How to replace a light switch

Difficulty Intermediate Time 1-2 hours Materials £3–£15 Steps 6
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Intermediate1-2 hours
Always turn off the power at the circuit breaker before starting work.
Do it yourself
£3–£15
parts & materials, about 1-2 hours of your time
Hire a pro
£50–£100
typical all-in price
Doing it yourself could save roughly £35
Rough estimates for guidance only — actual costs vary by job, materials and local prices. Get real quotes.

Tools you'll need

ScrewdriverWire stripperVoltage tester

Parts & materials

Light switch
Typically need: 1
£2-£10
per each
Electrical wire connectors
Typically need: 1
£1-£5
per pack

Estimated materials total: £3–£15. Prices vary by region and retailer.

Step by step

  1. 1 Turn off power Locate the circuit breaker and turn off the power to the switch you are replacing. 10 min
  2. 2 Remove the old switch Unscrew the faceplate and the switch from the wall, then disconnect the wires. 20 min Screwdriver
  3. 3 Test for power Use a voltage tester to ensure that the wires are not live before proceeding. 5 min Voltage tester Ensure the wires are not live to avoid electric shock.
  4. 4 Connect the new switch Attach the wires to the new switch using wire connectors, matching the connections as they were on the old switch. 15 min Wire stripper
  5. 5 Secure the switch Screw the new switch into the wall and replace the faceplate. 10 min Screwdriver
  6. 6 Turn on power Return to the circuit breaker and turn the power back on to test the new switch. 5 min

Permits, safety & disposal

Safety rules
  • Always turn off power at the circuit breaker before starting work.
  • Use a voltage tester to ensure wires are not live.
  • Follow the manufacturer's instructions for the switch.
Check locally

Confirm any local regulations with Reading Borough Council.

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This guide is AI-generated for general help and may not fit your exact situation. Know your limits — when in doubt, hire a licensed pro.