Signs Your Home Needs Rewiring

Electrical wiring doesn't last forever. Most cables installed before the 1970s are now well past their design life, and some show it clearly. Others hide the problem behind plaster and plasterboard. Here's how to spot the signs before they become a danger.

Warning Signs You Shouldn't Ignore

• Lights flicker or dim for no obvious reason, especially on one circuit consistently
• Breakers trip repeatedly on the same circuit without a clear cause
• Burning or hot plastic smell near sockets, switches, or the consumer unit
• Scorch marks or discolouration around sockets or switch faceplates
• Sockets feel warm or produce a mild buzzing sound when a device is plugged in
• You have old round-pin sockets, brown-and-green or lead-sheathed cables, or a fuse box made of bakelite
• An EICR (electrical inspection) has returned a C1 or C2 observation on the wiring

How Old Is Too Old?

As a rule of thumb:

• Pre-1960s wiring: rubber-insulated cables. These are beyond their design life and should be replaced.
• 1960s-1970s PVC wiring: depending on condition, may be serviceable but often requires attention
• Post-1990s wiring: usually fine if installed correctly and not subject to damage or DIY alterations

The only way to know for certain is an EICR carried out by a qualified electrician.

Full Rewire vs. Partial Rewire

A full rewire means replacing all the fixed wiring in the property: every circuit from the consumer unit outward. This is the right approach when:

• The existing wiring is rubber-insulated or lead-sheathed throughout
• An EICR has returned multiple C1 and C2 observations across several circuits
• You're doing a full renovation and have walls and ceilings open anyway

A partial rewire replaces specific circuits or sections where there's a problem, leaving intact circuits that are still serviceable. This costs less but may only defer a full rewire if the rest of the installation is also ageing.

What Does a Rewire Involve?

A full rewire of a 3-bedroom house typically takes 5-10 days. The process:

• First fix: chasing new cable routes into walls, ceiling voids, and floors. The house will look like a building site.
• Second fix: sockets, switches, and light fittings fitted, consumer unit installed
• Testing: every circuit tested to BS 7671 before the power goes on
• Making good: plaster patching and decoration is usually left to the homeowner (or a plasterer you arrange)

How Much Does a Rewire Cost?

For a typical UK property:

• 1-bedroom flat: £2,500-£4,000
• 2-3 bedroom house: £4,000-£7,000
• 4-5 bedroom house: £7,000-£12,000+

These are rough figures. The actual cost depends heavily on the size of the property, the ease of cable routing, and whether the house is occupied during the work. Always get two or three detailed quotes before committing.

Can I Stay in the House?

Usually, but with disruption. Power will be off to sections of the house as circuits are replaced. Many homeowners choose to move out for the first-fix phase and return for the second fix, but it's not essential. We'll discuss what works best for you before we start.

Book a Rewire Assessment

RMP Electrical carry out rewires and rewire assessments across West London, Berkshire, and Buckinghamshire. If you're not sure whether your home needs a full or partial rewire, start with an EICR, which gives you a complete picture with no commitment to further work.