London Councils Launch Judicial Review Against Mayor's Affordable Housing Target Cut

Executive Mayor Lutfur Rahman described the move to cut the affordable housing quota as 'a scandal to cut the affordable housing quota when the need for genuinely affordable homes has never been greater,' arguing that ordinary Londoners are at risk of being unable to afford homes while homelessness and overcrowding remain widespread (e.g., '1 in 20 children homeless' and over a million Londoners in overcrowded or unfit housing).
Hackney Green Party executive mayor Zoe Garbett called the policy change 'a developer's solution' and said local authorities have not been properly consulted, arguing it removes local decision-making authority over housing development.
Lewisham Mayor Liam Shrivastava highlighted the pressure on residents by noting more than 10,000 people are on the borough’s housing waiting list and stressing that communities 'are crying out for genuinely affordable housing.'
Official housing production figures cited in the challenge show a broader affordability gap: just 3,991 affordable homes were built in 2024-25, while net additions of housing totalled about 31,000 in London, far short of the government’s projected 88,000 annual need.
The Oct 2025 change to the affordable housing quota—reducing it from 35% to 20%—was publicly framed as a joint move by the government and the Mayor of London to speed up planning decisions amid stagnating house-building.
Three London councils filed a High Court judicial review on June 24, 2026, against Mayor Sadiq Khan over his plan to slash the affordable housing quota from 35% to 20% Inside Housing. Tower Hamlets, Hackney, and Lewisham argue the change was made without proper consultation or legal process — and that ordinary Londoners will pay the price.
The quota cut was announced in October 2025 as an emergency measure to speed up housebuilding Construction Management. Critics say it does the opposite — and hands a windfall to developers at a time when 90,000 London children are already homeless.
Since 2016, London's planning rules offered developers a "fast track" if they committed to 35% affordable homes. That avoided long viability checks. But as housebuilding stalled in 2024 and 2025, Mayor Khan and Housing Secretary Steve Reed announced an emergency cut to 20% on October 23, 2025 Inside Housing. Developers who accepted the lower quota also got a 50% cut in Community Infrastructure Levy charges — a tax paid to fund local services.
City Hall says the change was needed to "kick-start" a frozen market. But BD Online reports that some developers actually delayed schemes to wait for the lower 20% threshold to kick in. Critics say the policy is already slowing construction, not speeding it up.
The three councils make two core legal claims. First, they say the London Plan — a formal statutory document — was changed without following the legal steps required for a proper review Greenwich Wire. Second, they say borough councils and the public were never properly consulted before the quota was cut.
Tower Hamlets Mayor Lutfur Rahman called it "a scandal to cut the affordable housing quota when the need for genuinely affordable homes has never been greater" Construction Management. Hackney's Green mayor Zoe Garbett was equally blunt, saying Khan "is no longer surrounded by councils willing to sign off any developer-driven decision he wants to make" Inside Housing.
The numbers behind this case are stark. London built just 3,991 affordable homes in 2024-25 — the second-lowest figure on record — against a government target of 88,000 new homes per year Inside Housing. Tower Hamlets has 31,000 people on its housing waiting list. Lewisham has more than 10,000. Over 1 million Londoners live in overcrowded or unfit housing.
Lewisham Mayor Liam Shrivastava said communities "are crying out for genuinely affordable housing" and warned it "would be totally wrong to allow profit to go unchecked while thousands of people are on councils' housing waiting lists" Greenwich Wire. Green Party leader Zack Polanski added that roughly 1 in 21 children in London is currently homeless and living in temporary accommodation.
If the High Court sides with the councils, the GLA could be forced to revert immediately to the 35% quota BD Online. That would put current projects approved under the 20% threshold in legal limbo. Some Labour council leaders, like Greenwich's Anthony Okereke, back Khan's approach — arguing the lower target keeps schemes moving rather than getting "stuck in the planning system."
If the Mayor wins, construction may speed up — but housing experts warn London risks filling up with luxury units that do nothing for people on waiting lists. The proportion of Londoners in poverty rises from 15% to 26% once housing costs are counted Inside Housing. The court's decision will shape who gets to live in London for years to come.
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