How to Assemble RTA Kitchen Cabinets: A Step-by-Step Guide

Ready-to-assemble cabinets show up flat — a tidy stack of panels with the hardware bagged inside. Putting one together is not difficult, but it is real work: plan on roughly 10 to 20 minutes per cabinet once you find your rhythm, which for an average 10x10 kitchen adds up to an afternoon. The good news is that the system is the same box to box, so once you have built one, the rest go quickly.

This guide walks through that system end to end — the tools to have ready, how the dowels and cam locks actually join, and how to keep every box square so it hangs cleanly later. And if it turns out you would rather not spend the afternoon building boxes, we cover the shortcut at the end, because we stock these same cabinets assembled too.

What you're actually putting together

An RTA cabinet is the same cabinet as its assembled version — you are just doing the last step yourself. Our boxes are all-wood: plywood cases with solid-wood doors and face frames, soft-close hinges and slides throughout, and dovetailed drawer boxes on the vanities. None of that changes because it ships flat.

The parts connect two ways, and you will see both on nearly every box. Dowels are the wooden pegs that line up the panels and add glue surface. Cam locks — a round cam that a bolt seats into — are the mechanical clamp that pulls the joint tight when you turn them. The back panel usually slides into a groove routed along the sides and bottom, which is what actually squares the cabinet. Knowing those three pieces — dowel, cam, grooved back — is most of the battle.

Tools to have ready

You do not need a shop. Most of this is basic homeowner kit:

• A rubber mallet, to seat panels and dowels without marring the wood.
• A drill or driver set to a low torque setting, so you do not strip or overdrive the screws.
• A Phillips screwdriver for the final snug turns.
• A level, and ideally a tape measure for diagonal checks.
• Wood glue.
• A clean, flat work surface — a carpeted floor or a moving blanket over plywood keeps finished faces from scratching.

Step 1 — Inventory the parts first

Open the box and check every part against the packing list before you build anything. Lay out the panels, count the dowels, cam bolts, shelf pins, hinges, and any drawer hardware. Two minutes here saves you from discovering a missing cam bolt when the glue is already wet. If something is short or damaged, set that box aside and keep moving on the others.

Step 2 — Build the box

Lay the two side panels flat with the pre-drilled holes facing up and the back edges toward each other. Put a small dab of wood glue in each dowel hole — but not in the larger through-holes the cam bolts pass through. Seat the dowels from the bottom panel into one side panel and tap them home with the mallet until the joint pulls flush.

Bring the second side panel onto the other ends of the dowels and cam bolts. Once everything is aligned, turn the cams clockwise to lock them. Snug is the target, not cranked — overtightening a cam strips its seat and loosens the joint instead of tightening it. The box should now stand as a frame.

Step 3 — Set the back panel and square it

Slide the back panel down into the grooves on the sides and bottom. This is the piece that takes a wobbly frame and makes it rigid, so do not skip it or force it in crooked. With the back in, check that the box is square: set a level across it and eyeball the corners, or measure both diagonals — when the two diagonal measurements match, the box is square. Adjust before anything sets, because a box that dries out of square will fight you on the wall.

Step 4 — Hang the doors, drawers, and shelves

With the case built, add the moving parts. Clip the soft-close hinges onto their plates and hang the doors; the hinges have small adjustment screws, so you can even out the gaps once the cabinet is installed — do not obsess over perfection now. Fit drawer boxes onto their slides and check that they glide and self-close. Drop in the shelf pins at the height you want and set the shelves. Save final door and drawer fine-tuning for after the cabinets are mounted and leveled as a run.

Step 5 — Confirm square before it goes up

Before a cabinet joins the lineup on the wall, give it one last squareness check and make sure every cam is snug. Cabinets are hung as a level, connected run, and one box that is out of square throws off the doors and reveals of its neighbors. Catching it on the floor takes a second; catching it after it is screwed to a stud does not.

Assembling a whole kitchen? Work in batches

If you are building an entire kitchen — or you are a contractor running these on a job — treat it like a small production line instead of building boxes one at a time:

• Sort the flat packs by type and build all the same-size boxes in a row; the muscle memory makes each one faster.
• Set up one clear, flat station and keep it clear. Most assembly mistakes come from working on a cluttered or uneven surface.
• Get every box built and squared before you start hanging anything, so the install phase runs uninterrupted.
• Leave doors and drawer fronts slightly adjustable until the full run is set and leveled, then dial in the reveals all at once.

Prefer to skip the build? Order them assembled

Here is the honest part: assembly is the one step you can hand off. We stock this same cabinet line assembled as well as RTA, so if you do not have the afternoon — or the job's labor is better spent elsewhere — you can order the boxes already built and go straight to hanging them. For local buyers, our Tampa warehouse stock is often ready within days, with pickup, local delivery, or freight. If you are still deciding which format fits, our breakdown of RTA versus assembled cabinets walks through the freight-versus-labor math.

Either way, our in-house team can take your measurements or a cabinet list and turn it into a written wholesale quote, and we send free full-size door samples so you can see the finish before you commit. Send over your list and we will lay out both options — assembled or ready to assemble — and you pick whichever actually fits the job.