'Our flat has been for sale for four years': Why is the market so weak?

In 2015, thousands of people queued overnight in the rain to reserve and buy studio apartments selling for under £200,000 in Hounslow, west London.

It's in stark contrast to today's appetite for flats, with property portals reporting a slump in sales.

But why, when the country is in a housing crisis with a desperate need for affordable homes , are flats now struggling to sell?

According to the property site Zoopla, 88% of flats listed for sale in inner London on its website in 2025 did not find a buyer within six months. The company also says the gap between the value of a flat and a house is the widest it has been for 30 years.

Executive director Richard Donnell points to post-pandemic social changes with "people looking for space, prioritising houses, working from home".

He also points to higher mortgage rates, people concerned about "all the costs and liabilities of owning a property" including service charges and ground rents.

In September, nearly all the major mortgage lenders in the UK announced increases in the cost of home loans.

Donnell says flats in inner London are struggling in particular as they are more expensive, the service charges are higher, and "there's greater complexity - it's highly likely it's a bigger building, maybe more of a complex building, so less are selling within six months".

This is a message echoed by property platform Rightmove, which says as of August, only 50% of flats listed for sale nationally successfully find a buyer, compared to 65% of houses.

Nationally, as of August, the average price for a flat is down 2% from 12 months prior. That is the largest drop seen over the period by any type of property.

Compared with August 2021, flats have only risen in price by 4% nationally, the least of all property types.

Colleen Babcock, Rightmove's head of partner marketing, says London faces additional challenges because its market is heavily weighted towards flats, and "affordability more broadly remains a key challenge".

She points to higher borrowing costs, increased stamp duty costs , and the limitations of the Lifetime ISA in higher-priced areas, which mean both first-time buyers and home-movers in London can face additional hurdles when buying a home.

Flats aren't becoming unsellable for one single reason. Higher borrowing costs, service charges, leasehold and shared ownership complications have made them more expensive and complicated to own, damaging their reputation.

James Schaife, 36, says he and his partner are "on the verge of bankruptcy" after struggling to sell their one-bedroom north London flat for the past four years.

He bought a 35% share of the £585,000 flat - run by Newlon Housing Trust - in 2017, but after his partner got a new job, James moved out of London in 2022 and relocated north, putting the flat on the market.

Within an initial "nomination period" - a set window of time where the association has the exclusive right to find an eligible buyer - the flat generated next to no interest.

The housing association gave them permission to sell it on the open market - but James claims they have been "forced to use a narrow selection of valuers chosen by Newlon", despite estate agents telling him the flat has been overvalued.

They have been forced to rent out the property with a special "consent-to-let" agreement with their housing association - although this is due to expire imminently and James claims Newlon will not renew it.

James said the situation has affected their plans to start a family, pushing them back to an age "where it's probably unlikely that we'll have children".

A spokesperson for Newlon Housing Trust said that "this is not a picture we recognise", adding that they were bound by "strict rules about resales to protect the public purse".

The spokesperson said that "strict rules to limit subletting... prevent the risk of people profiting by letting subsidised affordable housing".

"As is well reported, the sales market is flat. The saleability of a home at any time is subject to variation in the property market, which we have no control over, and is part of the risk taken on by anyone who buys a home."

Some flat-owners living in homes with building safety concerns have also found their properties impossible to sell.

It may be a more extreme example, but many find themselves in this position.

As of July 2026, there are 4,697 residential buildings 11m and over in height being monitored due to unsafe cladding , external , but work still isn't complete on 61% of them.

Sophie Bichener, leaseholder and campaigner with the End our Cladding Scandal group, said that flats with unsafe cladding left unremediated were like "prisons", and this is having a "devastating" impact on people's lives.

She bought her one-bedroom flat in Hertfordshire in 2017 but nine years later, now with a young family, she is unable to move to a bigger property as her building needs a second wave of fire safety repairs.

"Being trapped means that you can't move on with your life."

She points out that even buildings which have been remediated are affected by a market that is "so distrusting" at the moment.

"If you're in a position where you can get to market, there are so many hurdles... management packs costing hundreds of pounds, conveyancing solicitors not willing to take on buildings covered by the Building Safety Act."

Sophie thinks there should be a building safety register, "where you've got all the buildings noted, and we know what they're made of" to help boost buyer confidence.

The BBC has also investigated problems with new-build properties , including people living in brand-new flats.

Their stories come as the number of complaints to the New Homes Ombudsman Service has more than tripled in a year, according to its latest annual report.

The UK-wide service received just over 1,800 complaints in 2025-26, up from fewer than 600 the previous year. Defects and snagging were the most common issues raised.

The ombudsman says the increase partly reflects more homeowners being eligible to use the service, as well as greater awareness of it.

At the same time, developers say building new homes is becoming more expensive, adding to pressure on London's already limited housing supply.

Home-builders estimate that the cost of delivering a new property , external has risen by an estimated average of £76,000 per home, equivalent to more than 20% of the average new home value of £365,000.

They claim the increase is down to higher labour and material costs, additional regulations, and tax and levy rises.

James Stevens, director for cities at the Home Builders Federation (HBF), said: "The collapse of London's housing supply presents a real threat to the capital's economic and social prospects.

"Housing starts in London have fallen to an alarmingly low level and have been on a downward trend for some time. An urgent overhaul of housing and planning policy is now critical to supporting the housing needs of all Londoners – particularly the capital's first-time buyers who face the biggest barriers to home ownership in the country."

The HBF also reported in October 2024 that there were 17,432 Section 106 affordable units that remain unallocated.

Zoopla's executive director Richard Donnell says affordability needs to improve.

"I think everyone's hoping that mortgage rates come down. The government's announced some reforms to leasehold to improve some of the certainty. They focused on the transparency and so buyers can get more of an understanding of what they're buying."

He says there could be a reduction in marriage value, which is a payment to extend the lease on a flat with fewer than 80 years remaining, and make it "much clearer and easier for tenants and long leaseholders to take more control of their costs and destiny".

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A spokesperson for the Ministry of Housing, Communities and Local Government said "We're taking decisive action to help people up and down the country to buy and sell flats with greater confidence, including in London.