How often should you rewire a house?
By Azzeddine Kebbi, NAPIT-registered electrician and director of Kebbi Electrical Services · Updated 10 November 2026
There is no set number of years after which a house must be rewired. Modern PVC cable can last for decades, while old rubber-insulated or lead-sheathed wiring is usually past its safe life. The way to know is an EICR, which reports the condition of your wiring.
Signs your wiring may need replacing
- Rubber, fabric or lead-covered cables.
- Round-pin sockets or light switches on wooden pattresses.
- No earth on the lighting circuits.
- An old fuse box with rewireable fuses.
- Scorch marks, buzzing, a burning smell or lights that flicker.
What affects wiring lifespan
Cable type
Old rubber insulation goes brittle. PVC cable lasts much longer.
Heat
Cables under insulation or overloaded circuits age faster.
Changes over the years
DIY alterations and extra spurs can leave the wiring unsafe.
Damage
Rodents, damp and building work can damage cables.
Full or partial rewire?
Sometimes only some circuits need replacing. An EICR shows which circuits are in poor condition so you can decide.
Common questions
How long does house wiring last?
There is no fixed lifespan. Well-installed PVC wiring often lasts decades. Older rubber-insulated wiring is usually due for replacement.
How do I know if my house needs rewiring?
Look for the signs above, but the reliable way is an EICR by a registered electrician.
Do I need to rewire before buying a house?
Not necessarily. A home buyer EICR shows the condition first, so you know what you are buying.
Does a rewire need a certificate?
Yes. A rewire is notifiable and gets an Electrical Installation Certificate, and building control is notified.
Think your house needs a rewire?
See our full and partial rewires in Bristol and home buyer EICR.