Outdoor Kitchen Planning Guide: Layout, Clearances, Gas and Budget

Divide the kitchen into four zones and arrange them in the order food moves: from the cold zone to prep, to the grill, to serving. Kitchen designers call these the hot, cold, wet and dry zones.

• Hot zone: the grill head, side burner, griddle and any warming drawer. It needs the most clearance and should sit downwind of seating when the prevailing wind allows.
• Cold zone: an outdoor-rated refrigerator, ice maker or beverage center. Keep it at the end of the island where guests can reach it without walking through the cook's space.
• Wet zone: a sink for rinsing hands, produce and tools. It depends on a water supply and drain, so its location is often dictated by plumbing.
• Dry zone: open counter for prep and serving, plus cabinets and drawers for tools and paper goods.

The common shapes are a straight run (one wall of zones, the cheapest), an L-shape (grill on one leg, prep and fridge on the other, good for corners of a patio) and a U-shape or island with a bar counter (the most workspace and seating). Start straight or L-shaped unless you entertain often; every corner adds cost.

Counter space is the part people underbuild most. The figures below are common kitchen-design planning guidelines applied outdoors, not code requirements. Check your appliance installation manuals, which govern cutouts and clearances.

The grill's installation manual sets the minimum distance from combustible walls, eaves, overhead structures and railings, and those numbers vary widely between models, so there is no single safe distance to quote. Many local fire codes also restrict open-flame cooking on or under combustible balconies of multifamily buildings. Plan for more space than the minimum: smoke and heat stain siding and soffits even when they are code-legal.

Build under a roof only if the grill manufacturer approves overhead installation and gives an overhead clearance, and plan a vent hood rated for outdoor grills where the roof is enclosed on several sides. Keep the island off low tree limbs, and keep propane tanks and gas meters a safe distance from ignition sources as local code and the gas utility require. When in doubt, ask your local fire marshal or building department before you pour a slab.

Yes, whenever the grill is set into an island made of or containing combustible materials, unless the manufacturer specifically rates the head for combustible installation. An insulated jacket is a double-walled stainless sleeve that sits between the grill head and the island cutout, creating an air gap that keeps heat from reaching wood framing, composite or foam. Most built-in grill manuals list it as required for combustible islands and optional for fully non-combustible masonry islands.

That means a wood-framed island with stone veneer still counts as combustible. So does a steel-stud island if it uses combustible sheathing. Buy the jacket that matches your exact grill model, since cutout dimensions differ: Blaze publishes a 30 5/8 by 21 1/4 inch cutout for the Prelude LBM 32, and Napoleon lists a 2 inch cutout tolerance on its Built-In 700 Series 32 in. that makes fitting easier. See Blaze vs Napoleon built-in grill for the head comparison.

In most jurisdictions, yes. Gas piping, new electrical circuits and plumbing for a sink typically require permits and inspections, and gas lines should be installed only by a licensed plumber or gas fitter. This is not a DIY step. A natural gas line needs correct pipe sizing for the total BTU of every appliance on it, an accessible shutoff valve at the island and a pressure test before anything is connected.

• Propane: if a 20 lb tank lives inside the island, the cabinet needs the ventilation openings the grill manual specifies, because leaked propane is heavier than air and pools. Never store a spare tank inside the island.
• Natural gas: order natural gas versions of the grill and side burner, such as the Napoleon Built-In 500 32 in. NG, rather than converting later.
• Electrical: outdoor receptacles need GFCI protection and weather-resistant in-use covers under the National Electrical Code. Refrigerators, lighting and rotisserie motors should be on circuits sized by a licensed electrician.
• Water: sink supply lines in cold climates need a shutoff and drain-down plan for winter.

The propane vs natural gas page covers fuel costs and trade-offs.

A modular island is a set of pre-built cabinets and grill carts, usually stainless or powder-coated aluminum, that bolt together on an existing patio. A masonry island is framed on site from concrete block or steel studs with cement board, then finished with stucco, stone or tile and a stone or concrete countertop.

Only one rated for outdoor use. Indoor compact fridges are designed for room temperature, and in summer heat their compressors run constantly, struggle to hold temperature and fail early; many also void their warranty when installed outside. Outdoor-rated units use sealed, weather-resistant construction and compressors sized for hot ambient air.

The Whynter BOR-53024-SSW 24 in. Built-in Outdoor Beverage Fridge is a 24 inch, 5.3 cu ft stainless outdoor fridge with a 32 to 64 F range and a cylinder lock, sized for a standard under-counter opening. For narrow bays, the Whynter BOR-327FS 3.2 cu. ft. Indoor/Outdoor Beverage Refrigerator is 14.6 inches wide with a 3.2 cu ft capacity and a 35 to 50 F range. Check whether a model is rated for built-in (front-venting) installation before you frame it into a closed island, and give it the ventilation its manual requires. Shade the fridge side of the island if you can; direct afternoon sun makes any compressor work harder.

Stainless and aluminum survive rain, but grill heads, burners and igniters last longer covered. Buy fitted covers for the grill head and side burners, and cover modular cabinets in the off-season; the Domi modular kitchen ships with a protective cover. Near salt air, choose 304 stainless and rinse surfaces periodically, because lower grades pit.

A roof extends the cooking season but brings clearance rules. A grill gazebo with a vented two-tier hardtop, such as the Sunjoy 7 x 9 ft. 2-Tier Hardtop Grill Gazebo, is designed to let smoke escape over a grill or griddle station; the Sunjoy 8 x 5 ft. Double-Tier Grill Gazebo is a budget fabric-roof version for a freestanding grill. Follow both the gazebo and grill manuals for clearances to the roof and posts. In freezing climates, drain the sink lines, empty and unplug fridges if the manual calls for it, and disconnect propane tanks and store them upright outdoors, never in a garage or shed attached to the house.

The range is enormous, so plan by tier. The equipment figures below are approximate totals of current catalog prices for the named components and exclude labor, masonry, countertops, gas lines, electrical and permits, which often cost as much as or more than the equipment. For labor and materials estimates in your area, use HouseProjectCalc.