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Rooms, sockets and installations

Adding Sockets and Switches: A Planning Guide

More sockets in the right places makes a home safer and easier to live in. Here's how to plan what you need before you get quotes.

3 min read · Updated October 2026

Two-gang light switch, dimmer switch and double socket with USB ports on a living room wall

Plan room by room

Walk through each room and think about where you use power: the TV, desk, bedside tables, kitchen worktop and garden. Mark where sockets would avoid extension leads. Doubles are almost always better than singles.

  • Kitchens: sockets above worktops for every appliance, plus spares
  • Living rooms: sockets near the TV and on several walls
  • Bedrooms: double or USB sockets both sides of the bed
  • Home offices: plenty of sockets at desk height
  • Outside: a weatherproof socket for the garden

Switches and controls

Two-way switching at the top and bottom of the stairs, dimmers in living rooms and smart switches are popular upgrades. Dimmers must be compatible with LED bulbs, and some smart switches need a neutral wire at the switch.

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What the electrician will check

Before adding sockets, the electrician checks the existing circuit's condition and capacity. If it's suitable, sockets can be added to it; if not, a new circuit may be needed. Older installations may need remedial work first.

Common questions

How much does it cost to add a socket?

Adding a double socket to an existing circuit often costs around £100–£220. See our sockets and switches page.

Can sockets go in bathrooms?

Standard sockets aren't normally allowed except well away from the bath or shower. Shaver sockets are the usual alternative.

Do I need a certificate?

Additions to existing circuits usually get a minor works certificate; new circuits get an installation certificate.

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