Outdoor Socket Installation Cost: UK Price Guide 2026

An outdoor socket is one of the most commonly requested domestic electrical jobs in the UK. Homeowners want power in the garden for lawnmowers, pressure washers, lighting, hot tubs, and electric barbecues. The installation is straightforward for a qualified electrician, but the cost varies significantly depending on the cable route and groundwork required.

The typical price range is £150 to £400 for a single IP66 rated outdoor socket. The lower end applies where the cable runs directly through an external wall behind the consumer unit. The higher end applies where underground SWA cable, trenching, and surface reinstatement are needed.

This guide breaks down the costs, explains the technical requirements under BS 7671, and covers Part P notification, IP ratings, RCD protection, and cable selection.

The table below shows typical costs for outdoor socket installation in the UK. All prices include materials and labour unless stated otherwise. Prices are based on trade rates and a qualified electrician registered with a competent person scheme.

Additional costs may apply if the consumer unit has no spare ways (add £80 to £150 for a new RCBO or small enclosure), if patio slabs or concrete need cutting and reinstating (add £100 to £200), or if the installation requires Building Control notification (£100 to £300 if not self-certified via a competent person scheme).

IP (Ingress Protection) ratings define how well an enclosure protects against dust and water. For outdoor sockets in the UK, the minimum recommended rating is IP66:

When specifying an outdoor socket, check the IP rating with the lid both open and closed, and with a plug inserted. Some budget sockets achieve IP66 with the lid closed but drop to IP44 when a plug is inserted. For permanently connected equipment, this is acceptable. For general use where the socket may be left open in rain, choose a socket that maintains at least IP55 with the plug in place.

BS 7671 requires that socket outlets with a rated current not exceeding 32A installed outdoors or in locations where there is an increased risk of electric shock must be protected by a 30mA RCD. This is a mandatory requirement, not a recommendation.

The cable route is the single biggest factor in the overall cost of an outdoor socket installation. The three common approaches are:

For cable runs exceeding 20 metres, voltage drop becomes a consideration. Use the voltage drop calculator to check that the total voltage drop does not exceed 5% (11.5V) at full load. Longer runs may require upsizing from 2.5mm² to 4.0mm² SWA.

In England and Wales, installing an outdoor socket is notifiable work under Part P of the Building Regulations. This is because outdoor locations are classified as special locations, and the work involves adding a new circuit (or extending an existing circuit to a special location).

In Scotland, the Building Standards system applies. Electrical work in dwellings does not require a building warrant provided it is carried out by a competent person. In Northern Ireland, Part P applies similarly to England and Wales.

While some homeowners consider installing an outdoor socket themselves, this is not recommended and in most cases not legally compliant:

The cost difference between DIY and professional installation is modest — materials cost £30 to £60, while a professional installation is £150 to £400 including materials, testing, certification, and Part P compliance. The professional route includes an Electrical Installation Certificate that confirms the work meets BS 7671.

Outdoor socket installations are bread-and-butter work for domestic electricians. They are quick to complete, have good margins, and often lead to additional work (garden lighting, EV charger preparation, hot tub supply). Here is how to quote them accurately:

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