In this blog:
• Why do so many sales fall through after an offer is agreed?
• What are the most common causes of delays between offer and exchange?
• What does good progression actually look like?
• How does summer affect the risk of a sale stalling?
The moment an offer is agreed often feels like the hardest part is over. You have a buyer, a price is agreed, and what remains feels like paperwork and time. The instinct is to step back and let it run. That instinct is understandable, and it is exactly where a significant number of sales begin to go wrong. The period between offer agreed and exchange is where more transactions hit serious difficulty than at any other point. Delays build quietly, problems that could have been caught early are missed, and by the time an issue is visible it is often much harder to resolve than it would have been weeks earlier.
Why so many sales fall through after an offer is agreed
More agreed sales fail to reach completion than most sellers expect, and in London the pressure is, if anything, greater than the national picture. The reasons are rarely dramatic; they are gradual. A delay here, a missed response there, a survey issue not handled promptly, a buyer who starts to feel uncertain with no one keeping them engaged. The most common single cause is a problem found during the survey. Some are genuine dealbreakers; many more are manageable if handled quickly and explained clearly before the buyer has too long to dwell. The difference between a sale that proceeds and one that does not is almost always how promptly the issue is addressed, not how serious it is. Financing is another factor: if a transaction drags, a mortgage offer can expire or circumstances change. And chain issues compound everything, since a problem elsewhere in the chain can delay or end your sale if nobody is watching it.
What the gap between offer and exchange looks like now
Transactions take considerably longer than a few years ago, driven by greater legal complexity, tighter lender checks and stretched solicitor workloads. For leasehold properties the timeline is typically longer still, often by months, because of additional enquiries, management-company involvement and the volume of documentation. In areas like West Hampstead and South Hampstead, where many properties are leasehold flats, that is a practical reality sellers are often not prepared for. The longer a sale takes, the more time there is for something to change, and buyer confidence erodes slowly rather than dramatically.
What good progression actually looks like
An agent who monitors a sale tells you when something has happened. An agent who manages a sale works to make the right things happen in the right order and spots problems before they become news. The first leaves you reacting; the second keeps you in control. Good progression starts before solicitors are even instructed: understanding the buyer's full position, knowing who is in the chain and where the pressure points are, and having a clear sense of what needs to happen and when. From there it is regular contact with every party, not waiting to hear about a problem but checking in often enough to know whether things are on track. It also means staying close to the buyer, because one kept well informed is far less likely to get cold feet than one left in silence for three weeks.
Why summer makes this more important, not less
Summer adds a specific layer to the progression stage. Solicitors run with reduced teams in July and August, key contacts take leave, and Local Authority searches, already slow across much of London, can slow further. Chains that depend on several parties moving in step fall out of rhythm when two or three become harder to reach at once. Sales do complete in summer, many without difficulty, but the gap between an actively managed transaction and a passively watched one becomes more visible when the system around it is running at lower capacity. For sellers in West Hampstead, Brondesbury, Willesden Green and the wider North West London area agreeing sales now, that is worth understanding before the school holidays arrive.
What this means if you are thinking of selling now
Agreeing a sale is the start of the stage that decides whether the result holds. What happens between offer and exchange, who is watching it, how quickly problems are caught and how clearly the buyer is kept engaged, separates a clean completion from a frustrating one. At Paramount, the work after an offer is accepted is treated with the same care as the work that led to it: regular contact with solicitors and buyers, coming to sellers with a clear explanation and a proposed next step rather than just passing the problem along, and being honest when something is causing concern rather than waiting until it becomes serious. If you are thinking about selling in West Hampstead or the surrounding North West London area and want to understand how the whole process would be handled, you can request a valuation. If you already have a sale underway and want a straightforward conversation about how it is progressing, get in touch.
