, and at the top of the upper cabinets. Use the shortest measurement for your reference.

Shopping for one? See our guide: 5 Best Kitchen Cabinet Door Hinges for Soft Close and Easy Install (2026).

Next, locate the studs with a stud finder and mark them with painter’s tape. Snap a level line at the height of the top of the upper cabinets, then mark the base cabinet height. Standard base cabinets are 34.5 inches tall before countertops, so a 36-inch finished counter leaves room for a 1.5-inch top. Check the layout against your plan using Standard Kitchen Cabinet Dimensions: A Designer's Guide to Sizes That Fit if you are still finalizing widths.

Install the Base Cabinets First

Base cabinets set the foundation for everything else. Begin at the corner or the longest wall run, and work outward.

  1. Set the first base cabinet on the floor and shim under the front edge until the top is level with your reference line.
  2. Drive a screw through the cabinet’s back rail into a stud to anchor it. Use 2.5-inch screws at least.
  3. Join adjacent cabinets with face-frame clamps, then drill pilot holes and fasten them together.
  4. Check each cabinet with a level, both front to back and side to side, before moving on.

Leave a consistent gap at the wall ends for filler strips, which make up for out-of-plumb walls. If you are installing a sink base, dry-fit the plumbing openings now so you do not have to cut the box later.

Hang the Wall Cabinets Accurately

Upper cabinets demand more care because they are heavier to lift and any error shows at eye level. Measure from your reference line up to the bottom of the cabinet, then mark the rail locations on the wall. Use a ledger board screwed into studs to hold the cabinet while you fasten it.

Once the cabinet is supported, drive 3-inch screws through the mounting rail into each stud. Check level and plumb again, then join the cabinet to its neighbors. Install the uppers around any corner or appliance openings last, since these need the most adjustment.

Finish the Fit with Filler and Trim

Filler strips close the gaps between cabinets and walls, and they are a quick way to hide minor wall irregularities. Scribe the filler to the wall profile where needed, then fasten it to the cabinet frame. Add crown molding or light rail after the filler is set, so the trim sits flat against the top of the uppers.

Before installing countertops, confirm that all doors and drawers open and close without rubbing. If you plan to add interior accessories, read Pull Out Shelves for Kitchen Cabinets: 7 Steps to Choose and Install before you finalize the drawer boxes, since some systems need specific clearances.

Tools You Will Need

  • 4-foot and 2-foot levels
  • Stud finder and tape measure
  • Drill/driver with pilot bit set
  • Shims and a ledger board
  • Face-frame clamps
  • Painter’s tape and a pencil

Common Mistakes

  • Skipping the reference line, which causes the whole run to drift out of level.
  • Fastening into drywall instead of studs, which leads to sagging uppers.
  • Installing uppers before checking the base run, so the counter height does not line up.
  • Forgetting to account for appliance clearances and trim depth.
  • Overtightening screws, which can crack face frames.
  • A long torpedo level helps you confirm the cabinet runs are level across multiple boxes. View on Amazon
  • A stud finder with a live-scan display makes it easier to find stud edges before drilling. View on Amazon
  • Face-frame clamps hold adjacent cabinets flush while you drive the joining screws. View on Amazon

FAQ

Should I install upper or base cabinets first?

Install base cabinets first, because they set the countertop height and give you a stable base to measure uppers from. Uppers are then aligned to the same reference line.

Do I need to attach cabinets to studs?

Yes, anchoring into studs is the most reliable method, especially for uppers that carry weight over time. Drywall anchors alone are not enough for cabinets.

How do I handle an out-of-level floor?

Shim the base cabinets to level rather than trying to level the floor itself. Consult a licensed contractor if the floor has major structural issues.

Conclusion

Knowing how to install kitchen cabinets is mostly a matter of disciplined measuring and working from a single reference line. Set the bases carefully, hang the uppers with support, and finish with filler and trim. Take your time, and the result will be cabinets that look and work the way they should.

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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.