Outdoor kitchens - a multi-trade project wearing a masonry disguise

What is outdoor kitchen installation?

An outdoor kitchen is a built structure - usually a masonry or steel-framed island clad in stone or stucco - that houses a grill and whatever else you choose to put in it. The construction is the visible part. The project is the utilities: a gas line, electrical circuits, sometimes water and a drain, all installed by licensed trades to code, plus clearances and ventilation requirements set by each appliance manufacturer. The frame gets built once. The utility rough-in has to be right before it does.

Signs you need outdoor kitchen installation

• You already cook outside constantly and are running back into the house for everything except the grill
• You are building or rebuilding a patio anyway, so the slab, the gas line and the conduit can go in while the ground is open
• A freestanding grill has taken over one corner of the patio and there is nowhere to put a plate down
• You entertain outdoors regularly and the host spends the whole time in the kitchen while everyone else is outside
• You want the grill vented and sited away from the house rather than pushed against a wall under a soffit
• You are adding a pool or a covered patio and want the cooking area designed into it rather than added afterwards

Seeing something not on this list? Browse hardscaping problems by symptom →

How outdoor kitchen installation actually works

1. 1

   Deciding the appliance list first - everything else follows it

   The appliances determine the utilities, the openings, the clearances and the counter run. A grill alone is a very different project from a grill plus a side burner, a refrigerator, an ice maker and a sink. Manufacturers publish cut-out dimensions and combustible-clearance requirements for each unit, and those are what the island is built around.

   Watch forA design drawn before the appliances are chosen. Retrofitting a different grill into a finished masonry opening is demolition, and the clearance requirements vary enough between models that "roughly that size" is not good enough.

2. 2

   Siting - wind, smoke, the house wall and the route from the door

   Smoke and heat have to go somewhere that is not a window, a soffit, a door or your seating. Prevailing wind, roof overhangs and where people sit all constrain the position, as does the walking route from the indoor kitchen, which you will use more than you expect.

   Watch forA grill placed under a covered structure or against a wall without checking the appliance manufacturer's requirements for overhead and side clearance. Combustible clearances are a fire-safety matter and they are set by the manufacturer and the code, not by the mason.

3. 3

   Foundation or slab under the island

   A masonry island is heavy and concentrated. It usually needs a properly built slab or footing rather than sitting on a paver field, and in freezing climates the foundation has to be detailed so frost movement does not crack the structure or the counters.

   Watch forAn island built directly on top of existing paving that was never designed to carry it. Settlement under a rigid masonry structure cracks it, and the counter shows it first.

4. 4

   Utility rough-in, by licensed trades, before the frame closes up

   Gas piping sized and run by a licensed gas fitter, electrical circuits and outdoor-rated receptacles by a licensed electrician, and - if there is a sink - a water supply and a drain that goes somewhere legal. All of it happens before the cladding goes on.

   Watch forAnyone offering to run gas as part of a landscaping package without the appropriate licence and permit. This is the item on the page that can kill someone. It is also the item most often quietly subcontracted - ask who exactly is doing it and see the licence.

5. 5

   Framing the island

   Either masonry block or a steel or metal-stud frame, built to the appliance cut-outs with the required ventilation openings in the enclosure. Enclosures for gas appliances need ventilation for a reason, and that reason is the accumulation of unburned gas.

   Watch forVentilation openings omitted or blocked by cladding for a cleaner look. This is a life-safety detail on a gas appliance enclosure and it is not a design preference.

6. 6

   Cladding and countertops

   The frame is faced in stone veneer, brick, tile or stucco, and the counter is templated and fitted. Outdoor counters have to handle UV, freeze-thaw and staining from food and grease, which rules out several materials that work indoors.

   Watch forAn indoor countertop material specified outdoors. Some stones and engineered products discolour, stain or fail in sunlight and frost. Ask the fabricator directly whether the specific product is warranted for exterior use.

7. 7

   Drainage, water management and appliance installation

   Counters are sloped or detailed to shed water, the enclosure is drained so water does not sit around appliances, and the appliances are installed and commissioned. Anything plumbed needs a plan for winter.

   Watch forA sink with no accessible shut-off and drain-down point in a climate that freezes. It is a small detail at build time and a burst line every spring if it is missed.

8. 8

   Handover, winterising and the maintenance conversation

   You should leave with appliance manuals, the electrical and gas permit sign-offs, and a clear account of what has to be covered, shut off, drained or brought indoors each winter.

   Watch forNo permit paperwork. Gas and electrical work on a habitable property is inspected for a reason, and the sign-off is what you will want if you ever make an insurance claim or sell the house.

What does outdoor kitchen installation cost?

Outdoor kitchen pricing is driven far more by the appliance list and the utility runs than by the island itself - how far gas, power and water have to travel, and what the counters are. A grill-only island and a full kitchen with sink and refrigeration are different projects, not different sizes.

See the full outdoor kitchen installation cost guide - by material, size and region →

If the number is the problem, here are the ways people pay for it →

Outdoor living budget and planning tools → Rough out the scope before you take quotes on a multi-trade project.