Yes — adding sockets is one of the most common electrical jobs in the UK. It must be done by a Part P registered electrician or notified to Building Control if in certain locations.
🏠Homeowner view
Adding extra sockets is very common and completely legal with the right approach. In most rooms (living room, bedroom, hallway), adding a socket is relatively straightforward and typically costs £100–250 per socket depending on how far it is from existing wiring. The work must either be done by a Part P registered electrician (who self-certifies the work) or, if you do it yourself, notified to your local Building Control before starting. The exception is kitchens — any new socket in a kitchen counts as notifiable work regardless of who does it. Adding a fused spur (a permanently wired connection) from an existing socket is simpler than running a new circuit. If you have no existing sockets nearby, a new dedicated circuit from the consumer unit is needed, which adds cost. Never daisy-chain multiple extension leads permanently — this is a fire risk.