UK property fall-through statistics: how many sales collapse, and what it costs
Jag Singh
Co-founder, KeyWise
A UK property sale collapses every two minutes - and the buyer who loses it is, on average, £3,337 out of pocket. Around 300,000 agreed sales fall through every year in the UK: roughly one in four. Most collapse after a survey or legal check uncovers a problem that was, more often than not, visible long before the offer was made. This report pulls together the most reliable UK data on how often deals fail, what that costs buyers, brokers and estate agents, and the repair costs buyers routinely miss in a 15-minute viewing.
Key findings at a glance
- A property sale collapses every 2 minutes in the UK. (TwentyEA)
- ~300,000 agreed sales fall through every year - around 1 in 4 (25–30%). (Industry data)
- £3,337 - the average amount a home mover loses when a sale collapses, in aborted survey, legal and mortgage fees. (House Buyer Bureau)
- 6 months - the typical time a buyer loses on a failed purchase. (Industry data)
- £1 billion+ - what UK buyers spend each year on transactions that never complete. (Industry data)
- £270 million - the estimated annual cost of collapsed sales to the UK. (Ministry of Housing / The Times)
- £1.27 billion - estimated annual loss to estate agents from collapsed deals. (Industry data)
- £100 million+ - estimated broker time and commission wasted on collapsed deals each year. (Industry estimate)
- £5,000–£15,000 - what new homeowners typically spend on immediate works after moving in, much of it spottable at the viewing. (Industry data)
How many UK house sales fall through?
Of the roughly 1.2 million properties bought and sold in the UK each year, around 300,000 agreed sales collapse before completion - between a quarter and a third of all transactions. Put another way, a sale falls through somewhere in the UK every two minutes.
A "fall-through" is a sale that has been agreed - an offer accepted, the property marked sold subject to contract - but then collapses before contracts exchange. In England and Wales, either side can walk away at any point before exchange with no legal penalty, which is why so many agreed deals never complete.
| Metric | Figure | Source |
|---|---|---|
| UK property transactions per year | ~1.2 million | Industry data |
| Agreed sales that fall through | ~300,000 / year | Industry data |
| Fall-through rate | 25–30% (≈1 in 4) | Industry data |
| Frequency | One every ~2 minutes | TwentyEA |
What a collapsed sale costs the buyer
When a purchase falls through, the buyer rarely gets back what they've already spent. Survey fees, legal and conveyancing costs, and mortgage application fees are mostly non-refundable once the work is done.
- £3,337 is the average a home mover loses to a collapsed sale (House Buyer Bureau).
- Six months is the typical amount of time lost - the search, the offer, the conveyancing, all to be started again.
- Across the market, UK buyers spend over £1 billion a year on transactions that never complete.
The financial hit is only part of it. A failed purchase often means losing a property the buyer had emotionally committed to, and re-entering a market that may have moved against them.
What it costs the rest of the chain
Fall-throughs don't only hurt buyers. They ripple through everyone whose income depends on completion.
- Estate agents lose an estimated £1.27 billion a year to collapsed deals - work done, no fee earned.
- Mortgage brokers lose an estimated £100 million+ annually in wasted time and commission, because a broker is only paid when the deal completes. A collapse late in the process can mean weeks of work for nothing.
- The cost to the UK as a whole is estimated at £270 million a year (Ministry of Housing / The Times).
This is why fall-throughs matter commercially, not just emotionally - and why moving risk discovery earlier in the chain benefits buyers, brokers and agents alike.
The hidden cost buyers miss at the viewing
Here's the part most fall-through coverage overlooks. The issues that collapse a sale at survey stage are usually not hidden - they're visible at the viewing. They simply aren't on anyone's checklist, so they surface weeks later, after the offer, when it's expensive to act.
New homeowners typically spend £5,000–£15,000 on immediate works after moving in, and larger missed issues - roofing, rewiring, damp - commonly run to £10,000–£25,000 or more. The table below sets out indicative UK repair costs for the issues most often discovered too late, benchmarked by KeyWise's in-house quantity surveyor.
Indicative UK repair costs (2026)
| Issue | Typical cost range |
|---|---|
| New boiler | £2,000 – £4,000 |
| Full rewire (3-bed house) | £4,000 – £9,000 |
| Damp treatment (rising damp) | £1,500 – £5,000 |
| Roof repair (partial) | £500 – £3,000 |
| New roof (3-bed semi) | £5,000 – £14,000 |
| New windows (whole house) | £5,000 – £15,000 |
| Loft insulation (top-up) | £300 – £1,500 |
| Underpinning (subsidence) | £10,000 – £50,000+ |
Indicative ranges for guidance only - get site-specific quotes before adjusting any offer.
Why this keeps happening
The structure of the UK buying process puts the costs before the knowledge. A buyer commits - emotionally, then financially - on the basis of a short viewing and an asking price. The survey, which is where real condition risk is finally assessed, only happens after the offer is accepted, often weeks later and after legal costs have started.
In other words: financial commitment precedes risk discovery. By the time a buyer learns what they're really buying, they've already offered, instructed solicitors, and grown attached. That's the moment a deal either collapses or completes at a price that didn't account for the problems.
The fix isn't a better survey. It's moving the intelligence buyers need to before the offer - to the viewing itself, when there's still room to question the price or walk away cheaply.
How buyers can reduce the risk
- Use a structured viewing process, not memory. Most buyers rely on a 15-minute impression; a checklist captures what actually matters. See our house viewing checklist for UK buyers.
- Price in visible issues before you offer, so the survey confirms what you already knew rather than arriving as a shock. See what to check before making an offer.
- Know your options if a survey does flag problems - you can renegotiate professionally rather than panic. See how to negotiate house price after a survey.
Methodology & sources
This report aggregates published UK industry data with KeyWise's own quantity-surveyor cost benchmarking. Figures are presented as ranges or rounded totals because market conditions cause annual variation.
- Transaction and fall-through volumes (~1.2m transactions; ~300,000 fall-throughs; 25–30% rate): UK industry data, including Quick Move Now's Fall-Through Report and TwentyEA / TwentyCi market data.
- "A sale collapses every 2 minutes": TwentyEA.
- £3,337 average loss per collapsed sale: House Buyer Bureau, covering aborted survey, legal and mortgage application fees; widely cited by the HomeOwners Alliance.
- £270 million annual cost of collapsed sales: Ministry of Housing data, as reported by The Times.
- £1.27 billion estate-agent loss; £100m+ broker cost; £1bn+ buyer spend on failed deals: UK industry data and estimates.
- Repair-cost ranges: benchmarked by KeyWise's in-house quantity surveyor against published trade pricing and merchant data. Indicative only.
- Public property data referenced by KeyWise reports (property age, EPC, flood risk, planning history) comes from HM Land Registry, the EPC Register, the Environment Agency and local planning portals.
Journalists: you're welcome to cite this data with a link to this page. For comment or the underlying figures, contact hello@getkeywise.com.