What are the main signs my house needs rewiring?

Key signs include: flickering lights, frequent tripping, burning smells from sockets, discoloured or warm faceplates, old round-pin sockets, a fuse box with rewirable fuses, and any visible cloth or rubber wiring.

How long does a full rewire take?

A typical 3-bedroom house takes 5–10 working days. You can usually stay in the property during the work, though there will be disruption and dust.

Do I need to rewire when buying an old house?

Not necessarily, but you should always get an EICR before purchasing. The report will tell you whether a rewire is needed. Mortgage lenders may also require one for older properties.

Will a rewire add value to my property?

Yes. A new electrical installation with a valid certificate reassures buyers and can add value. It also removes a potential bargaining chip for buyers during price negotiations.

High risk

Updated 30 August 2026

Signs Your House Needs Rewiring

You are noticing warning signs that your home's electrical wiring may be outdated or unsafe.

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What's happening?

A rewire involves replacing all or most of the electrical cables in a home. Age alone does not determine whether a property needs rewiring: the installation's condition, test results, alterations, and signs of damage matter. Warning signs include frequent tripping, flickering lights, burning smells, discoloured sockets, old-style round-pin sockets, or a fuse box with rewirable fuses.

What usually causes it?

Inspection or testing has found degraded cable insulation
Property still has original wiring from the 1960s or earlier
Frequent electrical faults, tripping, or blown fuses
Previous alterations were done without upgrading the main wiring
An EICR has returned a C1 (danger present) or C2 (potentially dangerous) classification

Is it dangerous?

Wiring with degraded insulation, missing protective conductors, unsafe alterations, or inadequate protection can create shock and fire risks. If you see warning signs, stop using the affected circuit where it is safe to do so and arrange an inspection.

Can I fix it myself?

No. Assessing and replacing wiring is skilled work that must comply with BS 7671 and Part P of the Building Regulations. You can, however, look for warning signs yourself: check for old round-pin sockets, look at the wiring in your loft or under floorboards, and note any recurring electrical problems.

When should you call an electrician?

Arrange an EICR if you have noticed warning signs, the installation's condition or inspection history is unknown, or a previous report recommends another inspection. Electrical Safety First recommends periodic inspection at up to ten-year intervals for owner-occupied homes and up to five years for rented homes; legal duties depend on the UK nation and the property's tenure.