Cracks in the wall. Doors that won’t close. A surveyor’s report that mentions ground movement. If any of that sounds familiar, you’ve probably got a subsidence problem.
I’m Saif Derzi, founder of Property Buyers Today. I’ve been buying tricky houses across the UK since 2015. Subsidence ones are some of the trickiest.
This guide walks you through your real options, the legal stuff you can’t skip, and the maths on whether to repair or sell as-is.
- Selling Options for Properties with Subsidence
- Understanding Subsidence and Its Impact on Property Sales
- Your Legal Obligations When Selling Property with Subsidence
- Getting Professional Subsidence Assessment and Valuation
- Repair vs Sell As-Is: Making the Right Financial Decision
- Managing Buyer Concerns and Mortgage Challenges
- Useful Resources
- Why Choose Property Buyers Today for Your Subsidence Property
Selling Options for Properties with Subsidence
Estate Agents
The traditional route faces real problems with subsidence properties:
- Average sale time: 12-18 months (longer than standard sales due to subsidence disclosure and buyer hesitation)
- 2 in 3 sales fall through (much higher than the standard rate)
- Success depends on finding specialist buyers and lenders willing to approve
You’ll face several costs:
- Commission fees (up to 3%)
- Conveyancing fees (up to £4,000)
- Structural surveys and monitoring reports (£1,500-£5,000)
- Specialist insurance arrangements
- Legal documentation for subsidence history
Best route if your house is fully repaired, fully documented, and you can wait. Pick an agent who’s actually sold a subsidence property before. Most haven’t.
Property Buyers Today
When you need certainty with subsidence issues:
- Completion in as little as 7 days
- No mortgage complications or lengthy approval processes
Clear benefits:
- No estate agent fees
- Legal fees covered
- No viewings – we buy subsidence properties as-is
- No structural repairs required
- Guaranteed completion date
Trade-off: Expect around 80-85% of the reduced market value. The full maths is in the next section so you can see exactly what that means in pounds.
Experienced cash house buyers like Property Buyers Today understand subsidence and won’t flinch at structural reports.
Property Auction
Going under the hammer attracts specialist buyers:
- Timeline: 3-4 months
- Exchange happens immediately when the hammer falls
Key considerations:
- Property sold as-is – no repair requirements
- Attracts developers and renovation specialists familiar with subsidence
- Risk of selling under market value due to subsidence stigma
- Allow 4-8 weeks until auction day
- Allow 28 days to complete purchase
- Entry fees apply (up to £1,000)
- Auction house commission (up to 6%)
- Specialised knowledge of the subsidence market is helpful
Learn more about selling a house at auction to understand if this route suits your subsidence property. suits your subsidence property.
Understanding Subsidence and Its Impact on Property Sales
Subsidence is when the ground under your house sinks. The foundations shift. Walls crack. Doors stop fitting their frames.
The usual signs:
- Cracks wider than a £1 coin, often diagonal
- Cracks that grow over weeks or months
- Doors and windows that suddenly stick
- Floors that feel sloped or uneven
- Wallpaper rippling at the corners
Most UK subsidence comes down to four causes. Clay soil that shrinks in dry summers. Thirsty trees too close to the house, especially oak, willow, ash, and poplar. Leaking drains washing soil away under the foundations. Old mining works underneath certain regions of the country.
The hit to your sale price is real. Historic subsidence that’s been fixed knocks 10-20% off market value. Active, ongoing subsidence knocks 20-30% off, and your buyer pool shrinks to cash investors only.
Your Legal Obligations When Selling Property with Subsidence
Hide subsidence and you’ll get sued. Simple as that.
The law is clear here. You have to tell buyers about ground movement, cracks, and any past insurance claims. Even if you fixed it ten years ago.
The TA6 form is where most sellers trip up
The TA6 is the legal document you fill in for any house sale. Your solicitor sends it to the buyer’s solicitor.
Section 5 asks about building works. Section 6 asks about insurance claims. Both matter for subsidence.
You have to mention underpinning, repair work, structural reports, and any insurance claims. Yes, even refused claims. Yes, even claims from a previous owner if you know about them.
Lie on this form and the buyer can sue you after they move in. They can claim back the difference in value, plus legal costs. I’ve seen people lose £40,000 this way.
You can download a copy of the TA6 form from the Law Society to see exactly what gets asked.
Consumer Protection Regulations (CPRs)
These rules cover everything you say about your house. Estate agent listings. Conversations at viewings. Emails to the buyer.
You can’t hide a fact that would change the buyer’s mind. Subsidence definitely counts.
Break the CPRs and you face fines, court action, and damages. Trading Standards can also get involved.
Insurance claim history
Insurance companies share data. They have a database called the Claims and Underwriting Exchange (CUE). Any buyer’s insurer can pull your full claims history.
So if you’ve claimed for subsidence before, the buyer’s insurer will know within minutes of running a quote. Better they hear it from you first.
Keep records of every claim. Approved, refused, withdrawn, ongoing. All of it.
Structural engineer reports
If you’ve ever had a structural engineer look at the property, you have to share the report. Even if it said the house was fine. Even if it’s ten years old.
Hiding a report is one of the fastest ways to get sued. Buyers’ solicitors specifically ask about this now.
If the report is old, the buyer might want a fresh one. That’s fair. The market changes, soil conditions change, and a 2015 report doesn’t tell anyone what’s happening in 2026.
Mortgage lenders need to know
Most banks won’t lend on a house with active subsidence. Some won’t even lend on houses with historic subsidence that’s been signed off.
If your buyer is getting a mortgage, their lender will find out. They always do. The valuation surveyor flags it, or the buyer’s solicitor flags it from the TA6.
Be upfront with the buyer from day one. Otherwise their mortgage falls through at week 8 and you’re back to square one.
Council enforcement notices
If the council has issued any notice about your property, that has to be disclosed too. Building control, dangerous structure notices, anything.
Sometimes subsidence affects neighbouring houses. The council can step in. This gets complicated fast and often delays sales by months.
Getting Professional Subsidence Assessment and Valuation
Getting the right expert help is important for subsidence problems.
I’ve worked with many people who hired the wrong person first. This wastes time and money when you’re already worried. But knowing who does what saves you from making mistakes.
A structural engineer checks if your house is safe.
Building surveyors look at general house problems. Structural engineers focus on serious foundation issues.
Your insurance company will send its own person. They decide if you need work to fix the foundations.
Active subsidence needs watching for months or years.
Getting a professional house valuation shows how much your house is really worth. Many sellers are surprised by how much the value drops.
Banks often won’t lend money for subsidence houses. Even with repairs, some banks say no to buyers.
Key people you need:
- Structural engineer – checks building safety
- Insurance surveyor – decides on repair work
- RICS valuer – gives accurate price assessment
Repair vs Sell As-Is: Making the Right Financial Decision
This is the biggest decision you’ll make. Get it wrong and you lose tens of thousands.
There’s no universal right answer. It depends on the cause, the cost, your timeline, and your stress tolerance.
Underpinning Costs and Timeline Considerations
Underpinning your house costs a lot of money and takes ages.
Most underpinning jobs cost between £15,000 and £50,000. Big houses or bad subsidence can cost even more. The work can take 3 to 6 months to finish completely.
You might need to move out while work happens. This costs extra money for somewhere else to live.
Building work is messy and noisy too.
Getting quotes from different builders helps you understand real costs. Some builders specialize in subsidence work and know what they’re doing.
Insurance Coverage for Subsidence Repairs
Insurance might pay for subsidence repairs, but not necessarily for everything.
Most home insurance covers subsidence damage and repair costs. But they often won’t pay the first £1,000 or more. Some policies have much higher amounts you pay first.
Insurance companies choose which builders to use. You might not get to pick who does the work.
They also decide what type of repairs to do.
Some insurance won’t cover certain types of subsidence. Tree root damage might not be covered if you planted the trees yourself.
The 12-month monitoring period
Here’s what nobody tells you upfront. Before insurance approves any underpinning, they want a full year of monitoring first.
They put markers on the walls. They measure movement every few months. They want to know if the ground is still moving.
You can’t sell easily during this year. Most buyers will walk. Most lenders will refuse to fund a purchase while monitoring is active.
If movement stops during monitoring, you might get away with smaller repairs. Resin injection, drain fixes, tree management. That’s a good outcome.
But you still wait the full 12 months. No shortcuts.
What repaired subsidence does to your value
Even with perfect repairs and full paperwork, your house is worth less than the one next door without a subsidence history.
Industry-standard hit is 10% to 20%, and that gap can stick around for a decade.
Some buyers actually like a fixed subsidence house. They figure the problem is sorted, the foundations are now stronger than the neighbour’s, and they get a discount. Those buyers exist, but they’re rare.
You’ll need:
- Certificate of Structural Adequacy from the engineer
- Building Control completion certificate
- Insurance-backed guarantee (10 to 20 years usually)
- Monitoring reports showing no further movement
Without these, expect a much bigger discount. Or no buyer at all.
Ongoing maintenance after repairs
Repaired isn’t the same as forgotten. The guarantee usually requires annual checks. Miss them and the guarantee dies.
Trees become a permanent job. You’ll need to manage them every year. Sometimes that means cutting them back. Sometimes it means taking them out.
Insurance premiums stay higher. Often by 30% to 50%. Some insurers won’t quote at all.
Doing the maths
Let’s run the numbers on a £300,000 house with subsidence.
Sell now to a cash buyer: Subsidence drops the value to around £240,000. We pay 80-85% of that. You get £192,000 to £204,000 in 7 days.
Repair first, then sell: Wait 18 months. Spend £30,000 on the work. House sells for around £255,000. After agent fees, surveys, and 18 months of mortgage payments and stress, you walk away with roughly £215,000.
Auction: Sell as-is in 10 weeks. Hammer price around £190,000. After fees, you get roughly £180,000.
Repairing earns you about £15,000 to £20,000 more than a cash sale. But you wait 18 months and manage the whole process yourself.
If you’ve got time, patience, and cash to front the repairs, repair wins. If you need out fast, cash sale wins. If you want speed without the lowest price, auction sits in the middle.
Think hard before you commit to a year of insurance phone calls.
Managing Buyer Concerns and Mortgage Challenges
Even with a fixed and signed-off house, your buyer faces problems.
Mortgages are the biggest hurdle. Most high street banks won’t lend on subsidence properties. Halifax, Nationwide, Santander, the lot. Your buyer pool drops by 60-70% straight away. Specialist lenders exist but charge higher rates.
Insurance costs jump. Your buyer might pay double the normal premium with a £2,500 subsidence excess. Some insurers refuse to quote at all.
Transfer your insurance claim if you can. If your subsidence is being handled under a live claim, ask your insurer in writing if you can pass it to the buyer. The repair gets paid for, the buyer takes on less risk, and your sale price can jump by £20,000 or more.
Get every document ready before you list. Building Control completion certificate. Certificate of Structural Adequacy. Insurance-backed guarantee. Monitoring reports. Missing one piece of paper kills sales at exchange. There are plenty of other things that can hold up exchange of contracts, so don’t add to the list.
Expect the timeline to stretch. A normal sale takes 12 weeks from offer to completion. Add 3 to 6 months for a subsidence sale. Extra surveys, extra lender questions, extra solicitor enquiries.
Buyers will walk. Most viewings won’t turn into offers. Most offers won’t reach completion. That’s the market. Don’t take it personally.
If that timeline doesn’t work for you, auction or cash sale is where to look.
Useful Resources
A few trusted places to get more help with subsidence, paperwork, and disputes. All free to use.
- Law Society – Find a property solicitor and download a copy of the TA6 form so you know exactly what you’ll be asked to disclose.
- Institution of Structural Engineers – Find a qualified local structural engineer to assess movement and write a report you can show to buyers.
- Financial Ombudsman Service – Free service for handling complaints about UK insurers if your subsidence claim is refused or delayed.
- Association of British Insurers – Industry guidance on subsidence cover, claims, and which insurers will quote on properties with movement history.
- Citizens Advice – Free, independent help on housing law, contracts, and disputes with builders, insurers, or solicitors.
- gov.uk Building Regulations approval – Official guidance on completion certificates, building control sign-off, and what paperwork you legally need after structural work.
If you’ve had a bad experience with an estate agent, the Property Ombudsman handles those complaints separately.
Why Choose Property Buyers Today for Your Subsidence Property
I get it…
Selling a house with subsidence is a minefield.
It’s very hard to know all the legal jargon and decide if it’s worth trying to fix it before selling.
It can be a very stressful time.
So that’s where we come in. We will talk you through the whole process, and we can have money in your bank within a week.
Here are some other reasons why people choose to sell to us…
Speed
Most house sales take months, but we can buy your property in as little as 7 days.
This quick process is perfect if you need to move soon or want to avoid being stuck in a long chain of buyers and sellers. We have the cash on hand so don’t need to wait for mortgages or a chain to collapse.
Guaranteed Sale
Did you know 1 in 3 sales fall through on the open market?
We know how frustrating it is to get 6 months into a process and have a buyer pull out.
When we give you the final price for your house, that’s the amount you’ll get. Guaranteed!
No Costs
You won’t face any costs with us.
We handle all the expenses involved in buying your property, including legal fees and surveys. You get cash in your bank when the sale is complete, and there are no surprise estate agent commissions to worry about.
No Stress Or Hassle
We handle the heavy lifting from start to finish. You get one point of contact, regular updates, and straight answers to your questions. No chasing solicitors. No wondering what’s happening. You’ll always know where the sale is and what’s coming next.
Free Property Valuation
We value your house properly and we don’t charge for it. Our team looks at the property, checks recent local sales, and factors in the subsidence properly. You get an honest figure based on what the market actually pays. No obligation, no pressure, no follow-up sales calls if you decide it’s not for you.
No Viewings Required
Forget the cleaning, the tidying, and the strangers in your kitchen. We buy your house off one assessment. No open houses. No back-to-back viewings every Saturday. No nosy neighbours pretending to be interested. Your daily life carries on as normal while the sale goes through.
All Properties Welcome
Whether your house needs work or is in perfect condition, we’ll buy it.
We have experience with all types of properties and conditions. This means you can sell your house to us no matter what state it’s in.
Professional Legal Service
Our expert team manages all the legal requirements for you.
We work with experienced property lawyers who make sure everything runs smoothly, and put your property at the top of their list. This gives you peace of mind that your sale is being handled properly from start to finish.
