Kitchen Electrical and Plumbing Preparation — What to Get Right Before Installation

Behind every well-designed kitchen is a set of pipes, cables and ducts that nobody sees once the cabinets are installed. When these services are in the right place, the kitchen goes in smoothly and works safely for years. When they are wrong — a drain in the wrong spot, a socket hidden behind a tall unit, a dishwasher with no power, a gas pipe where a drawer should be — the installer has to improvise, the design suffers, and sometimes safety is compromised.

This guide explains how to prepare electricity, plumbing, gas and ventilation for a new kitchen. It is not a substitute for a licensed electrician, plumber or gas installer, and all work must comply with the Saudi Building Code and local regulations. What it does offer is the kitchen maker’s perspective: what the cabinets, appliances and worktops need from the services, and what to confirm before installation day. It draws on the experience of a Riyadh factory that has installed more than 5,000 kitchens since 2015 and has seen what happens when services are left to chance.

Why services come before cabinets

Cabinets are designed around fixed points. The sink must sit above the drain, the dishwasher beside the water supply, the cooktop below a hood that can be ducted outside, and every appliance within reach of its own power point. If the services are installed first according to a generic drawing, the kitchen has to adapt to them. If the kitchen is designed first, the services can be placed exactly where the cabinets need them. That is why the ideal sequence is: design the kitchen, produce a services layout from the approved design, install the services, finish walls and floors, and then install the kitchen.

In renovations, the existing services set the starting point, but the same principle applies. Before approving a design, confirm which services can be moved and at what cost, and design around what will actually be possible.

Electrical planning

Dedicated circuits for high-power appliances

Kitchens contain some of the most power-hungry appliances in the home. Electric and induction cooktops, built-in ovens, dishwashers and, in some homes, washing machines each draw significant current. A qualified electrician should size a dedicated circuit for each according to its rating, so that one appliance does not overload a shared line. The refrigerator is also commonly given its own circuit so it keeps running if another circuit trips.

Protection against electric shock

Water and electricity meet in the kitchen, so protection matters. Circuits serving sockets near the sink and in wet areas should be protected by residual current devices, often called RCD or GFCI protection, which cut the power quickly if current leaks to earth. Proper earthing of all appliances and metal parts is essential. Your electrician will design this according to the applicable regulations; the kitchen maker’s role is to make sure the design does not place sockets where water is likely to reach them.

Worktop sockets

Plan enough sockets along the worktop for the small appliances you use at the same time — kettle, coffee machine, toaster, mixer, blender. A common mistake is to plan too few, which leads to extension leads across the worktop. Sockets are usually placed a short distance above the worktop surface, commonly around 10 to 20 cm, so plugs and cables do not lie on the worktop. Avoid placing them directly above the sink or behind the cooktop. If the kitchen has a full-height stone or porcelain backsplash, socket positions must be fixed before the backsplash is cut.

Sockets and isolators for built-in appliances

Built-in appliances — ovens, microwaves, integrated refrigerators, dishwashers, hoods — need power points in positions specified by the appliance manufacturer, usually in the cabinet next to or above the appliance rather than directly behind it, where the plug could not be reached. Where required, an accessible isolator switch lets you disconnect an appliance for service without pulling it out. The kitchen design should show every one of these points.

Island power

An island needs power brought up through the floor. Plan sockets on the ends or sides of the island, protected from splashes, and a dedicated circuit if the island includes a cooktop. This must be done before the floor is laid.

Lighting circuits

Lighting should be planned in layers — ceiling, under-cabinet task lighting, pendants, accent lights — with separate switching. LED drivers for cabinet lighting need accessible locations, often above wall cabinets. Pendant points over an island must match its final position. Our kitchen lighting guide covers the details.

Coffee corner and special appliances

A coffee corner with an espresso machine, kettle and grinder needs several sockets and sometimes a water supply for a plumbed-in machine. Water dispensers, filtered-water taps, instant hot water taps and under-sink water heaters also need power and water points. Decide these early.

Plumbing planning

Water supply

The sink needs hot and cold supplies, and the dishwasher needs a cold supply. Each supply should have an accessible isolation valve, typically inside the sink cabinet, so water can be shut off for maintenance without cutting the whole house. If you plan a water filter, a filtered-water tap, a refrigerator with a water dispenser or an instant hot water tap, their supply points and space inside the cabinet must be planned too.

Drainage

The sink drain must have enough fall to reach the main drainage line. The longer the distance, the more important the route. The dishwasher drain usually connects to the sink waste, with the hose looped high or fitted with an arrangement recommended by the manufacturer to prevent dirty water flowing back. The drain position also affects the sink cabinet’s internal layout: a drain in the centre of the cabinet leaves less usable space than one near the back wall.

Sink position

Sinks are commonly placed under windows for light and view, but the drain and supplies must reach that position. Moving a sink more than a short distance often requires breaking floors or walls. If the sink will be on an island, the supplies and drain must be routed through the floor before it is finished.

Protecting cabinets from leaks

Even well-installed plumbing can leak eventually. Protecting the sink cabinet reduces damage: a protective tray or mat at the cabinet base, water-resistant carcasses such as aluminium or saj in the sink zone, and easy access to valves and connections so problems are spotted early.

Water heaters

Some homes use a small under-sink or wall-mounted water heater for the kitchen. It needs space, ventilation, access for maintenance, and an electrical supply. If it will be inside a cabinet, the cabinet must be designed around it with the manufacturer’s clearances.

Gas installations

Many Saudi households still prefer gas cooking for its responsiveness. Gas installations must be carried out and checked by qualified installers in line with safety regulations. From the kitchen design perspective:

• The gas supply point should be positioned where the cooktop’s connection can reach it without passing through drawers or cabinets that will be disturbed.
• An accessible shut-off valve must remain reachable after the kitchen is installed.
• Connectors and hoses must be of approved types and lengths, and not kinked or pinched by drawers.
• The cooktop manufacturer’s clearances to walls, cabinets and hoods must be respected.
• The kitchen must have adequate ventilation.

If you are switching from gas to induction, or planning both, discuss it before the services are fixed, because the requirements are different.

Ventilation duct

A hood that exhausts to the outside needs an opening in an external wall or roof, and a duct route from the hood position to that opening. The duct should be the diameter the hood requires, commonly around 150 mm, as short and straight as possible, and must never discharge into a closed ceiling void. The route must be prepared before the ceiling is closed. Our ventilation guide explains why this matters so much.

Air conditioning in the kitchen

Kitchens in Saudi Arabia need cooling, but the position of air-conditioning outlets affects cooking. An outlet blowing directly across the cooktop disturbs the hood’s capture and can blow out gas flames. Outlets should be placed away from the cooking zone, and the cooling load should account for heat from ovens and cooktops. Wall-mounted split units should not be placed above tall units or where their condensate drain would run inside cabinets.

Walls, floors and ceilings

Services are not the only preparation. Walls where wall cabinets will hang must be strong enough to carry them; lightweight partitions may need reinforcement or special fixings. Floors should be level, or at least their variation known, because base cabinets must be levelled. If the floor finish runs under the cabinets or stops at the plinth, decide in advance. Ceilings should be finished with lighting points in the right places, and any bulkhead above the cabinets built to the design.

Producing a services layout

Once the kitchen design is approved, the most useful document for your contractor is a services layout. It shows, on each wall elevation and the floor plan, the exact positions and heights of water supplies, drains, electrical sockets and switches, dedicated appliance points, gas points, lighting points and the hood duct opening. With this drawing, the contractor can install services exactly where the cabinets need them, and the kitchen installer arrives to a room that is ready.

A pre-installation checklist

• Water supplies and drains in their final positions, tested for leaks.
• Isolation valves accessible inside the sink cabinet position.
• Dedicated circuits for cooktop, oven, dishwasher and refrigerator.
• Worktop sockets at the planned height and positions.
• Power points for built-in appliances where the manufacturer specifies.
• Island services brought through the floor, if applicable.
• Gas point positioned and tested, with a shut-off valve that will remain accessible.
• Hood duct opening and route prepared.
• Lighting points in the ceiling matching the kitchen layout.
• Walls strong enough for wall cabinets.
• Walls and ceiling finished and painted; floor laid.
• Air-conditioning outlets away from the cooking zone.

Planning services for how the kitchen will really be used

Regulations set the minimum for safety, but a comfortable kitchen usually needs more than the minimum. The best way to plan services is to walk through a typical day in your kitchen and note every appliance and every task. In the morning, perhaps the kettle, coffee machine and toaster run at the same time while someone prepares lunch boxes. At midday, the cooktop and oven may both be working while the dishwasher runs. In the evening, the family gathers, a blender or mixer is used, phones are charged at the island, and the coffee corner prepares Arabic coffee for guests. Each of these moments tells you where sockets are needed, which appliances run together, and which circuits carry the heaviest loads.

This exercise often reveals needs that generic drawings miss: a socket inside a cabinet for a plugged-in appliance garage, a charging point in the island for homework, a dedicated point for a second refrigerator or freezer in the back kitchen, a water supply for a coffee machine, or a spare socket for a future appliance. Adding these at the design stage costs very little. Adding them after the backsplash is installed and the cabinets are fixed can mean cutting finished surfaces.

The back kitchen and utility areas

Many villas include a back kitchen or service kitchen for heavy cooking, and sometimes a laundry area nearby. These spaces have their own service needs, often heavier than the main kitchen. A back kitchen may have a large gas cooktop or several burners, a second oven, a deep sink for large pots, a second refrigerator or chest freezer, and a strong exhaust fan in addition to the hood. Its floor may be washed frequently, so a floor drain can be useful where the construction allows it, and sockets should be placed well above splash height. Planning these services at the same time as the main kitchen ensures both spaces work together, and it avoids overloading circuits that were designed for a lighter kitchen.

Working with your contractor and specialists

A kitchen project usually involves several trades: the general contractor, the electrician, the plumber, sometimes a gas installer, the air-conditioning technician, and the kitchen maker. Problems arise when each works from a different drawing or at the wrong time. The simplest way to avoid this is to share one services layout, derived from the approved kitchen design, with everyone involved, and to agree on a sequence: first services, then wall and floor finishes, then ceiling and lighting points, then kitchen installation, then worktops and appliances. A short site meeting before walls are closed, with the kitchen maker present to check positions, catches most mistakes while they are still easy to fix.

After installation, keep the services layout with your home documents. It tells any future technician where pipes, cables and valves run behind the cabinets, which makes maintenance quicker and safer and prevents accidental drilling into hidden services.

Safety habits once the kitchen is in use

Good installation is the foundation, and a few habits keep the kitchen safe over the years. Know where the water shut-off valves and the gas valve are, and make sure every adult in the house knows too. Test RCD protection periodically using its test button, as your electrician advises. Do not overload worktop sockets with multi-way adapters for high-power appliances. Keep the area under the sink dry and check for drips every few months. Clean the hood filters regularly, because grease build-up is a fire risk. And if you ever smell gas, turn off the supply, avoid using electrical switches, open windows, and call a qualified technician immediately.

Services and kitchen materials

The choice of kitchen materials and the quality of the services are closely linked. A small, slow leak under the sink can go unnoticed for weeks, and over that time water will attack any carcass that is not designed to resist it. That is one reason we often recommend water-resistant structures in the sink and dishwasher zone, even when the rest of the kitchen uses other materials. Similarly, heat from an oven installed without the manufacturer’s ventilation gaps can affect neighbouring cabinets, and steam from a dishwasher opened immediately after its cycle can reach the underside of the worktop. When the services are planned correctly and the materials are chosen to match the exposure of each zone, the kitchen remains stable and attractive for many years. When either is neglected, even the best fronts cannot compensate.

In short, invest a little time in the services plan before any wall is closed. It is the least glamorous part of a kitchen project, but it is the part that decides whether everything else can be installed exactly as designed.

Common mistakes

1. Installing services before the kitchen design is approved.
2. Too few worktop sockets, leading to extension leads.
3. Sockets behind appliances where plugs cannot be reached.
4. No dedicated circuit for the cooktop or oven.
5. Drains without enough fall, causing slow drainage.
6. No isolation valves under the sink.
7. Gas shut-off valves hidden behind fixed panels.
8. Hood ducts discharging into the ceiling void.
9. Air-conditioning outlets blowing over the cooktop.
10. Island positions decided after the floor is laid.

How we coordinate services at Modern Palace

During the free measuring visit we record existing services and discuss what can be moved. Once the design is approved, we provide a services layout showing every point the kitchen needs, and we coordinate timing with your contractor. On installation day our teams check that services match the design before fitting cabinets, so problems are solved before the kitchen goes in rather than after. The kitchen itself is manufactured in our Riyadh factory and covered by a written 10-year warranty. For the overall process, see our guide to planning a new kitchen step by step.

Invisible services decide how visible parts perform. Planned from the approved design and installed by qualified professionals, they make the kitchen safe, efficient and easy to maintain for many years.

Frequently asked questions

Which kitchen appliances need their own electrical circuit?

High-power appliances such as electric or induction cooktops, built-in ovens, and often dishwashers and washing machines should each have a dedicated circuit sized by a qualified electrician according to the appliance rating. The refrigerator is also commonly given its own circuit so it is not affected by other faults.

Do kitchen sockets need special protection?

Sockets near the sink and in wet areas should be protected by residual current devices (RCD/GFCI) that cut the power quickly if current leaks to earth. Your electrician will design protection according to the Saudi Building Code and local regulations.

How high should sockets be above the worktop?

Worktop sockets are usually placed a short distance above the worktop surface — commonly around 10 to 20 cm — so plugs and cables do not rest on the worktop and splashes are less likely to reach them. Keep them away from directly above the sink and the cooktop.

Where should the water shut-off valves be?

Each supply to the sink, dishwasher and any filter or instant water heater should have an accessible isolation valve, usually inside the sink cabinet, so you can shut off water for maintenance or in an emergency without cutting the whole house.

Can I use gas cooking in a modern kitchen?

Yes, but gas installations must be carried out and checked by qualified installers, with an accessible shut-off valve, approved connectors and adequate ventilation. The cooktop manufacturer’s clearances to cabinets and hoods must be respected.

When should services be prepared relative to kitchen installation?

Services should be in their final positions before walls and floors are finished and before the kitchen is installed. We provide a services layout from the approved design so your contractor can place water, drainage, electrical and gas points exactly where the cabinets need them.