Selling a House With Old Wiring: The 2026 UK Guide

By Lisa Hayes · 1 October 2026

Yes, you can sell a house with old or outdated wiring, and thousands of people do every year. You are not legally required to rewire first or to commission an electrical report, but you must answer the buyer's questions honestly, and a buyer's surveyor, lender or solicitor can turn dated electrics into a price cut or a stalled sale. The smart move is to find out what you actually have before anyone else does, then choose between a cheap fix, a rewire, or selling as it stands.

Does old wiring stop you selling a house?

No. It changes who your buyer is and how they behave. A mortgage buyer with a cautious valuer and a nervous solicitor is the buyer most likely to wobble. A cash buyer, an investor or a renovator will simply price the problem and carry on.

That is the whole story, really. Everything else in this guide is about managing the three places where wiring causes trouble: the survey, the legal paperwork, and the negotiation after the survey.

I have watched sellers lose weeks to this because they hoped nobody would look. Somebody always looks. A surveyor opens the consumer unit (the modern name for a fuse box) as a matter of routine, and an electrician quoted by the buyer will happily say "I'd rewire it" because that is what electricians do for a living.

How do you know if your wiring is old?

You do not need to be an electrician to spot the usual warning signs. Walk round with a torch and look for the following.

• A fuse box with ceramic fuse carriers or a wooden backing board. Rewirable fuses are a sign the installation predates modern protection.
• Round-pin sockets or sockets in dark brown Bakelite, which tell you the circuits behind them are probably ancient.
• Too few sockets and rooms full of extension leads and four-way adaptors.
• Fabric-covered or rubber-sheathed cable visible in lofts, under floors or in airing cupboards.
• A consumer unit that was installed years ago in a plastic casing rather than a metal one. Current wiring rules favour non-combustible enclosures, so a plastic board is often a candidate for replacement even where it still works.
• Sockets that are warm, discoloured, crackle or smell scorched. That is not an age issue, it is an urgent one. Stop using them and call a registered electrician.
• Lights that flicker or dim when an appliance starts.

None of these proves a rewire is needed. Together they tell you the survey is going to be interesting.

What does an EICR actually tell you?

An Electrical Installation Condition Report, or EICR, is a formal inspection and test of the fixed wiring in your home: the consumer unit, the cables, sockets, switches, earthing and bonding. It is carried out by a qualified electrician who tests the circuits and records what they find as a series of observation codes.

The outcome is binary: satisfactory or unsatisfactory. Any C1 or C2 makes the report unsatisfactory. C3s on their own do not.

For an owner-occupied home, an interval of up to ten years is commonly recommended between inspections. Industry guidance puts a typical domestic EICR at roughly £100 to £300, with the price moving by property size, number of circuits and access.

Are you legally required to have an EICR or rewire before selling?

If you live in the house and own it, no. There is no legal duty on a seller to produce an EICR, and no law that says old wiring must be replaced before a sale.

Landlords are different. Under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020, rented homes need a fixed-wiring inspection at intervals of no more than five years, remedial work within 28 days (or any shorter period the report specifies), and councils can fine for non-compliance up to £30,000 per offence. If you are selling a tenanted property in England, a current EICR is something your buyer's solicitor will reasonably expect to see. Our guide to selling a tenanted property covers the wider picture, and if the tenant is the tricky part, read selling with a sitting tenant as well.

The rules differ in Scotland and Northern Ireland, so this guide concentrates on England, with the principles applying broadly across the UK.

What is Part P and why do solicitors ask about it?

Part P of the Building Regulations covers electrical safety in dwellings in England. Since 1 January 2005, certain electrical work in a home has had to be either carried out by an electrician registered with a competent person scheme or inspected by building control. The work councils treat as notifiable includes installing a new circuit, replacing a consumer unit, and altering circuits in special locations such as bathrooms and shower rooms.

Done properly, the electrician certifies the job and you receive a certificate. That certificate is the paperwork your buyer's solicitor wants. Hammersmith and Fulham's building control team puts the consequence bluntly: being unable to prove that electrical work was lawfully certified can make any further sale of your property difficult.

The standard TA6 Property Information Form asks sellers about electrical work and the certificates that go with it, so the question will land on your desk whether you like it or not. If the form is new to you, our TA6 guide walks through it section by section.

The classic trap: the new consumer unit with no paperwork

Here is the scenario I see most often. Someone had a new fuse box fitted ten years ago, paid cash to a friend of a friend, and was never given a certificate. The board works perfectly. Nobody can prove it was done properly.

You have three realistic options. Ask the original installer to supply the missing certificate, which works if they were registered. Commission an EICR so a qualified electrician can inspect and test the installation and record its condition. Or, if the solicitor insists, take out indemnity insurance. Our guide to indemnity insurance when selling a house explains where it helps and where a buyer's lender will refuse it. For the general problem of missing sign-offs, see selling with no building regulations certificate.

My advice? The EICR is usually the cleanest route. It gives you a dated, professional document, and it shows the buyer what is actually there rather than what a lawyer fears might be.

What will a buyer's surveyor say about old wiring?

Surveyors are not electricians, and they say so in their reports. What they do is note visible signs of age, flag a dated consumer unit, and recommend that a qualified electrician inspects the installation before exchange. That one sentence in a survey is what starts the renegotiation.

If you want to see how the sequence plays out and what you can do about it, our guide on what happens if a survey finds problems covers the conversation. The short version is that a buyer with a written report from a qualified electrician is far easier to negotiate with than a buyer with a frightened feeling.

How much does fixing old wiring cost?

Costs vary with region, access, the age of the property and how much plasterwork needs making good. Typical 2026 ranges from a UK builder-booking platform are below. Treat them as ballpark, and get at least two written quotes.

Notice the gap between the first row and the last. A cheap report can save you from an expensive assumption. A buyer who has no information will often mentally price a full rewire at the top of the range, and then shave a bit more off "for the hassle".

Should you rewire before you sell?

Usually not. This is where I part company with the cautious advice you see elsewhere.

A full rewire is disruptive, dusty and messy. Floorboards come up, chases are cut into walls, and plaster needs repairing and repainting. You are spending several thousand pounds on a house you are about to leave, and buyers rarely pay pound for pound for that work. A rewire is rarely a profit centre. It is an insurance policy against a lower offer.

My rule of thumb: rewire first only if the house is otherwise in good order and sells to families who want to move straight in. If the property needs a new kitchen, bathroom and redecoration anyway, leave the wiring. A buyer who is stripping the place can do it more cheaply while the walls are open than you can while the carpets are down.

Replace the consumer unit if the existing one is the obvious problem. It is quick, it is relatively affordable, and it is the single item surveyors most often point at. Do it with a registered electrician and keep the certificate in a plastic wallet marked "for the solicitor".

What if you cannot afford to fix it?

Then you sell it as it stands and price it honestly. Plenty of homes sell this way, and our guide to selling a house as is covers the practicalities.

Two things matter. First, get the EICR anyway, because a buyer deciding on evidence behaves better than a buyer deciding on dread. Second, be realistic about who your buyers are. Some lenders and valuers are reluctant to lend on homes with obviously dated or unsafe electrics. Our guide on how to sell an unmortgageable house covers the fallback routes when lender pickiness becomes the obstacle.

What are your options for selling with old wiring?

If speed or certainty matters more than the last few thousand pounds, a cash buyer or investor removes the mortgage-valuation risk altogether. They price the wiring in and they do not need a lender's sign-off. The trade-off is the discount. Our guide to cash house buyers explains how the offers work, and selling a house fast covers the wider toolbox.

Why do electrical fires matter to a buyer?

Because they are not rare, and buyers know it. The IET, the professional body for engineers, reported in April 2026 that around 19,300 accidental domestic fires a year in England are linked to electricity, about 53% of all accidental house fires. The same survey found almost eight in ten adults (79%) feel confident about their home's electrical safety, while fewer than a third (30%) have had their electrics checked by a qualified electrician in over a decade.

• 53%of accidental house fires in England are electrical
• ~19,300electrical accidental fires a year
• 79%of adults feel confident about home electrics
• 30%checked by a qualified electrician in over a decade

That gap between confidence and checking is exactly what a seller can exploit, honestly. If you can hand over a recent EICR, you are one of the few sellers whose claims about their wiring are backed by paper.

What should you tell a buyer about the wiring?

Tell them what you know, plainly, and do not guess. If you do not know the age of the wiring, say you do not know. If the fuse box was replaced and you have the certificate, say so and hand it over. If it was replaced and you do not have one, say that too.

The danger is not an old installation. It is a confident statement that turns out to be wrong. If you tell a buyer the house was rewired in 2012 when it was not, you have given them a misrepresentation to point at, and no amount of charm will fix that. When you are unsure, answer "not known" on the property forms and get the report done. See our guide to what you must legally disclose and material information for the wider rules estate agents and sellers work to.

How do you sell a house with old wiring, step by step?

1. Do a quick walk-through. Look at the consumer unit, the sockets and any visible cabling in the loft or cupboard under the stairs. Note anything warm, scorched or flickering.
2. Find your paperwork. Look for any electrical certificates, previous EICRs, and records of when the consumer unit was changed. Check the loft and kitchen drawers.
3. Book an EICR with a registered electrician. Ask which scheme they belong to and whether they will quote for any remedial work separately.
4. Deal with C1 and C2 items. These make the report unsatisfactory, so fix them first. Get the electrician to issue a certificate for any notifiable work.
5. Decide on the bigger job. If the report recommends a rewire, compare two or three quotes against the price reduction a buyer is likely to ask for. Do the sums on paper.
6. Disclose accurately. Answer property-form questions with what you actually know and attach the report.
7. Price with the report in hand. If you are not rewiring, make sure your agent knows, and price accordingly rather than pretending.
8. Plan a fallback. If a mortgage buyer walks, you want a cash offer you can turn to quickly. Get a no-obligation comparison early rather than after the third collapse.

Common mistakes sellers make with old wiring

These are the five I see most, in rough order of expense.

• Hoping nobody looks. Surveyors look. Every time.
• Hiring an unregistered electrician because he's cheaper. The saving evaporates when your buyer's solicitor asks for the certificate you cannot produce.
• Rewiring just before sale and then repainting badly. Buyers notice patchy plaster. If you rewire, finish the job.
• Doing DIY electrical work. Notifiable work that you or a mate did on a Saturday afternoon is just the thing a solicitor is trained to ask about. The IET survey found 6% of adults had attempted rewiring themselves, which tells you how common the problem is.
• Taping over a fault and hoping. Not a fix, and a safety risk for whoever lives there next.

Do buyers' mortgage lenders refuse homes with old wiring?

Not as a blanket rule, and I would be wary of anyone who says otherwise. What happens in practice is that a valuer may note visible issues, and a lender may make its offer subject to an electrician's report or remedial works, particularly if the electrics look unsafe. The risk is higher for properties with obviously hazardous installations and for buyers on tight loan-to-value ratios.

That is why timing matters. If an EICR surfaces after the mortgage offer, you can end up with a retained sum or a re-valuation. If it is already in the pack when the buyer's surveyor arrives, there is little left to discover. Our guide to down-valuations explains what happens when a valuer comes in below the agreed price.

What if the house is inherited or you are selling for someone else?

Executors and attorneys often inherit a house whose electrics have not been touched for forty years. You are not expected to know the installation's history, and you can say so. What you should do is get the EICR, as the executor's solicitor will likely ask what condition the property is in. If you are dealing with probate, our guide to selling inherited property covers the rest, and if the home is run-down, a cash sale often removes the work altogether.

What about newer rules on wiring?

The IET and BSI published the latest amendment to the Wiring Regulations, BS 7671:2018+A4:2026, in 2026. It affects how electricians design and inspect installations, and it is also why you will see EICR codes applied against the current edition. You do not need to read it. You do need an electrician who works to the current rules, which is another reason to use someone registered with a competent person scheme.

Is it worth getting a valuation before you spend anything?

Yes, and it costs nothing. Before you commission any work, get a realistic view of what the house is worth in its current state and what a fixed-up version might fetch. Start with how much is my house worth and a free house valuation. If the gap between "as is" and "fixed" is smaller than the cost of the work, do not do the work.

Frequently asked questions

Can I sell a house with a fuse box instead of a consumer unit?

Yes. There is no law preventing it. Expect a surveyor to flag it and the buyer to ask for a reduction or an inspection. Replacing it costs roughly £550 to £1,500 depending on region and what else needs fixing.

Do I need an EICR to sell my house?

No, not if you own and live in it. Landlords in England must have one at least every five years. It is still a smart purchase for any seller with old electrics.

Is a failed EICR the end of the sale?

No. Unsatisfactory means there are C1 or C2 observations that need attention. Fix them, get the certificate, and the report becomes a selling tool.

How much does it cost to rewire a house in the UK?

Typical 2026 figures run from about £3,500 to £8,000 or more, before decorating and plaster repair. Get several written quotes.

Can a buyer pull out because of old wiring?

Until exchange of contracts, either side can withdraw. A buyer can use wiring as the reason, or as leverage to cut the price. Having an EICR in the pack removes most of that leverage.

Do cash buyers care about old wiring?

They factor it into the price rather than being stopped by it. That usually means a lower offer than an unaffected property would get, so compare more than one.

What is Part P?

The part of the Building Regulations in England that governs electrical safety in homes. Notifiable work, such as a new circuit or consumer unit, must be certified by a registered electrician or approved by building control.

What if I lost the certificate for work done years ago?

Ask the installer for a copy if they were registered. If not, an EICR from a qualified electrician is the usual answer, with indemnity insurance as a fallback if the buyer's solicitor accepts it.

The bottom line

Old wiring is a price conversation, not a roadblock. The sellers who get through it quickly are the ones who find out what they have, put it in writing, and decide what to do about it before the buyer's surveyor does it for them.

If you would rather skip the repairs, the paperwork and the nerves, you can see what cash buyers and investors would offer for the house as it stands. It costs nothing and there is no obligation to accept. Compare offers for your home here.