Full electrical installation for single or double storey extensions including consumer unit upgrade if required, new circuits, sockets, lighting, and heating provisions.
Typical cost
£1,200 — £2,500
Typical duration
3-5 days
Certificate
Part P certified electrician required
Scope type
flexible
Typical tasks
First fix cable routes during build
Assess if consumer unit upgrade required
Install sockets, switches, and pendants second fix
Wire heating and any underfloor provisions
Test, inspect, and certify extension circuits
Extras & additional works
Based on a standard 20m² extension, costs may increase if additional circuits or complex wiring is required.
Common questions Stainesai
The price is influenced by the size of the extension, the number of sockets and circuits needed, and any required consumer unit upgrades.
Yes, extension electrical works are notifiable under Part P Building Regulations and require certification upon completion.
Typically, it takes 3-5 days to complete the electrical works for a standard-sized extension.
Generally, the electrician will supply the necessary materials for the job, unless specified otherwise.
The works include first fix cable routes, socket and switch installation, wiring for heating, and testing and certification with an Electrical Installation Certificate (EIC) for notifiable work. Always confirm with your electrician before work begins.
Ready to post a extension electrical works job?
Describe what you need. Stainesai structures it into a proper scope. Your first job post is free.