The short answer
Yes, you can sell a house that has been underpinned, and underpinned homes change hands across the UK every week. The sale tends to go more smoothly when you can show the work was done properly: a Certificate of Structural Adequacy from the engineer, building-control sign-off, guarantees or warranties for the work, and evidence that the property has been stable since. You will need to disclose the underpinning on the Property Information Form (TA6), and the buyer's solicitor, surveyor and mortgage lender will want to review the history. Some buyers are cautious and a few lenders are stricter, so it can take a little longer and the price may be affected — but a well-documented, stabilised, insurable underpinned house is a perfectly sellable property.
Owners of underpinned homes often fear the property is unsellable, which is rarely true. The sections below set out what makes an underpinned sale straightforward, the paperwork that reassures buyers and lenders, and the realistic challenges to plan for.
Selling essentials
- Can you sell?Yes
- Must disclose?Yes — on the TA6 form
- Key documentCertificate of Structural Adequacy
- Buyers checkSurvey, guarantees, insurance history
- Main hurdleCautious buyers / stricter lenders
What makes an underpinned sale go smoothly
Buyers and their advisers are not put off by underpinning itself so much as by uncertainty about it. The more you can demonstrate that the work was carried out correctly and the property has been stable since, the easier the sale. The documents that do the heavy lifting are:
- Certificate of Structural Adequacy: issued by the structural engineer on completion, confirming the underpinning was designed and built to remedy the movement.
- Building control completion certificate: showing the work was approved under the Building Regulations.
- Guarantees / warranties: any insurance-backed guarantee from the contractor, ideally transferable to the buyer.
- Insurance and claim records: evidence of how the original subsidence was resolved and that the home has been continuously insurable since.
Having this pack ready before you market the property prevents delays once a buyer's solicitor starts asking.
What buyers, surveyors and lenders look at
Three parties scrutinise an underpinned sale, each with a slightly different focus:
| Party | Main concern | What reassures them |
|---|---|---|
| Buyer's surveyor | Is it stable now? | No active movement; documented repair |
| Buyer's solicitor | Is it documented? | Certificate, building-control, guarantees |
| Mortgage lender | Is it lendable & insurable? | Stable history; available insurance |
| Insurer | Future risk | Cause removed; clean claims record |
Indicative summary of who reviews an underpinned sale and what reassures them.
Pricing and presenting the sale
How you price and present an underpinned home strongly influences how it sells. A few practical points:
- Get a realistic valuation: a local agent who has sold former-subsidence homes, and where helpful a RICS valuation, will give a figure grounded in your area rather than generic percentages.
- Lead with the documents: a tidy pack — certificate, building-control sign-off, guarantees, insurance history — turns a question mark into a reassuring story a buyer can verify.
- Finish cosmetic repairs: ensure any old crack repairs are properly made good and redecorated so the home presents as settled and cared-for.
- Be open from the first viewing: raising the underpinning yourself, with evidence to hand, builds trust and filters out buyers who would pull out later anyway.
Cash buyers and buyers using lenders comfortable with underpinning are your most likely purchasers, so an agent who understands that audience can target marketing accordingly rather than treating the home as a standard listing.
The realistic challenges
Selling an underpinned home is achievable, but it pays to be realistic about the friction. Some buyers will simply prefer a property with no movement history, which can narrow your pool. A minority of mortgage lenders are cautious about previously underpinned homes, so cash buyers and mainstream lenders who do lend on them matter. Insurance can sometimes be arranged most easily by passing your existing policy and claims history to the buyer, since the original insurer already knows the property. And the sale may take a little longer while the documentation is reviewed. None of these is a barrier to a sale; they are reasons to prepare the paperwork early, price sensibly, and be open from the first viewing. Honesty up front avoids a buyer pulling out late when the underpinning surfaces in searches and surveys.
Frequently asked questions
Is an underpinned house harder to sell?
It can take a little longer and may attract more cautious buyers, but well-documented underpinned homes sell regularly. The keys are full disclosure, a complete paperwork pack (certificate, building-control, guarantees), evidence of stability, and available buildings insurance. Pricing realistically also helps.
Do I need to fix anything before selling an underpinned house?
You do not need to redo sound underpinning, but you should ensure cosmetic crack repairs are done, the property presents well, and your documentation is in order. If there is any sign of ongoing movement, get it assessed first, as buyers and lenders will want confidence the structure is now stable.
Will I get less for an underpinned house?
Sometimes. The effect on value varies by location, market and how well the work is documented, and is often modest for a long-stable, fully evidenced property. A reputable local estate agent and, where helpful, a RICS valuation can give a realistic guide for your specific home.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific property. They are guidance, not a quotation.