Outdoor Kitchen Grill Cutout Dimensions: How to Get the Hole Right the First Time

There is no industry-standard grill cutout. A “36-inch grill” is a marketing name, not a dimension. Two 36-inch grills from different manufacturers can have cutout widths that differ by more than an inch, and cutout depths that differ by three.

So the single most useful thing on this page is this instruction: download the specification sheet (usually a PDF, usually titled “installation instructions” or “cutout dimensions”) for the exact model number you are buying, and cut to that. Not the model family. The model number, including the suffix that denotes the fuel type, because natural-gas and propane variants of the same grill occasionally differ in depth.

Better still: buy the grill before you build the frame. Having the appliance physically on site while the mason works is the cheapest insurance available on an outdoor kitchen. It costs you storage space for a few weeks and eliminates the most expensive category of mistake on the whole project.

The ranges below are for sizing your masonry opening and planning your island length. They are not cut lines.

Compiled from published built-in grill installation documentation across mainstream and premium brands. Every figure is a range because every brand differs.

That last row answers a question that comes up more than you would expect: a counter holding two 36-inch grills needs roughly 70 to 76 inches of cutout plus a divider between them. Most manufacturers require a minimum spacing between adjacent cutouts so the flanges and any insulated jackets do not touch — commonly 3 to 6 inches. Add landing zones at each end and you are looking at an island of at least 110 inches to carry two 36-inch heads sensibly.

Width is the one everyone measures and the one that causes the fewest problems, because it is obvious.

Depth is the one that bites. The cutout depth is measured from the inside face of the front of the counter to the back of the opening, and it is almost always less than the counter depth — which means there is a strip of solid material behind the grill that has to be right. Cut too shallow and the grill body will not drop in. Cut too deep and the rear flange has nothing to land on. Depth is also where natural-gas and propane variants sometimes differ, because the manifold and regulator arrangement is not identical.

Height — the vertical clearance below the counter into which the grill body drops — is the one people forget entirely. A grill needs 9 to 13 inches of clear depth below the countertop surface, and that space must be genuinely clear. A cross-brace in your steel frame, a course of block, or a drawer box directly beneath the grill will stop the installation dead. Plan the frame around the appliance, not the other way round.

One more: the flange or lip. The grill hangs on a rim that overlaps the countertop. That overlap is typically 1 to 2 inches on each side, which means the visible finished opening is smaller than the cutout. If you are placing the grill close to a finished end, remember the flange needs somewhere to sit.

Cutting the hole a quarter-inch small is annoying. Getting the clearances wrong is a fire risk, and it is the part of this job worth being conservative about.

Combustible construction. Built-in grills are certified for installation in non-combustible enclosures — masonry, concrete block, steel stud with cement board. If your island is framed in wood, most manufacturers require an insulated jacket (a manufacturer-supplied stainless liner) and will specify clearances to combustibles that the jacket is designed to satisfy. Do not improvise this. The jacket is model-specific and using the wrong one, or none, voids both the warranty and the listing that your inspector is relying on.

Side and rear clearances. Manufacturers publish minimum distances from the grill body to adjacent combustible surfaces and to any side wall. Rear clearance to a wall is commonly in the 6 to 12 inch range, but it varies enough between brands that guessing is unwise. There is a second, separate rear-clearance question — whether the open lid clears the wall behind it — and that one is geometric rather than thermal. An open lid on a 36-inch grill can swing back and up substantially; check it against any wall, pergola post, or overhead beam.

Ventilation of the enclosure. If the island houses an LP cylinder, the enclosure must be ventilated so that heavier-than-air propane cannot accumulate. Requirements for LP-gas appliance installation are set out in NFPA 58, the Liquefied Petroleum Gas Code, and your local jurisdiction may amend them. Most manufacturers specify vent panel sizes and placement; fit them, and fit them low, because that is where propane collects.

Overhead. If the grill sits under a roof, pergola, or gazebo, there is a minimum vertical clearance to the underside and often a requirement for a vent hood. This is the clearance most often ignored on covered builds and the one most likely to cause a serious problem.

Once the cutout is fixed, three other dimensions follow from it automatically.

• Island depth. A cutout 21 to 24 inches deep needs a base at least 25 to 30 inches deep to leave supporting material front and back. This is why 24-inch-deep outdoor islands do not work with standard built-in grills.
• Island length. Cutout width plus 15 inches of landing zone on each side plus finished ends. A 36-inch grill therefore sets a 72-inch minimum island. See how wide an outdoor kitchen should be for the full arithmetic.
• Frame layout. No structural member may cross the cutout envelope, and nothing may occupy the 9 to 13 inches of vertical space below it. Storage drawers go beside the grill, not under it.

A note on the small stuff: kits and accessory components — rotisserie brackets, side burners, dedicated grill-shed kits sized for a specific griddle or pellet grill — usually publish their own cutout dimensions and these are frequently not interchangeable between the grill brand and the accessory brand. If you are building a run that combines, say, a pellet smoker and a flat-top griddle, get both specification sheets before the frame is welded. Our guide to an outdoor kitchen with a Traeger and a Blackstone covers that specific combination.

Run through this before anyone touches a saw.

1. Specification sheet in hand for the exact model number and fuel type.
2. Grill physically on site, or delivery confirmed before the frame is closed.
3. Cutout width, depth, and height transferred to the frame drawing.
4. No frame member crossing the cutout envelope or the space below it.
5. Insulated jacket ordered if any part of the enclosure is combustible.
6. Side, rear, and overhead clearances checked against the manufacturer's figures.
7. Open-lid arc checked against the wall, pergola, or roof behind and above.
8. Enclosure ventilation planned if an LP cylinder lives inside the island.
9. Gas line size and route confirmed with whoever is making the connection.
10. Countertop fabricator given the cutout dimensions and the flange overlap.

Nine of those ten cost nothing. The tenth is a phone call. Together they eliminate essentially every expensive grill-fitment failure we see people describe after the fact.

For the rest of the numbers on your build, see the outdoor kitchen dimensions guide, island dimensions, or start from the outdoor kitchen setup homepage.