Bought your own cabinets? Here's how professional installation works

Plenty of folks around Knoxville buy their own kitchen. You order from a big-box store or an online RTA line, the boxes show up on a pallet in the garage, and now they have to end up on the wall — level, plumb, tight to each other, and scribed to walls that are never as straight as the boxes assume. That last part is the job. Setting cabinets you supplied isn't fundamentally different from setting anyone else's; it just means the ordering was on you, so the first thing a good crew does is check your homework before we touch a screw. Here's how the install actually goes, start to finish.

First we verify the order and the parts

Before anything gets hung, we lay the delivery out and check it against your layout and the packing list. This is where homeowner-supplied jobs live or die, because a missing part you didn't know to order stalls the whole run — and the reorder lead time is on your dial, not ours. The usual no-shows are the pieces that aren't boxes: fillers, finished end panels, toe-kick, and light rail. RTA especially tends to ship the cabinets and forget the trim accessories.

• Every box, filler, panel, and toe-kick accounted for — count them against the layout, not just the invoice.
• Doors and drawer fronts undamaged and correctly handed — a wrong-swing corner unit or a cracked front is a long reorder.
• Hinges, slides, and specialty inserts — lazy Susans and pull-outs in the same delivery.
• Flat-pack boxes assembled square — if it's RTA, the boxes get built and checked for square before they ever go on the wall; a racked box fights you the whole install.

If you're still deciding what to buy, our breakdown of RTA vs. semi-custom vs. custom cabinets covers the trade-offs that show up right here on the garage floor — how the grade you pick changes the parts count, the tolerances, and how much of the day is assembly versus setting.

Layout starts at the floor's high point

No kitchen floor is level. If you set the cabinets to the floor, the whole run follows the dips and the countertop ends up chasing a wave. So we shoot the room with a laser, find the highest point along the run, and set every base to that. Everything low of that high spot gets shimmed up to meet the line — which is why you'll see shims under the bases. From that benchmark we snap a level line for the tops of the base cabinets and a second line for the bottoms of the uppers, both off the laser, never off the floor or the countertop-to-be.

We also find and mark the studs across the whole run at that point. Cabinets carry real load — a full upper of dishes, a base with a stone top — so they fasten into framing or solid blocking, through the cabinet's hanging rail, not into drywall and a plastic anchor. Where a stud doesn't land behind a screw, that's a spot we plan for.

Uppers to the level line, then scribe to the walls

We usually hang the uppers first so we're not reaching over set bases. They come up to the level line, screwed through the hanging rail into the studs, ganged together and their faces pulled flush and dead level to each other before anything's driven home. A finished end panel or a filler against a wall gets scribed — the wall isn't straight, so we mark the exact contour of the wall onto the panel, cut to that line, and the piece lands tight with no caulk-filled gap. Same story at the ceiling: if there's a crown or a light rail, it rides the cabinets, but the wall behind it is out of square, so those get scribed and fit, not forced.

Bases shimmed level and plumb, run set tight

The bases go in to that same high-point line. Each box gets shimmed level side-to-side and front-to-back, and plumb on the face, then screwed to the studs. Before we lock anything down, the whole run gets clamped and drawn together so the face frames are flush and the reveals between doors are even — you set the run as one unit, not as a string of separate boxes. Fillers at walls and at the end of a run get scribed the same way the uppers did. When it's right, every base is solid, nothing rocks, and the top of the run is one continuous level plane.

That flat, solid plane is what "counter-ready" means. If a fabricator is templating for stone, they template off cabinets that are set, secured, and not moving — not off a box that still needs a shim.

The finish pass: doors, drawers, toe-kick, and light rail

Boxes on the wall is most of the work but not the part you see every morning. What you see is the doors and drawers, and those get dialed in one at a time. Modern cabinet hinges adjust six ways — up/down, in/out, and side-to-side — so we tune every door until the gaps are even and the fronts sit in one plane across the run. Drawer slides get adjusted the same way so every drawer front lines up with the doors around it. Then the toe-kick goes on to cover the shims and close the base to the floor, and any light rail or crown gets set to finish the top edge.

• Six-way hinge adjustment so door gaps are even and faces are coplanar.
• Drawer slides tuned so fronts align with the doors and each other.
• Toe-kick applied to hide the shims and close the base to the floor.
• Light rail and crown fit — scribed to the wall, not caulked over a gap.

As for cost: installing homeowner-supplied cabinets is quoted per job, because the number rides on things I can't guess from here — how many boxes, whether it's assembled or flat-pack RTA, how out-of-square the walls are, and how much scribing and filler work the run demands. Assembled boxes on true walls set fast; flat-pack that has to be built and scribed to a wavy 1920s wall in Old North Knoxville takes longer, and the quote reflects that. If you want to understand what moves the number, our finish carpentry cost guide walks through the drivers.

Bought your own cabinets and need them set right? We install homeowner-supplied and RTA kitchens across Knoxville and East Tennessee — verified, laid out from the high point, scribed, and left counter-ready. See how we work with homeowners on our homeowners page, or read more about cabinet installation, and send us your cabinet order and layout for a quote.