For most kitchens, a stock or semi-custom cabinet line is the right answer. Stock boxes are built around three fixed numbers, and in a room with square walls and an eight-foot ceiling those numbers work fine. A custom kitchen earns its cost somewhere else, when the room refuses one of them. A work surface that has to sit below 36 inches. A walkway that can’t spare 24 inches of depth on both sides. A wall running out of square by more than a scribe strip can cover.
That’s a measuring decision, and it lands before the pricing one.
| Change needed | Stock | Semi-custom | Custom |
|---|---|---|---|
| Width | Fixed steps of three inches, with fillers for the leftovers. | Same steps, plus some widths cut to order. | Any width the wall needs. |
| Base depth | Fixed at 24 inches. | Shallower depths on request. | Drawn to the walkway you have. |
| Base height | Fixed at 34.5 inches. | Height reductions on many lines. | Set to whatever the work surface needs. |
| Walls out of square | Scribe molding hides small gaps. | Scribe molding and finished ends. | End panels scribed to the wall itself. |
| Odd geometry | Not available. | Limited. | Handled in the drawing. |
| Lead time | Shortest of the three. | Longer than stock. | Longest of the three. |
| Best fit | Square rooms with standard clearances. | One dimension off standard. | Rooms that break more than one number. |
Three Fixed Numbers Sit Behind Every Stock Cabinet
A stock line is a catalog of boxes, not a drawing. Base cabinets are 24 inches deep and 34.5 inches tall. Wall cabinets are 12 inches deep. Widths climb in three-inch steps, so you order a 30 or a 33 and never a 31. Set a countertop on top of that base and the finished work surface lands at 36 inches, which is where almost every American kitchen sits.
Width is the forgiving number. When a run comes up two inches short, a filler strip absorbs it and nobody notices. Software makes this look easier than it is, because a free planner will happily draw a box in any size you type and then hand you a layout no manufacturer builds.
Depth and height are the two that don’t bend. There is no filler for a walkway.
Depth Is the Number a Narrow Kitchen Runs Out Of
Put standard base cabinets on both sides of a galley and you’ve spent 48 inches of floor before anyone stands in the room. Doors and pulls take a little more. Whatever’s left is the aisle two people share while one of them is holding a hot pan.
Federal accessible-design standards give you a useful floor to test against: in a pass-through kitchen, clearance between opposing base cabinets has to be 40 inches minimum. A private home isn’t required to meet that. It’s still the number worth measuring to, because it reflects what a body needs to work in.
So do the arithmetic on your own room. A ten-foot-wide galley gives you 120 inches, minus 48 for the two runs, leaving 72. Comfortable. A seven-foot galley gives you 84 inches, minus 48, leaving 36. That’s below the standard, and it’s the point where a shallower base on one side, 21 inches instead of 24, buys back the floor you need. Ordering that shallower box is a modification, not a catalog choice. The same arithmetic decides whether the floor has room for an island at all.
Height Stops Working When Someone Needs to Sit Down
The 34.5-inch base box plus a countertop is what produces the standard 36-inch counter. That height assumes a person standing. Change the assumption and the whole box has to change with it.
Federal standards cap an accessible work surface at 34 inches maximum above the finish floor. You can’t trim your way there. A thinner countertop saves you half an inch and leaves you two inches short, and the cabinet underneath still has a drawer box and a toe kick where knees need to go. A seated work surface means an open bay, a lowered deck, and a counter that steps down for part of its run.
Aging in place changes the elevation, not just the fixtures
Grab bars and lever handles get added late. A lowered work surface can’t be. McDaniels carries the Certified Aging-in-Place Specialist credential, so when a household expects a seated cook or a wheelchair user, the drop in the counter is drawn into the cabinet elevation at the start. Retrofitting it later means replacing boxes you already paid for.
The Middle Grade Buys Modifications, Not a Blank Sheet
Semi-custom is the same catalog box with changes applied at the factory. Cut the depth. Cut the height. Add a finished interior, a matching end panel, a width between the standard steps. For a kitchen that’s off standard in one place, that’s usually enough, and it costs a fraction of starting from a blank sheet.
What a modification can’t do is invent geometry. An angled wall where two runs meet at something other than 90 degrees. A chimney chase that bumps eight inches into the room. A radiator under the only window. Those need a shop drawing, and a drawing is what custom means. Door style and finish are the easy part, and they read differently in person than on a screen, which is why pulling a drawer open in a showroom settles arguments that photos keep alive.
Match the Grade to What Your Room Breaks
Find the description that sounds like your kitchen.
- Square room, eight-foot ceiling, standard appliances. Stock. Your money is better spent on box construction and hardware than on geometry you don’t need.
- One number off standard. A galley that needs 21-inch bases on one wall, or a single run that has to drop to a seated height. Semi-custom handles this, and the modification is priced per cabinet rather than per kitchen.
- Two or more numbers off, or geometry a catalog can’t describe. Custom. Once you’re modifying half the run, you’re paying custom prices for a stock box’s limitations.
- An older house with walls out of square down a long run. Scribe molding covers a quarter inch, not an inch and a half. Custom scribed ends, at minimum, on the runs that show.
You don’t have to pick one grade for the whole room, either. Running a stock line down the perimeter and building only the one wall that breaks a number is common, and it’s often the cheapest honest answer. The catch is matching. A custom shop can match a catalog door closely enough that a guest never sees it, but the closer the finish is to a stain rather than a paint, the harder that gets. Painted doors from two sources forgive each other. Stained doors from two sources show their difference in raking afternoon light.
If one of those already sounds like your kitchen, the next step is a set of field dimensions and a designer looking at them. You can start your kitchen design consultation and bring whatever measurements you have, even rough ones.
Cost still matters, and it deserves its own answer rather than a guess folded into this one. Custom kitchen cabinets price out well above a stock line, and the gap moves with door style, box construction, and finish more than most people expect.
What Custom Costs You Besides Money
Here’s the part that gets undersold. A custom box has no shelf to come off. If a dimension is wrong, or a finish arrives blotchy, you don’t exchange it. It gets built again, and cabinetry already sits on the critical path of the whole schedule. A stock line’s real advantage isn’t the price. It’s that another one of those doors exists.
Which is why the measuring matters more at this grade than any other. We design from field dimensions taken in the room, not from numbers typed into a plan, because a custom kitchen is drawn to a wall that has to be right the first time. An eighth of an inch of drift across a twelve-foot run is invisible on paper and obvious when the crown won’t close.
Frequently Asked Questions About Cabinet Grades
How deep is a standard base cabinet?
A standard base cabinet box is 24 inches deep. The countertop usually overhangs the door face by an inch or so, which puts the finished counter edge closer to 25 inches from the wall. Wall cabinets are 12 inches deep by default, though deeper ones show up over a refrigerator.
Can a stock cabinet be cut down to fit?
Sometimes, and it’s rarely the bargain it looks like. Cutting a finished box in the field exposes raw edges, moves the door and drawer hardware out of alignment, and voids most manufacturer warranties. A factory modification costs more up front and arrives finished on every face that shows.
What counts as semi-custom cabinetry?
Semi-custom means a catalog box that the factory will alter before it ships. Typical changes include reduced depth, reduced height, a width between the standard three-inch steps, finished interiors, and matching end panels. The construction and door styles still come from a fixed menu.
Which Grade Does Your Kitchen Need?
Measure the room before you shop the grade. Wall to wall across the walkway, floor to ceiling on the cabinet walls, and the height anyone in the house needs to work at comfortably. Those three numbers tell you whether a catalog box fits or whether the room has already ruled it out.
Bring them in and we’ll tell you which grade your kitchen honestly needs, including when that answer is stock. Book a kitchen and bath design consultation and we’ll work from your dimensions, not a template.