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Hiring, rules and certificates

Buying a House? The Electrical Checks Worth Making

A rewire is the kind of surprise nobody wants after completion. A few checks before you buy can save you thousands – and a lot of dust.

3 min read · Updated October 2026

House with a Sold sign and a magnifying glass over its consumer unit

What to look at during viewings

You don't need to be an expert to spot clues:

  • The consumer unit: old fuse box, wooden backboard or no RCD 'Test' button
  • Old-style sockets, round-pin sockets or sockets in skirting boards
  • Brown or black switches and old pattress boxes
  • Too few sockets and lots of extension leads
  • Scorch marks or discoloured sockets
  • Signs of DIY: odd cables clipped to walls or dangling light fittings

Documents to ask for

Ask the seller for electrical installation certificates, building regulations certificates for notifiable work and any recent EICR. Your conveyancer will often ask too, especially for work such as extensions or new consumer units.

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Your survey isn't an electrical test

A building survey may flag electrical concerns, but surveyors don't test circuits. If you have any doubts – or the house is older – commission an EICR before exchange. It gives you a clear picture and, if work is needed, a basis for renegotiating.

Common questions

How much does a pre-purchase EICR cost?

Similar to any EICR – it depends on the size of the property. See our prices guide for ranges.

Can I negotiate on price if the house needs a rewire?

You can certainly try, using the EICR and quotes as evidence.

Should I get an EICR on a new-build?

Usually not needed, but check you receive the installation certificate.

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