Rewiring a house is disruptive and not cheap, typically around £6,500 for an average three bedroom home according to MyJobQuote’s rewiring cost guide, so it is worth knowing the difference between a genuine warning sign and something that just looks worrying but is actually a smaller, cheaper fix. Here is what to actually look for, and what an EICR (Electrical Installation Condition Report) tells you that guesswork cannot.
Warning signs that point toward a rewire
- Round pin sockets, or a mix of old and new socket styles. If you still have round pin sockets anywhere in the house, the wiring behind them almost certainly predates current safety standards.
- A fusebox with a wooden back, or rewireable fuses (as opposed to a modern consumer unit with RCD protection and circuit breakers). This is one of the strongest indicators of old wiring throughout the property.
- Frequent tripping or blown fuses, especially if it has got worse over time rather than being tied to one specific appliance.
- Burning smells, scorch marks around sockets or switches, or sockets that are warm to the touch. These are not “keep an eye on it” signs, they need a look promptly.
- Flickering lights that are not explained by a loose bulb, particularly if it happens across multiple rooms or worsens when other appliances are running.
- Wiring you know is old. If you know your home has not been rewired in the last 25 to 30 years, and you have no paperwork confirming otherwise, it is worth having checked even without obvious symptoms.
What is not necessarily a rewire
A single socket that has stopped working, one light that flickers and nothing else, or a fuse that blew once during a storm are all things worth getting looked at, but none of them alone means the whole house needs rewiring. A qualified electrician can trace a single fault without pulling the whole property apart, and it is a much smaller job.
Get an EICR before you decide anything
An Electrical Installation Condition Report is a formal inspection that grades any issues it finds by severity, from immediate danger through to improvement recommended. It is the single best way to move from “I think something might be wrong” to an actual, evidenced answer, and it often costs a fraction of what a full rewire does. Many homeowners commission one expecting the worst and come away with a short list of minor fixes instead.
If you are buying a property, especially anything built or last rewired before the 1990s, getting an EICR done before you complete is one of the more useful pieces of due diligence you can do, alongside the standard structural survey.
What a rewire actually involves
A full rewire replaces the cabling throughout the property, upgrades the consumer unit to modern standards with RCD protection, and typically adds sockets and circuits to match how a home is actually used today, more sockets in kitchens for appliances, dedicated circuits for things like electric showers, and provision for things like EV chargers if relevant. It is disruptive, since it usually means lifting floorboards and chasing into walls, but it is a one time job that should not need repeating for decades.
Always confirm the electrician doing the work is registered with NICEIC or NAPIT, or otherwise a member of a recognised competent person scheme, since this is how the work gets certified without a separate council building control inspection. We check exactly this when researching our Top 5 lists for every town, so a page for your area is a fast way to find electricians who already meet that bar.
Frequently asked questions
How do I know if my house needs rewiring?
The clearest signal is an Electrical Installation Condition Report (EICR) from a registered electrician, which grades your wiring and flags anything unsafe. Alongside that, warning signs like round pin sockets, a fusebox with a wooden back, frequent tripping, or wiring older than 25 to 30 years all point toward needing one.
How much does a full rewire cost?
A full rewire on an average three bedroom house costs around £6,500, according to MyJobQuote's rewiring cost guide, with the overall UK range running from about £2,500 up to £11,000 depending on the size of the property, how accessible the wiring is (a house with floorboards up is cheaper than one with solid floors and dot and dab walls), and how many sockets and circuits you are adding.
Can I get an EICR without committing to a rewire?
Yes, and it is the sensible first step. An EICR is a standalone inspection that tells you the condition of your wiring and grades any issues by severity. Many homeowners get one, find only a couple of minor faults, and never need a full rewire at all.
How long does a rewire take?
For an average occupied three bedroom house, a full rewire typically takes 5 to 10 working days, and the property is not usually liveable for at least part of that, since floorboards, walls and ceilings need to be opened up. Rewiring an empty property before you move in, or alongside other renovation work, is significantly less disruptive.
About the author
Stu Clark
Stu spent over 15 years in the trades, working as a plumber before running his own plumbing and bathroom renovation company with a team of eight. He founded Top5Trades to give homeowners the kind of shortlist and straight advice you would get from someone who has actually done the work. More about us →