Outdoor Kitchen: How to Plan a Modular BBQ Setup for a Terrace or Rooftop

An outdoor kitchen used to mean a masonry build with tiled counters and a fixed gas line — a project for a house with a garden. Modular units changed that. A run of stainless cabinets on castors, with a grill, sink and under-counter fridge, gives you most of what a built-in kitchen does, without construction work and without losing your deposit.

That makes it a realistic option for a Hong Kong terrace, podium garden or rooftop. But it only works if you plan it in the right order. Here is that order.

Why modular suits Hong Kong specifically

Four practical reasons.

It arrives in sections. A single 3-metre counter will not fit in a residential lift. Modular units come as separate cabinets that can be carried up and joined on site.

It moves. Most units sit on castors, so you can reposition for wind, sun or a party layout — and roll everything against a wall when the terrace needs to be a terrace again.

It suits renting. No plumbing to break out, no tiling to make good. When you move, the kitchen moves with you.

It grows. Start with a grill cabinet and a sink module, add a fridge cabinet or a corner unit later. That last point matters more than people expect, because almost everyone underestimates counter space on their first setup.

Browse configurations: modular outdoor kitchens

Step one: measure the run, then measure the route

Two sets of measurements, and the second one is the one people forget.

The run. Measure the usable wall or edge you want the kitchen along, then subtract circulation space. You need roughly 900mm–1m of clear standing room in front of the counter to work comfortably — less than that and two people cannot pass behind each other while one is at the grill. On a narrow terrace, an L-shape into a corner often fits better than a long straight run, because it uses the dead corner and keeps the walkway clear.

The route. Lift internal dimensions, lift door width, stairwell turns, corridor width, your own doorway, and any lip or step at the threshold. Also check the balcony or roof door swing — a door that opens outward onto the terrace eats into your run.

Then check the surface. Modular units are heavy once loaded, and a fridge cabinet is heavier still. You want a level, solid floor. Tiles over a slight fall to a drain are fine; soft decking or gravel is not, unless you put down pavers first. On a rooftop, if you are adding a large multi-cabinet run, it is worth asking your building management or a surveyor about floor loading rather than assuming.

Step two: decide about water before you decide about anything else

A sink and tap is the upgrade that changes how much you actually use an outdoor kitchen. It is also the part with the most variation in how it gets installed.

Two ways to feed it. Either connect to an existing outdoor tap or bibcock with a hose, or feed it manually from a container. If there is already a tap on the terrace — many buildings have one for plant watering — the job is straightforward. If there is not, running a new supply line is a plumbing job and needs the landlord's or management's agreement.

Drainage is the harder half. Waste water has to go somewhere legitimate: an existing floor drain or a proper waste connection. Never plan to let it run across a terrace or off a roof edge. If there is no drain within reach, use a catch container under the sink and empty it — unglamorous, but it works, and it keeps you out of trouble with the building.

Then think about what you will use it for. Rinsing hands and tools, mostly. Do not plan on it as a washing-up sink unless you have hot water, which almost no outdoor setup does.

Step three: power, if you want the fridge

An under-counter fridge is the difference between an outdoor kitchen and a grill with cabinets. Drinks and marinating meat stay outside instead of you walking in and out all evening.

It needs a proper outdoor-rated socket, ideally on an RCD-protected circuit, positioned so the cable does not cross the walkway. If you do not have one, that is an electrician's job, not an extension-lead job — a domestic indoor extension lead run out through a door is a genuine hazard in a wet outdoor space. Choose the fridge cabinet position with the socket in mind, and remember that fridges need airflow around the compressor, so do not box it in tight.

Step four: gas, cylinders and ventilation

Most modular outdoor kitchens run on an LPG cylinder housed in one of the cabinets. Three things to get right:

• Ventilation. The cylinder cabinet needs its vents kept clear. Do not use that cabinet for storage that blocks them.

• Cylinder supply and storage. LPG in Hong Kong is supplied and regulated through licensed channels, and some buildings have their own rules on storing cylinders. Talk to your supplier and your management office about where a spare can live.

• Checks. Inspect the hose and regulator at the start of each season, and do a soapy-water leak check on the connection every time you change a cylinder.

Also worth knowing before you buy: burner count is about layout, not just power. A 6+1 burner run lets you keep one zone cool for indirect cooking while searing on another, which is what you need for thicker cuts. A 3-burner unit is plenty for a compact terrace and two to four people.

Step five: shade, wind and the typhoon plan

Hong Kong's outdoor cooking season is really the cooler, drier stretch from autumn through spring — but sun and wind matter year-round.

Shade. A large cantilever or centre-pole umbrella over the working area makes an enormous difference in the middle of the day, and keeps stainless counters from becoming untouchable in direct sun. Position it so the pole does not sit in your walkway, and take it down in wind.

Wind. Exposed rooftops rob a gas burner of heat, particularly on the outer burners. If your site is windy, a wall, a screen or planters on the windward side improve cooking performance noticeably. Keep anything combustible well clear of the grill.

Typhoons. This is the non-negotiable one. Have a plan you can execute in twenty minutes: umbrella down and stored, covers on and secured, loose items indoors, cabinets rolled to a sheltered wall and, if possible, tied off. Anything that can lift or roll on a rooftop needs to be dealt with before the signal goes up, not during.

Step six: keep it alive

Stainless steel is not maintenance-free in this climate, especially near the coast.

• Cover the grill section when not in use, and let it cool fully first.

• Rinse the exterior with fresh water occasionally if you are close to the sea, and dry it down.

• Wipe salt and marinade residue off the counters rather than leaving it to sit.

• Empty and dry the fat tray after every cook, or you will find out what Hong Kong humidity does to it.

Which configuration for which space

• Compact terrace, two to four people: a 3-burner unit with tap and sink, fridge optional.

• Family terrace, regular hosting: a 5 or 6+1 burner run with sink, side burner and fridge.

• Awkward corner or narrow L-shaped terrace: an L-shape configuration with a corner unit — it turns the least usable part of the space into counter space.

• Rooftop with real room: the full L-shape run, with shade and a proper storage plan.

If you are still choosing the grill itself rather than the whole kitchen, start there instead — a single trolley grill on a terrace is a perfectly good first step, and most modular ranges can be built around one later.