Adding Extra Sockets in Southampton — What You Need to Know

The demand for electrical sockets in a modern home has outpaced the supply in almost every property built before 2010 — and in many built since. A household that runs laptops, tablets, phone chargers, smart speakers, gaming consoles, streaming devices and kitchen appliances simultaneously needs considerably more socket capacity than the original installation was designed to provide. The result is a proliferation of extension leads and multi-socket adaptors that are both inconvenient and — when overloaded — a genuine fire risk.

Southampton’s housing stock makes this a particularly common concern. The Victorian and Edwardian terraces of Shirley, Bitterne and the streets around Portswood, the inter-war semis of Bassett and Swaythling, and the post-war estates across Thornhill, Weston and Lordshill all contain properties where the original wiring was designed for a fraction of the electrical load that a modern household places on it. Even many properties from the 1980s and 1990s across Hedge End and Eastleigh were built with socket numbers that feel inadequate by current standards.

Adding extra sockets is one of the most frequently requested electrical jobs across Southampton — and one of the most misunderstood in terms of what it involves, what it costs, and the regulatory requirements that apply.

Do You Need a Registered Electrician?

The short answer is yes — and the reason matters.

Adding a new socket to an existing circuit, or installing a new circuit from the consumer unit to serve additional socket outlets, is notifiable work under Part P of the Building Regulations. This means it must either be carried out by an electrician registered with a government-approved competent person scheme — NICEIC, NAPIT or ELECSA are the main ones — or notified to building control separately with an independent inspection carried out before the work is covered up.

In practice, using a registered local electrician is the only sensible route. A scheme member self-certifies the work, issues the appropriate certificate, and notifies building control on your behalf. The work is done, documented, and legally compliant without any additional process required from you.

The competent person requirement applies even to straightforward socket additions — not just complex rewires or consumer unit changes. This surprises some homeowners who assume that adding a socket is minor enough to fall outside the regulations. It does not. Any work that involves adding a new circuit or extending an existing one in a kitchen, bathroom or special location, or that involves work on the consumer unit, is notifiable regardless of scale.

There is a specific and limited exception for like-for-like replacements — swapping a damaged socket for a new one in the same position without extending the circuit. That does not require notification. Everything beyond that does.

What the Process Involves

Adding extra sockets to a Southampton property is a more straightforward job than most homeowners expect — but it involves more than simply cutting a hole in the wall and connecting a cable.

Assessing the Existing Installation

Before any new sockets are installed, a competent electrician will assess the existing installation to establish what the current circuits can support. The key questions are whether the circuit intended to supply the new sockets has adequate capacity for the additional load, whether the consumer unit has the right protection for the circuit involved, and whether the existing wiring is in a condition suitable for extending.

In older Southampton properties — the Victorian terraces of Shirley and the Edwardian stock around Bedford Place and the Polygon — the existing wiring can vary considerably. Some properties have had full or partial rewires at various points and have a reasonably modern installation. Others have a patchwork of different cable types from different eras that needs careful assessment before anything is added to it. An electrician who simply connects new sockets to whatever cable is available without assessing the overall installation is not doing the job properly.

Cable Routing

New cables need to run from the existing circuit to each new socket position. In most properties this involves running cable either beneath floorboards, through ceiling voids, or chased into the plaster of the wall. Each approach has different implications for the disruption caused and the making good required afterwards.

Surface-mounted cable in trunking is the least disruptive option — no lifting of floors or chasing of walls — but is not always visually acceptable in living spaces. Concealed cable beneath floorboards or chased into walls leaves a cleaner finish but requires the floors to be lifted or the plaster surface to be cut, filled and made good after the cable is in place.

In Southampton’s older properties, solid brick walls and original timber floors present different challenges to the hollow stud walls and chipboard floors of newer construction. Both are workable — but the time and making good involved varies.

Socket Positioning

The position of new sockets needs to comply with the requirements of BS 7671. In kitchens and bathrooms — defined areas with specific safety requirements around socket positioning relative to water sources — the rules are more prescriptive. In living rooms, bedrooms and hallways, positioning is more flexible but still needs to account for cable routing practicality and final aesthetic.

Floor-level sockets, sockets inside cupboards or furniture, and sockets in unusual positions all have specific requirements that a registered electrician will be familiar with.

Testing and Certification

Once the new sockets are installed and all connections made, the circuit needs to be tested before the work is signed off. Testing confirms that the circuit is correctly wired, that polarity is correct, that the earth path is intact, and that the protective devices at the consumer unit will respond correctly to a fault. On completion, an Electrical Installation Certificate or a Minor Electrical Installation Works Certificate is issued depending on the scope of the work.

This certificate is a legal document. You will need it when you come to sell the property — it provides evidence that the electrical work has been carried out to the required standard by a registered competent person. Always ask for it and keep it with your other property documents.

What Does It Cost to Add Extra Sockets in Southampton?

Costs vary depending on how many sockets are being added, how complex the cable routing is, and whether new circuits are needed from the consumer unit or whether existing circuits can be extended.

Realistic current prices from a registered Southampton electrician:

• Single additional double socket — surface-mounted: £80–£150
• Single additional double socket — flush-mounted (chased in): £120–£200
• Two to four sockets added to an existing circuit: £200–£450
• New dedicated circuit from consumer unit (up to 4 sockets): £350–£650
• USB socket or combination socket: add £15–£40 per socket over standard
• Kitchen socket additions (specialist zone requirements): £180–£350 per socket

These are installed prices including materials, testing and certification. They do not include replastering or redecoration after cable chasing — budget for this separately if the sockets are being flush-mounted in plasterwork.

Southampton sits broadly in line with the wider South coast market for electrical labour — above the national average but below London. For SO14 to SO19 postcodes and the surrounding Hampshire area, the figures above reflect realistic current pricing.

How Many Sockets Do You Actually Need?

This is a useful question to think through before booking an electrician — because the cost of adding four sockets at the same time as two is modest compared with having the work done in two separate visits.

The guidance from the IET (the body responsible for the UK wiring regulations) suggests minimum socket numbers per room for a modern household — but these are minimums, and most electricians and interior designers working on new-build and renovation projects in Southampton would suggest going above them where practically possible.

As a practical guide for different room types:

Living room: a minimum of eight to ten double sockets for a typical modern setup — TV, soundbar, streaming device, games console, phone charging, lamp and general use. In older Southampton properties where original provision might be two or four sockets, this often requires a dedicated circuit rather than extending an existing one.

Kitchen: modern kitchens require a significant number of dedicated circuits and socket outlets. Large appliances — fridge, washing machine, dishwasher — typically have dedicated unswitched spurs. Counter-level sockets for small appliances should be plentiful and positioned for practical use. A kitchen with fewer than eight accessible counter-level sockets feels inadequate within a year of moving in.

Home office or study: at minimum four to six double sockets, plus consideration of data cabling if the space is used for serious work. USB sockets or combination sockets with USB-A and USB-C ports are worth specifying in a home office setting.

Bedrooms: four double sockets as a minimum for a modern bedroom — bedside charging, wardrobe lighting, television and general use. Children’s rooms in particular quickly feel under-provided as the children grow and the number of devices they use increases.

Can You Add Sockets Yourself?

Technically a homeowner can carry out some electrical work in their own property under the Building Regulations — but the scope of what is permitted without notification is very narrow, and adding new sockets sits outside it in most circumstances.

Even where the work itself might be carried out safely by a competent DIYer, the ability to test and certify the work to the standard required by BS 7671 requires calibrated test equipment and the knowledge to interpret the results correctly. Without certification, the work is not legally compliant, will not be covered by building control, and may create problems when the property is sold.

The practical and legal position for most Southampton homeowners is clear — use a registered electrician, get the work certified, and have documentation that confirms the work is safe and compliant.

Getting Extra Sockets Installed in Southampton

If you are based in Southampton, Eastleigh, Hedge End, Chandler’s Ford, Romsey or anywhere across Hampshire, we are happy to come out and assess what you need. We will advise on the most practical way to add the sockets you want — whether that involves extending existing circuits or adding new ones — and give you a clear fixed price for the work. Get in touch to arrange a visit.