Getting an offer accepted on a property feels like the hard part is done. Keys are almost in sight, plans start forming, and everything feels real. But anyone who’s been through it will tell you: that gap between offer accepted and exchange of contracts is where things can quietly unravel.
And in 2026, despite more digital conveyancing tools and faster communication, property sales are still falling through surprisingly often. So, what’s going on?
Let’s talk through the reasons and more importantly, what both buyers and sellers can do to keep things on track.
Problems found in the survey or searches
One of the biggest deal-breakers is still the survey. It’s the moment when the property stops being “a dream home” and becomes a list of risks and repair costs.
Maybe the roof needs major work sooner than expected. Maybe there’s damp, Japanese knotweed nearby, or structural movement that raises red flags. Searches might reveal flood risk, planning restrictions, or expensive issues with drainage or access rights.
None of these automatically mean the sale must cease. In many cases, buyers and sellers renegotiate the price or agree to fix certain issues. But emotionally, it can shift a buyer’s mindset. Once doubt creeps in, even small problems can start to feel like big reasons to walk away.
A growing trend in 2026 is buyers doing more “pre-offer due diligence”, including condition reports or basic surveys before committing. It costs a bit upfront, but it reduces nasty surprises later.
Mortgage changes and affordability shocks
Another common reason deals fall apart is financing.
Interest rates have been more stable than the early 2020s, but lenders are still cautious. Small changes in rates, stress testing, or employment checks can affect borrowing power. A buyer who was comfortably approved at the start of the process might suddenly find their mortgage offer reduced or withdrawn.
Even changes in personal circumstances, such as a new job, reduced hours, or increased debt, can affect affordability mid-transaction.
One often overlooked issue is valuation gaps: the lender values the property lower than the agreed price. That leaves the buyer needing a bigger deposit or renegotiating, and sometimes neither side can bridge the gap.
Complications in the chain
Property chains are still one of the most fragile parts of the system. One purchase can depend on five or six other transactions all completing on the same day.
That means one delay can trigger a domino effect. If one person has a mortgage issue, or there’s a broken link further down the chain the sale can go off course. Sometimes even a seller going on holiday at the wrong time and break the entire chain.
In practice, it only takes one party to lose patience or confidence for the whole chain to wobble.
Gazumping
Gazumping still happens, even if people don’t like to talk about it. It’s when a seller accepts a higher offer after already agreeing to sell to someone else, before contracts are exchanged.
It creates obvious frustration for buyers, but it’s still legal in England and Wales up to exchange.
Some buyers now try to reduce this risk by pushing for quicker exchange timelines or requesting that properties are taken off the market immediately after acceptance. Neither strategy guarantee security but it does mitigate the risk.
Hidden delays and “soft” deal-breakers
Not every fall-through is dramatic. Some are slow burns.
Sometimes transactions come to a grinding halt because of:
- slow conveyancing and communication delays
- issues with leasehold paperwork or missing management packs
- probate properties taking longer than expected
- anti-money laundering checks slowing things down
- buyers or sellers simply losing momentum or confidence
There’s also an emotional factor that often gets overlooked. The longer a transaction drags on, the more time people have to rethink. It’s always a big purchase and any amount of doubt can cause a buyer to get cold feet and pull out.
What buyers can do
If you have options, try to choose a property which is chain-free or has a short chain. These transactions are usually less risky. They’re simpler, faster, and less dependent on other people’s timelines.
Keep things moving as much as you can. That means getting your mortgage application underway immediately, responding quickly to your solicitor, and organising documents early. The faster you move, the less time there is for problems to build up.
It also helps to be realistic from the start. If a survey reveals issues, decide early whether you’re negotiating or walking away, rather than drifting in uncertainty.
What sellers can do
One of the best things you can do as a seller is prepare early. Instruct your conveyancer when you first list the property, not when you find a buyer. That way, key documents are ready and delays are reduced.
Providing a clear, complete information pack upfront (warranties, planning permissions, leasehold details if relevant) can also prevent last-minute surprises that derail a deal.
And if you’re open to it, being flexible on timing or small negotiations can often keep a deal alive if things get tense.
The bigger picture
Most fall-throughs aren’t caused by one big dramatic event; they’re usually the result of small uncertainties stacking up until someone decides it’s no longer worth the risk.
The smoother, faster, and more transparent the process is, the less room there is for doubt to creep in.
How can we help? We keep transactions moving at pace. We’re responsive and proactive and we deal with issues as and when they arise. This helps to reduce the risk of transactions falling through. If you’d like to instruct us to do your conveyancing, please get in touch.