How London's Housing Crisis Reached Breaking Point: The Decisions That Got Us Here

London needs to build approximately 66,000 new homes every year to keep pace with its population. Last year, it managed fewer than 30,000. That gap — persistent, politically inconvenient, and now structurally baked into the capital's economy — is the product of choices made across four mayoralties, three prime ministers, and a planning system that has not been fundamentally reformed since the Town and Country Planning Act of 1990.

The Starmer government's Planning and Infrastructure Bill, currently working through the Lords after its Commons passage in May, is being presented as the most ambitious overhaul of housing policy since the post-war era. Whether it arrives in time to matter for Londoners already spending 40 percent or more of their take-home pay on rent is a different question entirely.

The Long Road to a Broken Market

The roots of the current crisis are not hard to trace. The Right to Buy scheme, expanded aggressively under Thatcher and never properly wound back by successive governments, stripped London's social housing stock by roughly 250,000 units between 1980 and 2020. Councils were legally barred from using sale receipts to build replacements. Southwark, once one of the largest social landlords in Europe, sold thousands of homes on the Heygate Estate in Elephant and Castle between 2011 and 2014. The redevelopment that followed, the Elephant Park project by Lendlease, delivered a fraction of the originally promised affordable units — a pattern repeated at Earls Court, the Aylesbury Estate in Walworth, and the Wood Wharf development in Canary Wharf.

The 2012 Olympic development in Stratford was supposed to demonstrate that major regeneration could deliver genuinely mixed communities. The Olympic Delivery Authority promised 50 percent affordable housing across the Queen Elizabeth Olympic Park site. The final figure for the first phase of East Village, the former athletes' village, came in at around 28 percent. Subsequent phases have been lower still. Meanwhile, average asking rents in the E20 postcode have risen from roughly £1,100 per month in 2013 to over £2,400 today.

Boris Johnson, during his two terms as Mayor between 2008 and 2016, approved a series of tall-tower schemes along the South Bank and in Nine Elms that were sold partly on affordable housing cross-subsidy arguments. The Nine Elms development, spanning 195 hectares between Vauxhall Bridge and Chelsea Bridge, attracted more than £15 billion in investment. Its 20,000 new homes have done essentially nothing to ease pressure on Brixton or Stockwell, the nearest established communities, where average house prices crossed £600,000 in 2024.

What the Current Government Is Betting On

Sadiq Khan's current mayoralty has set a target of 40,000 new homes per year across Greater London. The Greater London Authority's London Plan, last revised in 2021, designates specific Opportunity Areas — Old Oak Common, Thamesmead, and the Barking Riverside development among them — as the sites expected to absorb the bulk of that growth. Old Oak Common alone, overseen by the Old Oak and Park Royal Development Corporation, is projected to deliver 25,500 homes by 2040, anchored by the HS2 station that has itself been repeatedly delayed and descoped.

The Planning and Infrastructure Bill would, if enacted in its current form, strip back the ability of local authorities to block housing developments on design grounds alone, create mandatory housing delivery targets with financial penalties for councils that fall short, and establish a new Infrastructure Levy to replace the current Section 106 agreements that developers negotiate individually with boroughs. Critics from the Local Government Association argue the levy's formula, as currently drafted, could actually reduce affordable housing contributions in high-land-cost areas — which means most of inner London.

For renters and buyers trying to plan their lives around what happens next, the immediate picture is this: the Bill is not expected to receive Royal Assent before early 2027, and its most significant provisions — the zoning reforms and the new levy — will require secondary legislation that could push implementation to 2028 or beyond. Organisations including Shelter and the London Housing Foundation are urging the government to bring forward emergency measures in the autumn Budget, including restoring ring-fenced funding to councils for social rent construction, which was effectively abolished in the 2010 Spending Review and has never been fully reinstated.