When you buy cabinets online, one of the first choices is how they show up at your door. Assembled cabinets arrive as finished boxes, with doors, drawers and hardware already in place. RTA (ready-to-assemble) cabinets arrive flat-packed: panels, fittings and instructions, built on site before installation.
Both can produce a great kitchen. The right answer depends on your timeline, your skills, your space for staging boxes and how much work you want to take on.
Assembled cabinets
Assembled boxes are glued, fastened and squared in a shop, with jigs and clamps that are hard to match in a garage. Drawers, slides and hinges are typically installed and adjusted before shipping.
Pros
- Ready to install. No building day, so the installer can start hanging boxes right away.
- Factory-controlled joints with glue and fasteners set under pressure, which usually means a squarer, stiffer box.
- Easier to add accessories like pull-out trash, roll-out trays and lazy susans that come pre-fitted.
- Fewer small parts to track and fewer chances of cosmetic damage during assembly.
Cons
- Bulkier shipping and more space needed to store boxes before install.
- Often longer lead times when built to order.
- Harder to carry through narrow stairs, hallways and elevators.
RTA cabinets
RTA cabinets use cam locks, dowels, clips or screws to join panels on site. Good RTA systems are well engineered, and many modern frameless kitchens are shipped this way.
Pros
- Compact shipping in flat boxes; easier to move into tight spaces.
- Often in stock, so they can ship sooner.
- Great for handy homeowners who enjoy the project and want to save on labor.
Cons
- Assembly time. Plan roughly an hour or more per cabinet for a first-timer, plus time to adjust doors and drawers.
- Strength depends on the builder. Skipping glue, overtightening cams or building out of square shows up later as sagging doors.
- Many boxes and parts to sort; a missing piece can stall the job.
- Risk of scratches and chips while assembling on the floor.
- Fewer size options in some lines.
| Assembled | RTA | |
|---|---|---|
| Arrives as | Finished boxes | Flat-packed panels |
| Work before install | None | Build every box |
| Shipping volume | Large | Compact |
| Box quality | Set by the factory | Set by whoever builds it |
| Fits tight access | Can be tricky | Easy |
| Best for | Most homeowners, pro installs | Confident DIYers, tight access |
Tip
If you go RTA, build it right
Work on a clean blanket, sort hardware into cups by cabinet, dry-fit before gluing, use glue on dowels when the instructions allow it, and measure both diagonals of each box. If they match, it is square.
Myth vs. fact
Myth: RTA always means low quality
The shipping format says nothing about the materials or hardware. A well-engineered flat-pack frameless cabinet can outperform a poorly built assembled one. Compare board grade, edge banding, hinges and slides, not just the box it came in.
Questions to ask before you buy
- Who will install, and do they charge extra to assemble?
- Can the boxes physically get into the room (stairs, doors, elevator)?
- Where will you stage 20 or more boxes during the project?
- How are replacement parts handled if something arrives damaged?
- Does the line offer the sizes and fillers your layout needs?
Not sure yet? Get your measurements right with our measuring guide and sketch your layout in the planner.