Single vs Double Sockets: Which Should You Choose?

by Klaudia Pyc

Aug 19, 2026

Home & Garden, Buying Guides

Single vs Double Sockets: Which Should You Choose?

A single socket provides one outlet and is usually best suited to a dedicated appliance, while a double socket gives you two outlets in the same location and offers more flexibility for everyday use.

For most rooms in a modern UK home, double sockets are usually the more practical option. They make it easier to connect several devices without relying on extension leads or plug-in adaptors. Single sockets still have an important purpose, particularly behind fixed appliances or in places where only one connection is needed.

In this guide, we explain the difference between single and double sockets, where each type is normally used and what you should consider before choosing the right option for your home.

What Is a Single Socket?

A single socket is a wall socket with one outlet for a standard UK three-pin plug. It is a simple and compact option that is often used where only one appliance needs to be connected.

Single sockets are particularly useful when an appliance is expected to remain in one place and there is no realistic need for a second outlet nearby.

They are commonly installed for appliances such as:

Fridges and freezers.
Washing machines.
Dishwashers.
Boilers.
Extractor fans.
Built-in kitchen appliances.

Because a single socket takes up less wall space, it can also be useful in narrow areas, inside cupboards or behind appliances where a larger faceplate may be awkward to fit.

In these situations, using a single socket can help keep the installation neat and avoid adding an outlet that is unlikely to be used.

What Is a Double Socket?

A double socket has two plug outlets within one faceplate. This allows two appliances or devices to be connected in the same location without using a separate adaptor.

Double sockets are widely used throughout UK homes because they provide greater flexibility and do not take up significantly more wall space than a single socket.

They are commonly installed in:

Living rooms.
Bedrooms.
Kitchens.
Home offices.
Dining rooms.
Hallways.

In rooms where several devices are used regularly, a double socket is usually the more convenient choice. It may also reduce the need for extension leads, which can make the room look tidier and easier to use.

What Is the Main Difference Between a Single and Double Socket?

The main difference is the number of outlets available.

A single socket allows one appliance to be connected, while a double socket allows two appliances or devices to be plugged in at the same location.

This may sound like a small difference, but it can have a noticeable effect on how practical a room feels. In a bedroom, for example, a single socket may only be enough for a bedside lamp. A double socket allows both a lamp and a phone charger to remain connected.

Single sockets are therefore often used for dedicated appliances, while double sockets are normally chosen for general household use.

Where Should You Use a Single Socket?

A single socket is often the better option when only one appliance will be connected and a second outlet would serve no real purpose.

Suitable locations may include:

Behind a washing machine or dishwasher.
Behind a fridge or freezer.
Near a boiler or heating control.
Inside a kitchen cabinet for a dedicated appliance.
In a narrow space where a double socket may not fit comfortably.

For fixed appliances, a single socket can create a cleaner installation and make it clear that the outlet is intended for one specific item.

It can also prevent an unused second outlet from being hidden behind an appliance where it would be difficult to access safely.

Where Should You Use a Double Socket?

Double sockets are usually the better choice in rooms where different appliances and devices may be used throughout the day.

They are particularly useful for:

Televisions and entertainment equipment.
Computers, monitors and printers.
Phone and tablet chargers.
Bedside lamps and alarm clocks.
Kitchen appliances.
Vacuum cleaners and temporary appliances.

When planning a renovation or new electrical installation, it is worth thinking about how the room may be used in the future, not only how it is used today.

A room that currently needs only one outlet may later be used as a home office, bedroom or entertainment space. Installing enough sockets during the original work is usually easier and less disruptive than adding more at a later date.

Learn more in our guide How Many Sockets Should a Room Have?.

Are Double Sockets Safer Than Single Sockets?

Neither type is automatically safer. A correctly manufactured and properly installed single socket should be just as safe as a double socket.

The safety of a socket depends on several factors, including the condition of the wiring, the quality of the electrical accessory and the way the socket is used.

However, fitting a double socket where two outlets are regularly needed may reduce the use of multi-plug adaptors and extension leads connected to a single outlet.

You should stop using a socket and arrange for it to be checked if you notice:

Unusual heat around the socket or plug.
A burning smell.
Crackling or buzzing sounds.
Brown marks or discolouration.
A loose switch or faceplate.
A plug that does not sit securely.
Visible cracks or other damage.

High-power appliances should always be used according to the manufacturer’s instructions. Avoid connecting several high-demand appliances through the same adaptor or extension lead.

For more information, read Are Smart Plugs Safe for Heaters, Kettles and High-Power Appliances?.

Can You Replace a Single Socket with a Double Socket?

In many cases, a single socket can be replaced with a double socket, but it may not be a simple faceplate change.

A standard double socket normally requires a wider back box than a single socket. This means the wall opening may need to be enlarged and a different back box may need to be installed.

The installer should also check:

The condition of the existing wiring.
The size and depth of the back box.
The amount of space available in the wall.
The circuit arrangement.
Whether the new socket is suitable for the installation.

Surface-mounted conversion options may be available in some situations, although the final appearance will be different from a flush-mounted socket.

Read our guide How to Choose the Right Back Box Depth in the UK for more information.

If you are unsure whether the existing installation can be changed safely, ask a qualified electrician to inspect it.

Should You Choose a Single or Double Socket for a Bedroom?

A double socket is normally the more practical choice for a bedroom because several devices are often used in the same area.

Near a bed, for example, you may want to connect a lamp, phone charger, alarm clock, electric blanket or television. A single socket can quickly become limiting, especially if more than one person uses the room.

Double sockets can also reduce the need for extension leads beside the bed, which may help keep cables more organised.

A single socket may still be suitable for a dedicated item, such as a wall-mounted television or a fixed appliance, but for general bedside use a double socket is usually the better option.

Should You Choose a Single or Double Socket for a Kitchen?

Both single and double sockets can be useful in a kitchen, but they are normally used in different situations.

Single sockets may be suitable for fixed or built-in appliances such as:

Fridges and freezers.
Washing machines.
Dishwashers.
Cooker hoods.
Other permanently positioned appliances.

Double sockets are usually more practical above worktops, where several small appliances may be used during the day.

These may include:

Kettles.
Toasters.
Coffee machines.
Blenders.
Air fryers.
Phone chargers.

The number and location of kitchen sockets should be planned around the layout of the room and the appliances that will be used.

Should You Choose a Single or Double Socket for a Home Office?

A double socket is almost always the more practical choice in a home office.

Even a simple desk setup may include a computer, monitor, printer, lamp, phone charger and router. One single socket is unlikely to provide enough capacity without the use of an extension lead.

In larger offices, several double sockets may be needed around the desk and other work areas.

It is worth planning for future equipment as well. A home office that starts with a laptop may later include additional screens, speakers, chargers or other accessories.

Do Double Sockets Use More Electricity?

No. A double socket does not use more electricity simply because it has two outlets.

Electricity consumption depends on the appliances connected to the socket and how much power those appliances draw.

If only one device is plugged into a double socket, the unused outlet does not consume electricity on its own.

If two appliances are connected, the total electricity use will be the combined consumption of both appliances.

Can You Plug Two High-Power Appliances into a Double Socket?

Two appliances can be connected to a double socket, but extra care is needed when both appliances have a high power demand.

Examples of high-power appliances may include kettles, heaters, tumble dryers and some cooking appliances.

The fact that a socket has two outlets does not mean that every combination of appliances is suitable. The circuit, socket and connected equipment must all be able to handle the load safely.

If a plug or socket becomes unusually warm, stop using it and arrange for it to be checked.

Are Switched Sockets Better?

Most standard UK single and double sockets include switches that allow the power supply to be controlled directly at the outlet.

Switched sockets are often more convenient because an appliance can be turned off without removing the plug.

Unswitched sockets can also be suitable in some installations, particularly behind fixed appliances or where the outlet is controlled by a separate switch.

Read our guide Switched vs Unswitched Sockets: What’s the Difference?.

Frequently Asked Questions

What is the difference between a single and double socket?

A single socket provides one plug outlet, while a double socket provides two outlets within one faceplate.

Are double sockets better than single sockets?

Double sockets are usually more practical for bedrooms, living rooms, kitchens and home offices. Single sockets remain useful for dedicated appliances and areas with limited space.

Can a single socket be changed to a double socket?

In many cases, yes. However, the back box, wiring and available wall space must be suitable for the replacement.

Do double sockets use more electricity?

No. Electricity consumption depends on the appliances connected to the socket, not the number of outlets on the faceplate.

Do double sockets need a different back box?

A standard double socket normally requires a wider back box than a standard single socket. The required depth may depend on the socket design and the amount of wiring behind it.

Should I use single or double sockets in a new home?

Double sockets are usually the more flexible choice for general living spaces. Single sockets can be used for fixed appliances or in places where only one connection is needed.

Can I use a double socket behind a washing machine?

It may be possible, but a single socket is often sufficient for a dedicated appliance. The location should also allow the appliance to be disconnected safely when required.

Are single sockets outdated?

No. Single sockets are still widely used where only one appliance needs to be connected or where space is limited.

Final Thoughts

Single and double sockets both have useful roles in a modern home, and the right choice depends on how the room will be used.

Single sockets are a good option for dedicated appliances, concealed installations and narrow spaces. Double sockets are normally more practical for everyday living areas where several devices may need to be connected.

For most bedrooms, living rooms, kitchens and home offices, double sockets offer better flexibility and may reduce the need for extension leads. When planning an installation, it is worth considering both your current needs and how the room may be used in the future.