# Signs your house needs rewiring

> The clearest signs your house needs rewiring are old rubber, lead or fabric-covered cable, an old fuse box with rewireable fuses and no RCD protection, scorch marks or warm sockets, and repeated tripping or flickering. The only reliable way to know is an EICR (typically £150 to £250 for a 2 to 3 bed house); a full rewire of a 3-bed house usually costs around £5,500 to £8,000.

Source: Kuote, Market Harborough trades (https://kuote.co.uk/market-harborough/guides/signs-your-house-needs-rewiring/). Updated 2026-11-11.

Most homeowners never think about their wiring until something odd happens: a socket that feels warm, lights that flicker, or an electrician on another job who pulls a face at the fuse box. This guide sets out the signs your house needs rewiring, which signs usually mean a smaller repair instead, and how to find out for sure without being talked into work you don't need.

The short version: a lot of "old" wiring is fine. Some isn't. An inspection by a registered electrician is the only way to tell the difference.

## The signs your house needs rewiring

### 1. Old types of cable

The strongest sign is the cable itself. If you can see any of these, for example in the loft, under the stairs or behind the consumer unit, get it inspected:

- **Rubber-insulated cable**, often in black or dark red, which goes brittle and crumbles with age
- **Lead-sheathed cable**, a grey metal outer cover
- **Fabric or cloth-covered flex** on fixed wiring
- Cables without an earth wire (just red and black, no bare or green-and-yellow earth)

Modern cable since the 1960s and 70s has been PVC-insulated, grey or white, with an earth. Be careful looking: don't touch, unclip or pull anything.

### 2. An old fuse box with no RCD

A wooden-backed fuse board, a cast-iron switch, or a panel with **rewireable fuses** (ceramic holders with fuse wire) suggests an installation that predates modern safety standards. The key question is whether you have **RCD protection**: a device with a "T" test button that cuts the power in a fraction of a second if current leaks to earth, for example through a person. If there's no RCD, that alone is worth fixing, and the installation behind an old board is often worth checking too.

### 3. Scorch marks, buzzing or a burning smell

Brown marks around sockets or switches, a fishy or hot-plastic smell, or a buzzing noise are signs of overheating at a connection. Stop using that socket and get it looked at quickly. This is often a single bad connection rather than a whole-house problem, but it needs an electrician either way.

### 4. Circuits tripping often

A circuit that trips repeatedly is doing its job and telling you something is wrong. It might be a faulty appliance (try unplugging things one by one), dampness, or deteriorating cable insulation. Don't keep resetting it and don't replace a fuse with a bigger one.

### 5. Flickering or dimming lights

Occasional dimming when a big appliance starts can be normal. Persistent flickering on one circuit, or lights dimming across the house, suggests loose connections or an overloaded circuit.

### 6. Not enough sockets, and extension leads everywhere

Older houses were wired for far fewer appliances. Daisy-chained extension leads and adaptors are a fire risk. This doesn't always need a rewire: often extra sockets or a new circuit will do. See [the cost of extra sockets](https://kuote.co.uk/market-harborough/prices/extra-sockets-cost-market-harborough/).

### 7. Round-pin sockets or light switches on skirting boards

Round-pin sockets, or sockets set into skirting boards, are a strong sign the wiring behind them is very old.

### 8. Electric shocks or tingles

Any shock or tingle from a switch, socket, appliance or tap is a warning. Turn off the circuit and call an electrician. If someone is hurt, call **999**.

### 9. It has never been inspected

If you don't know when the wiring was last tested, that's worth fixing. Common guidance for owner-occupied homes is an inspection roughly every 10 years and when you buy a house. Landlords in England must have one at least every five years (see our [EICR guide for landlords](https://kuote.co.uk/market-harborough/guides/eicr-guide-landlords-leicestershire/)).

### 10. You're about to renovate

If you're planning a kitchen, bathroom or major redecoration, now is the time to check. Rewiring after new plaster and decoration means doing that work twice. This is one of the most useful things we learned while renovating: the electrics should be decided before the plasterer arrives (see [the order of trades in a renovation](https://kuote.co.uk/market-harborough/guides/renovation-order-of-trades/)).

## Signs that usually don't mean a full rewire

- **One dead socket:** usually a loose connection or faulty socket.
- **An old consumer unit with otherwise sound PVC wiring:** often a [consumer unit replacement](https://kuote.co.uk/market-harborough/prices/consumer-unit-replacement-cost-market-harborough/) is enough.
- **Not enough sockets:** extra sockets or circuits.
- **One circuit tripping:** often an appliance fault.

A good electrician will tell you if a partial rewire, a new consumer unit or a few repairs would do the job.

## How to find out for sure: an EICR

An **Electrical Installation Condition Report (EICR)** is a full inspection and test of the wiring. The electrician records any problems with codes:

- **C1:** danger present, needs immediate action
- **C2:** potentially dangerous, needs urgent remedial work
- **FI:** further investigation needed
- **C3:** improvement recommended, not unsafe

A report with C1, C2 or FI items is "unsatisfactory". Lots of C3s on an old installation is often when people start thinking about a rewire. Typical prices are in our [EICR cost guide](https://kuote.co.uk/market-harborough/prices/eicr-cost-market-harborough/).

Ask for a registered electrician (see [how to check an electrician is registered](https://kuote.co.uk/market-harborough/guides/how-to-check-an-electrician-is-registered/)). A rewire is notifiable under Part P, so you'll want the right paperwork at the end.

## What does a rewire cost and how long does it take?

UK 2026 cost guides put a full rewire of a typical 3-bed house at around **£5,500 to £8,000**, with partial rewires from roughly **£2,000**. Most guides say a 3-bed takes about **5 to 10 working days**, longer if you're living in the house. Plastering and decorating afterwards are extra.

These are national ranges, not quotes. Your price depends on the size and age of the house, floor types, how many sockets and circuits you want, and access. Our [house rewire cost guide](https://kuote.co.uk/market-harborough/prices/house-rewire-cost-market-harborough/) goes into more detail, and if you'll be staying put during the work, read [rewiring a house while living in it](https://kuote.co.uk/market-harborough/guides/rewiring-an-occupied-house/).

## Getting it checked in Market Harborough

If any of these signs sound familiar, we can put you in touch with the electrician we used on our own renovation. We're not paid for recommendations. We just pass you to people we trust.

Message us on WhatsApp: https://kuote.co.uk/market-harborough/go/electrician

You can read more about [our electrician](https://kuote.co.uk/market-harborough/electricians/). If something is sparking, smoking or smells of burning now, see our [emergency electrician page](https://kuote.co.uk/market-harborough/emergency-electrician-market-harborough/). For a power cut, call **105**.

## Typical prices

| Job | Typical range | Notes |
|---|---|---|
| EICR, 2 to 3 bed house | £150–£250 per job | 2026 UK guides; a survey of firms put the 3-bed median around £200 |
| Full rewire, 3 bed house | £5,500–£8,000 per job | 2026 UK cost guides, excludes replastering and decorating |
| Partial rewire | £2,000–£6,000 per job | Depends heavily on how many circuits |

## Frequently asked questions

### How do I know if my house needs rewiring?

Look for old rubber, lead or fabric-covered cable, an old fuse box with rewireable fuses and no RCD, round-pin sockets, scorch marks, burning smells or frequent tripping. None of these alone proves a rewire is needed. The reliable answer comes from an EICR, where a registered electrician inspects and tests the installation and codes any faults.

### How often should a house be rewired?

There is no fixed date. Wiring doesn't expire, and PVC cable installed well can last for decades. What matters is its condition, which is why periodic inspection is recommended, often around every 10 years for owner-occupied homes and when you buy. Landlords in England must have an EICR at least every five years.

### Can I sell a house that needs rewiring?

Yes. There is no legal requirement to rewire before selling. A buyer's survey may flag old wiring, and the buyer may ask for an EICR or negotiate on price. Having an up-to-date report, and certificates for any recent electrical work, generally makes the sale smoother.

### Is old wiring dangerous?

Not automatically. Old PVC wiring can be perfectly safe. Rubber-insulated cable is more of a concern because the insulation goes brittle and can crumble, exposing live conductors. Missing RCD protection or earthing also raises the risk of shock and fire. An EICR tells you whether your specific installation is safe.

### How much does it cost to rewire a 3 bed house?

UK cost guides for 2026 typically put a full rewire of a 3-bed house at around £5,500 to £8,000, with partial rewires from about £2,000. Plastering and redecorating are usually extra. The exact price depends on your house and comes from the electrician's written quote after a survey.

## Sources

- [Less.co.uk: EICR prices 2026 survey](https://less.co.uk/blog/research/eicr-prices-2026)
- [Fantastic Services: House rewiring cost 2026](https://www.fantasticservices.com/cost-guides/electrical/house-rewiring/)
- [MyJobQuote: Rewiring a house cost](https://www.myjobquote.co.uk/costs/rewiring-a-house)
- [Housekeep: Cost to rewire a house 2026](https://housekeep.com/cost-guide/electrician/rewire-house/)
- [Planning Portal: Part P electrical safety](https://www.planningportal.co.uk/applications/building-control-applications/building-control/approved-documents/part-p-electrical-safety)
- [GOV.UK: Electrical safety standards in the private and social rented sectors](https://www.gov.uk/government/publications/electrical-safety-standards-in-the-private-and-social-rented-sectors-guidance)
- [Which? Trusted Traders: unregistered electrical work](https://trustedtraders.which.co.uk/articles/electrical-installation-regulations-don-t-get-left-with-unregistered-electrical-work/)