Why one in four prime London homes now sells off-market

One in four prime London transactions now happens entirely away from the public market. That figure is not ours. It comes from Hamptons International, whose off-market research has been cited everywhere from The Times and The Sunday Times to the Financial Times and the Telegraph. No Rightmove listing. No Zoopla alert. No price history visible to the next buyer’s solicitor. This is not a niche or an anomaly. It is a structural feature of how the capital’s finest property now changes hands, and at the top of the market it is no longer the exception but the rule.

The shift did not happen overnight. For decades, a small cohort of high-net-worth buyers and discreet vendors operated through informal networks: trusted agents, private introductions, word passed over lunch at the right club. The off-market sale was the preserve of the ultra-wealthy, conducted entirely on trust and personal relationship.

What changed was awareness first, infrastructure second. As more agents and sellers came to understand the damage that public marketing data can do (the logged days on market, the flagged price reductions, the visible withdrawals), they began looking for other ways to sell, often before a property ever reached the portals. In practice, that meant agents picking up the phone to the buyers they already knew. It worked, up to a point. But sellers were missing buyers they had never met, and buyers were missing homes they would have bought. The private market had supply and demand. What it lacked was infrastructure. Platforms like Invisible Homes sprang up precisely because that infrastructure was needed: a way for a seller in Notting Hill to reach every serious buyer quietly, without needing the personal number of a partner at a Mayfair agency.

The numbers explain why the habit stuck. According to Hamptons, a record 23 per cent of London homes changed hands without ever being openly marketed in early 2022, nearly triple the share of 2018. By 2023, one in three £1m-plus sales happened off-market, the highest level since records began in 2007, and above £2m it was more than half. As CNN reported, “off-market home sales have surged in the British capital, accounting for more than one-in-five transactions”. The Sunday Times put it more simply: “Off-market sales have gone mainstream, with the number of properties sold this way hitting new highs.”

What is driving the move off-market?

Several forces are converging. The first is the psychology of the seller. A property that sits on Rightmove for 90 days acquires a stigma that is extremely difficult to shake. Days on market is the single most powerful signal to any serious buyer that something is amiss, and vendors at the prime end of the market know it. Going off-market removes the clock entirely. A property can test the waters, withdraw without trace, and return, or not, on the seller’s own timeline. It is what The Times, writing about Invisible Homes, called the ability to “test the waters without appearing online”. Hamptons’ research shows how deliberately sellers now use that freedom: in 2023, one in five £1m-plus vendors who lost their initial buyer chose to sell off-market rather than relist publicly. “Post-pandemic, selling off-market has increasingly been driven by sellers keen to avoid wider marketing and limiting the number of buyers through their doors,” Aneisha Beveridge, head of research at Hamptons, told The Sunday Times.

The second force is the buyer. Buyers have become increasingly aware of just how much of the market now moves privately, and increasingly determined not to miss it. The committed ones have learned to work the system: befriending the right agents and reminding them, politely and regularly, to make sure they are on the list when the best homes arrive. Others register with platforms like Invisible Homes, where that work is done by matching rather than memory. And a growing number hand the task to buying agents, professionals paid to do the hard work of covering the private market on their behalf. Beveridge again: “Buyers have been willing to pay a premium to secure their home off-market and prevent sellers from marketing the property openly to other interested parties where competition is rife.”

“Invisible Homes allows you to approach serious buyers … without that time stamp gathering around a property.”

Daily Mail

Third, and perhaps most importantly, the agent relationship is evolving. The top tier of London agency has begun to treat off-market capability not as an occasional convenience but as a core differentiator. By early 2023, CNBC was reporting that London’s luxury home sellers had turned to WhatsApp as private sales surged. An agent who can demonstrate a deep network of pre-qualified buyers, and who can transact without any public footprint, is offering a fundamentally different product. Sellers notice.

What buyers miss when they stay on the portals

The implications for buyers are stark. If a quarter of prime transactions never appear on the open market, then a buyer who relies exclusively on portal search is, by definition, operating with incomplete information about what is available. On Hamptons’ figures, the gap widens precisely where it matters most: above £2m, more than half of everything sold in 2023 never carried a public listing. A portal-only buyer is not seeing the whole market. They are seeing the market that could not sell elsewhere, or the market that has not yet found an alternative.

This creates a two-tier dynamic. Members of platforms like Invisible Homes are seeing properties that their peers will never encounter. In a market characterised by constrained supply (London’s prime housing stock does not grow), access is the advantage. Being in the room matters more than search strategy.

It is worth noting that off-market does not mean off-value. Prices achieved privately are not systematically lower than open-market equivalents; sales through our platform complete at around five per cent above open-market averages. In many cases, the absence of competitive bidding theatre is exactly what both parties want: a clean transaction, at a fair price, with minimal noise. Discretion commands its own premium.

The data behind the shift

Our own platform data reflects this dynamic clearly. In the first quarter of 2026, the average number of days between a property being made available to members and an offer being accepted was fourteen. There was no public listing. There was no photography campaign, no portal launch, no window card. Fourteen days from private availability to accepted offer, for properties with a median value of £2.4 million.

Compare this with the open-market equivalent in the same postcodes over the same period: a median of 67 days to acceptance, with a meaningful proportion of listings withdrawn without sale. The private market is not merely different in character. It is measurably more efficient for the parties involved. When PrimeResi described Invisible Homes as “a specialist off-market platform that’s proving a hit”, these figures are why.

The direction of travel is clear. As more vendors experience the speed, discretion and control of an off-market transaction, and as more buyers discover what they have been missing, the proportion of prime London sales conducted privately will only increase. The Financial Times described what has emerged as “an online market for off-market homes”. That is exactly right. The platforms that connect buyers and sellers intelligently are not facilitating a trend. They are becoming the market.

Thinking of selling privately? Request a confidential valuation. Ready to see what the portals cannot show you? Register as a member.