Signs Your House Needs Rewiring
- How urgent
- High risk
- Who fixes it
- An electrician
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.
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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.
What will the electrician actually do?
- Carry out an EICR to formally assess the installation
- Provide a detailed report with observations and recommended actions
- Quote for a full or partial rewire based on the findings
- Remove old cables and install new PVC twin-and-earth to current standards
- Fit a new consumer unit with RCD or RCBO protection
- Test and certify the completed installation
Who fixes this
What it usually costs
- EICR Cost
- £100–£330
- House Rewiring Cost UK 2026
- £3,900–£10,000
Questions people ask
What are the main signs my house needs rewiring?
How long does a full rewire take?
Do I need to rewire when buying an old house?
Will a rewire add value to my property?
Sources & References
Before you book, read how to check an electrician is qualified.
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