Cabinet Assembly Guide: Step-By-Step RTA Assembly

Plan on 15 to 25 minutes per cabinet for your first few boxes, dropping to about 10 minutes each once you have the rhythm. A single kitchen's worth of cabinets — 12 to 18 boxes — typically takes one person a Saturday afternoon.

This guide covers the standard frameless base and wall cabinet. Specialty units — blind corners, lazy Susans, appliance garages — follow the same cam-lock and dowel logic with a few extra parts, all documented on the diagram sheet inside each box.

Tools you need

A #2 Phillips screwdriver (a drill with a Phillips bit is faster), a rubber mallet, a tape measure, and a square or a framing square. That's it. No specialty tools, no clamps, no glue.

Step 1: Unbox and lay out parts

Unbox on a clean, soft surface. The flattened original carton works well and protects the finish. Lay out all parts and count them against the packing list: two sides, top rail, bottom rail (or full deck on base cabinets), back panel, shelves, doors, drawer fronts, drawer boxes, and a hardware bag.

Identify the hardware bag contents against the diagram. Cam locks are the round metal disks; cam bolts are the screws that thread into them; wood dowels stabilize joints without carrying load; cabinet screws pass through the back cleats into the wall.

Step 2: Dry-fit before you cam-lock

Lay one side panel flat with the interior surface facing up. Insert the wood dowels into their pre-drilled holes along the top, bottom, and back edges. Insert the cam bolts into their pre-drilled holes on the same edges.

Slide the back panel into the groove along the back edge of the side. On base cabinets, drop the bottom deck onto the exposed cam bolts. Do not lock anything yet — this is a dry fit to make sure every dowel and cam bolt is in the correct hole.

Step 3: Close the box

Stand the assembly upright and lower the second side panel onto the exposed dowels and cam bolts. Press firmly, then rotate each cam lock a quarter-turn clockwise with a Phillips screwdriver. You'll feel it seat.

Tap gently around the perimeter with a rubber mallet to seat all joints flush. Do not use a metal hammer directly on the finish.

Step 4: Top and square

Install the top stretchers (on base cabinets) or the full top panel (on wall cabinets). Lock the remaining cam locks. Check for square by measuring both diagonals corner-to-corner — they should agree within 1/8 inch. If they don't, loosen the cam locks a half-turn, rack the box gently until the diagonals match, then re-lock.

Step 5: Doors, drawers, and adjustment

Install drawer glides on the interior of the cabinet at the marked heights, then install hinges on the doors. Hang the doors last. Use the 6-way adjustment on each hinge to dial in perfect reveals — vertical, horizontal, and depth are all independently adjustable.

Perfect reveals are what make a finished kitchen look factory-built. Take the extra five minutes per door to dial them in; it's the difference between a good install and a great one.

Common issues and fixes

If a cam lock doesn't seat, the cam bolt is likely one hole off — pull the panel, move the bolt, and retry. If the back panel bows outward, the top or bottom rail is not fully seated in the groove. If the box racks out of square, it's almost always because one cam lock was tightened before the opposite corner was engaged.