How to Price Adding Extra Sockets
Adding a socket is rarely just adding a socket. The price is driven by how you get power to it, the chasing and making good, and whether the existing circuit can safely take the addition.
"Can you just add a couple of sockets" is one of the most requested small jobs in domestic work — and one where the labour to run and conceal the cable dwarfs the cost of the accessory. Pricing it well means understanding the existing circuit and being honest about the mess.
This guide covers how to assess the circuit, the ways to feed a new socket, what makes one job twice the price of another, and how to certify and quote it. Additions to an existing circuit are notifiable only in special locations, but always require a Minor Electrical Installation Works Certificate.
Key takeaways
- The accessory is cheap; the cable run, chasing and making good are the real cost.
- Check the existing circuit can take the load and is in good condition before adding to it.
- A spur off a ring feeds one single or double socket — know the rules before you quote.
- Every socket addition needs a Minor Works Certificate with test results.
- Surface trunking is cheaper than chasing — offer both and let the customer choose.
Assess the existing circuit first
Before adding anything you need to know what you are connecting to: is it a ring final or a radial, what size and type of protective device, is there RCD protection, and is the circuit in good condition? Adding a socket to a tired circuit with poor insulation resistance simply inherits the problem.
Confirm there is spare capacity and that the addition will not overload the circuit. If the circuit is unsuitable, the honest — and more profitable — answer may be a new dedicated circuit, which is a different quote entirely.
Spur rules in brief
A non-fused spur off a ring final may feed one single or one double socket. Beyond that you need a fused connection unit or a fresh circuit — price accordingly.
How you feed the socket drives the price
The cheapest route is a short spur from a nearby socket in surface trunking. The dearest is a concealed cable chased into plaster, run under floors or through joists, with plastering and decoration to make good afterwards. The distance, the wall construction (brick, block, dot-and-dab, stud), and whether floors come up all change the hours dramatically.
Always price the making good, or state clearly that it is excluded. A customer who expects a painted-in finish and gets bare plaster will not pay happily.
Doing this on a job? Job pricing calculator — part of TradePlanr. Free to start, no card needed.
Labour, materials and certification
Materials are minor — cable, accessory, back box, trunking or capping. Price the job on labour against your day or half-day rate, and never forget the testing and certification time. Even a single spur must be tested (continuity, polarity, insulation resistance, Zs and RCD where fitted) and recorded on a Minor Works Certificate.
For multiple sockets in one visit, your travel and setup are amortised, so a job of four sockets is not four times the price of one — reflect that in your quote to stay competitive.
Certify it before you leave
TradePlanr lets you complete and sign the Minor Works Certificate on your phone with the test results, so the customer has proof the addition is safe before you pack up.
Quoting cleanly
Offer the customer a clear choice where it exists: surface trunking at a lower price, or chased and made good at a higher one. Spell out what is included — cable, accessory, test and certificate — and what is not, such as redecoration. This turns a vague "add a socket" into a professional, comparable quote.
From guidance to action
Frequently asked questions
Is adding a socket notifiable work?
Adding a socket to an existing circuit is generally not notifiable unless it is in a special location such as a bathroom. It always requires a Minor Electrical Installation Works Certificate with test results.
How many sockets can I spur off a ring?
A non-fused spur off a ring final circuit may supply one single or one double socket-outlet. To feed more from that point you need a fused connection unit or a new circuit.
Why does adding sockets vary so much in price?
The accessory is cheap. The cost is the cable route: a short surface spur is quick, while a concealed cable chased into a solid wall with plastering and decoration to make good takes far longer.
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