Adding sockets is one of the most requested small jobs in domestic electrical work, and the price range is wide enough to confuse people. The variation is entirely about access and wall construction, not about the accessory. This guide explains what determines the cost, when a spur is appropriate, and how to get the most from one visit.
What actually drives the price
The determining factors are how far the new position is from an existing circuit, what the wall is made of, whether the floor void is accessible, and whether the finish must be made good afterwards.
A new socket on the other side of a stud wall from an existing one is quick. A socket in the middle of a tiled solid wall, fed from a floor below with a laminate finish, is a different job entirely, and the making good may cost more than the electrical work.
Surface mounted versus flush
Surface mounted sockets with trunking are considerably cheaper because there is no chasing and no plastering. They are entirely acceptable in garages, utility rooms, lofts and workshops.
Flush sockets in a finished room need the wall chased, a back box set in, and the chase filled and made ready for decoration. That is the main cost difference between the two approaches.
Spurs, and when they are appropriate
A spur takes a connection from an existing circuit to feed one additional point. On a ring final circuit, an unfused spur may feed a single socket, and only one spur is permitted from each point on the ring. A fused connection unit can feed more, at reduced capacity.
Spurs are a legitimate technique, not a shortcut, but they are not always appropriate. If a circuit is already heavily loaded or has been spurred repeatedly by previous occupants, the correct answer is a new circuit rather than another spur. An electrician will check the existing circuit before deciding.
When a new circuit is the better answer
If you want several sockets in one area, particularly for a home office, workshop, garage or utility, a dedicated circuit from the board is often better value than multiple spurs. It gives proper capacity, keeps a fault in that area away from the rest of the house and is easier to extend later.
- Home offices with several high draw devices
- Garages, workshops and garden rooms
- Utility rooms with washing machine and tumble dryer
- Any area where four or more new points are wanted
Batching work to save money
Most of the cost of a small job is the visit: travel, setting up, isolating, testing and clearing up. Doing five small jobs in one visit costs far less than five separate visits. If you want a socket added, keep a list of the other small items and have them all done together.
Typical companions are replacing tired accessories, adding a USB socket, fitting an outdoor socket, adding a shaver point or sorting out a light that has never worked.
Certification for small work
Adding a socket to an existing circuit is normally minor works, and you should receive a minor electrical installation works certificate recording the test results. A new circuit is notifiable and comes with an electrical installation certificate and building control notification.
Either way, you should receive paperwork. Work with no certificate is a problem at sale and gives you no record of what was tested.
Practical positioning advice
Think about furniture, not just walls. Sockets behind a sofa or wardrobe are wasted. Height matters too: raising sockets to around 450 millimetres makes them far easier to reach and is standard in new build.
In kitchens and home offices, more sockets in fewer clusters beats a single double socket per wall. Extension leads are what you get when the fixed provision is inadequate, and they are a common cause of overload.
Planning ahead in a refurbishment
If a room is being redecorated, replastered or refitted, that is the moment to add every socket you might want for the next decade. The cable routes are open, the walls are being made good anyway and the incremental cost per additional point falls sharply. Sockets added later into a finished room cost several times as much for exactly the same electrical work, purely because of access and making good.
Common questions
- How much does one socket cost?
- It depends almost entirely on access and wall type. Surface mounted in a garage is a fraction of a flush socket in a tiled room.
- What is a spur?
- A connection taken from an existing circuit to feed an additional point, subject to specific limits.
- Is a spur safe?
- Yes when correctly applied. Repeated or overloaded spurring is not, which is why the existing circuit is checked first.
- Do I get a certificate?
- Yes, a minor works certificate for an addition, or a full certificate for a new circuit.
- Can several sockets be done in one visit?
- Yes, and it is much better value than separate visits.
Got a list of small jobs? We do them in one visit with proper testing and certification. Ask for a quote.
Related guides
- Adding Sockets Instead of Living With Extension LeadsExtension leads are a symptom: the room has fewer outlets than the way you live in it.
- Moving, Raising and Replacing SocketsThe best time to move a socket is the week before you decorate, not the week after.
- USB Sockets Versus Plug-In ChargersBuilt-in USB is about tidiness and permanence rather than raw charging speed.