Almost four in 10 London flats sell at a loss: what it means for flat owners and buyers in Clapham, Battersea and Brixton

Here's a headline to put you off your morning coffee. Almost four in 10 London flats that were resold after five to 10 years went for less than the owner paid for them.

Not a typo. Four in 10. And before the doom merchants get going, let's look at what the numbers actually say, and what they mean if you own, or want to buy, a flat South of the River.

So what's happening?

The figures come from e.surv Chartered Surveyors' October house price report, which compared repeat sales using HM Land Registry and Registers of Scotland data over the 12 months to August 2026.

The cold hard facts:

• Across Great Britain, just over a quarter of flats resold after five to 10 years of ownership fetched less than their previous purchase price.
• In London it was almost four in 10 - the highest proportion in the country.
• Among London houses held for the same period, fewer than 4% sold at a loss.
• Around a third of flats in the South East and East of England sold for less than they cost. In the Midlands and the North it was closer to one in five, and in Scotland fewer than one in 10.
• Holding on longer didn't make the problem disappear. Across Great Britain, 16.6% of flats resold after 10 to 15 years fetched less than their previous price, against 1.9% of houses.

e.surv says flats and houses started to pull apart around 2017, as leasehold, building safety, cladding and service charges increasingly shaped the decisions of buyers, sellers and lenders. Interestingly, the gap is much narrower in Scotland, which has a different system for owning and managing flats. The report is careful to say that doesn't prove tenure is the cause, but it suggests the way flats are owned and managed may matter.

And the wider backdrop? The average home in Great Britain was £328,900 in September, down 0.2% on the month and the quarter, but still 1.5% up on a year earlier. London was the only region where prices fell over the year, down 2.3%.

If you want to feel even worse, a Telegraph analysis of Land Registry data put 76% of flats in England and Wales as loss-making in the 12 months to August once you allow for inflation. That's a real-terms figure, mind, not cash.

But what does it mean for Clapham, Battersea and Brixton?

Now ears must perk up, because our patch is flat country. Think of the converted Victorian terraces off Abbeville Road and Lavender Hill, the mansion blocks around Clapham Common, the ex-local authority flats in Stockwell and Brixton, and the newer glass towers along the river at Nine Elms and Battersea.

They are not all the same product, and buyers know it. Bear in mind what the report points to: leasehold terms, building safety and service charges. Those are exactly the things buyers and their lenders now pick apart on every flat purchase.

So, roughly speaking, here's who wins and who loses locally:

• Sellers who bought a flat around 2016-2019. This is the group most likely to feel it. If you bought at or near the last peak and haven't added value since, a nominal loss is a real possibility.
• Owners in blocks with cladding questions or chunky service charges. Expect buyers to ask harder questions and lenders to be choosier. Get your paperwork (lease length, service charge history, any fire safety documents) together before you list, not after an offer.
• First-time buyers. Let's face it, this is good news for you. More choice, more room to negotiate, and sellers who are realistic about price. Do your homework on the lease and the building, though, because the reasons prices are soft are the same things that could bite you when you come to sell.
• Landlords. A flat that hasn't grown in value can still earn its keep if the rent covers the costs. Yield and capital growth are two different questions.

My take

You see, here's the thing. A flat is not a bad investment because it's a flat. It's a bad investment when you overpay, buy a short lease, ignore the service charge or buy into a building with safety issues hanging over it.

The data tells me flat buyers have got wiser, and lenders more careful. Sellers need to catch up. Price it right, have the leasehold pack ready on day one and be honest about the building. The flats that are presented properly still sell. The ones that aren't sit there, and then the price comes down anyway.

Houses, meanwhile, keep doing what houses do in London. If you're a flat owner thinking about the next step up the ladder, the numbers are a reminder to look at the whole move, not just your sale price.

So there you have it. Not quite doom and gloom, but a clear message: in the flat market, the detail is everything.

Do you own a flat in Clapham, Battersea or Brixton and wonder where you stand, or are you a buyer weighing up a flat against a small house? I'd genuinely like to hear how it's playing out on your street. Drop me a line at jeroen@claphampropertyblog.com or call 07837 093554.

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07837 093 554

Sources: e.surv Chartered Surveyors October 2026 house price report via Property118 (12 October 2026), The Negotiator (8 October 2026), The Telegraph (2 October 2026).