Do You Have to Declare Structural Problems When Selling a House?

Selling a house is already a lot of work, but it’s even more complicated when you’re selling a property with structural damage.

Here’s the good news: whether it’s subsidence, black mould, foundation issues or a leaky roof, you can still sell your house. But when it comes to the law in England and Wales, the answer is yes: these issues do have to be declared when you put your property up for sale.

Then comes the natural follow-up question: will declaring structural issues kill the sale? No, not if the property is sold to the right buyer.

Cash buyers who specialise in problem properties buy houses with structural issues all the time. There’s no nasty surprise at the survey stage because the survey isn’t the moment of truth; instead you’re simply upfront about the issues when you contact the specialist buyer.

Let’s take a closer look at how it all works.

What Counts as a Structural Problem?

Structural problems are anything that can affect the integrity, safety, or long-term stability of the building. They’re different from cosmetic issues, which a buyer can usually fix themselves.

Subsidence sits at the top of the list because it’s the one lenders care about most, but structural issues can also be cracks wider than 3mm running diagonally through brickwork, doors and windows that no longer close properly, or gaps appearing between walls and skirting boards. Heave and landslip fall into the same category and trigger the same lender response.

Roof and water damage

Slipped tiles, sagging ridgelines, evidence of long-term water ingress into the loft. A new roof costs anywhere from £5,000 to £15,000 depending on the property, which is exactly why mortgage valuers flag it.

Damp

This is the most nuanced category. Rising damp, penetrating damp, and condensation all have different causes and remedies. A meter reading above 18% in a structural wall will appear in any homebuyer’s survey, and the buyer’s solicitor will ask about it.

Everything else that behaves like a structural issue

Some defects aren’t strictly structural but affect mortgage lending the same way: Japanese knotweed within seven metres of the property, asbestos in older builds, cavity wall tie failure, timber decay (including dry rot and woodworm.) All of these need disclosing.

What Does the Law Actually Require?

The legal position in England and Wales sits across three overlapping frameworks.

The Misrepresentation Act 1967 makes it unlawful to induce a buyer into a contract with a false statement. The Consumer Protection from Unfair Trading Regulations 2008 require honesty about anything material to the buyer’s decision. Caveat emptor, the old principle of “buyer beware”, still technically applies but has been heavily curtailed by both statutes.

The practical mechanism for disclosure is the TA6 Property Information Form, published by the Law Society and used in virtually every residential transaction.

Section 4 asks directly about structural movement, alterations, repairs, and known defects. Section 7 asks about flooding, which often correlates with structural problems. The answers must come from the seller, not the agent, and the seller signs to confirm their accuracy.

Three things worth being clear on:

Sellers are not required to commission a survey or actively investigate problems they don’t know about. The duty is to disclose known facts, not discover new ones.

“I don’t know” is a legitimate answer, but only if it’s genuinely true. Deliberate evasion, however, can still constitute misrepresentation.

The duty applies whether selling through an estate agent, at auction, or directly to a cash buyer.

Getting it wrong is serious

A buyer who discovers undisclosed structural problems after completion can sue for damages or, in extreme cases, rescission of the sale. Claims must typically be brought within six years, extending to twelve in cases of fraud. Some sellers face criminal prosecution under the CPRs.

Will Declaring a Structural Problem Stop the Sale?

On the traditional high-street market, structural problems can often impede a sale. Families don’t want to move into a property that might lose its value as time goes on; nor do they want to invest thousands of pounds in serious repairs.

More importantly, mortgage lenders are conservative by default and become even more so when a survey flags things like subsidence, knotweed, or significant damp. If the buyer’s offer was conditional on a mortgage offer – which is almost always the case – the lender’s reaction usually determines whether the sale survives, and more often than not the sale will fall through.

Even when the lender holds, the buyer typically renegotiates. A 10 to 20 percent reduction is common, sometimes more depending on the issue. Repair quotes get exchanged, surveyors get re-instructed, and months pass.

Cash Buyers Change the Equation Completely

This is why your safest bet is selling to a specialist cash buyer: there’s no lender to satisfy, no mortgage valuation to fail, no last-minute renegotiation when the survey comes back. The structural issue gets priced into the offer from day one, and the offer holds.

Companies like Sell House Fast buy properties with structural problems as a routine part of what they do, and sales can close in days. The seller declares the issue, the cash buyer proposes an offer, and completion follows on the seller’s preferred timeline.

This is the part most sellers don’t realise until they’ve already wasted three months trying to sell conventionally. Structural problems don’t prevent a sale, they just tend to prevent a mortgaged sale.

What Happens If You Don’t Declare Structural Issues?

Three things can happen here, usually in this order.

The survey finds it anyway

Surveyors are trained to spot exactly the kinds of issues sellers hope will stay hidden. The homebuyer’s report will flag them in writing, and a traditional mortgage-based sale collapses or gets renegotiated.

The buyer sues after completion

Even if the survey misses it, the buyer has legal recourse once they move in and discover the problem. Section 2 of the Misrepresentation Act 1967 allows a buyer to claim damages where they relied on a false statement. Damages typically cover the cost of remedial work, sometimes with additional compensation for distress and inconvenience.

Active concealment escalates to criminal liability

In cases where the seller painted over damp patches, hid crack monitors, or removed knotweed from sight without treating the root system, the buyer can pursue a claim in fraud or seek prosecution under the CPRs. Penalties include unlimited fines and, in the most serious cases, imprisonment.

Honesty is the path of least resistance. It also opens the door to the kind of buyer who actually wants the property regardless, aka a specialist cash buyer.

The Bottom Line

When it comes to the legal side of things, structural problems must be declared in England and Wales. That’s the law, and there’s no way around it.

What changes is who buys the property after the declaration, and how quickly. The high street market punishes honesty about defects, while specialist cash buyers reward it with certainty and cash that other buyers can’t match.

If a structural issue is keeping a sale stuck, the issue probably isn’t the issue – it’s the type of buyer you’re looking for.

FAQs

Do I have to commission a survey before selling?

No. Sellers in England and Wales have no obligation to investigate the property’s condition. The duty is to disclose what is already known, not to uncover new problems.

Does subsidence have to be declared even if it’s historical?

Yes. Past subsidence and any related insurance claims must be disclosed on the TA6, even if remedial work has been completed and the property has been stable for years.

Can I sell a house with active Japanese knotweed?

Yes, though most mortgage lenders refuse to lend on properties with knotweed within seven metres unless there’s a treatment plan in place. Cash buyers will typically buy regardless.

What happens if a buyer’s survey finds something I didn’t know about?

There’s no liability for genuinely unknown defects. The buyer can renegotiate or withdraw, but legal claims against the seller require evidence the issue was known and undisclosed.

How is “structural” defined for survey purposes?

Anything affecting the load-bearing elements of the building, the roof, foundations, external walls, or significant timber elements. Cosmetic and minor maintenance issues don’t qualify.

Will declaring damp affect my asking price?

On the open market, often yes, depending on the severity. Cash buyers price the issue into their offer from the start, removing the renegotiation risk.

Can a buyer sue me years after completion?

Yes. Misrepresentation claims can be brought within six years of completion under the Limitation Act 1980, extending to twelve years for fraud or deliberate concealment.