Sadiq Khan Sued by Hackney Over Slashed Housing Targets: London 2026

Key Points

• Legal Alliance Formed: The London Borough of Hackney has partnered with Tower Hamlets and Lewisham to launch a joint legal challenge against the Mayor of London, Sir Sadiq Khan.
• Policy Dispute: The judicial review targets a controversial October 2025 decision by City Hall to cut the capital’s baseline affordable housing requirement for new developments from 35 per cent to 20 per cent.
• Procedural Failures Alleged: The local authorities argue that the Mayor of London violated statutory procedures by failing to conduct a formal consultation with boroughs before implementing the sweeping policy change.
• Local Targets Undermined: Hackney Council maintains a local planning target of 50 per cent affordable housing, which local leaders argue is being undermined by the new London-wide emergency framework.
• Escalating Housing Crisis: The legal action comes amidst a severe housing crunch, with Hackney alone recording nearly 8,000 households on its council housing waiting list and 3,500 families stuck in temporary accommodation.
• Cross-Party Coalition: The coalition brings together politically diverse administrations, featuring the Green Party-led councils of Hackney and Lewisham alongside the Aspire-led cabinet of Tower Hamlets.
• City Hall Defense: The Greater London Authority (GLA) previously justified the “temporary, short-term” measure as essential to kickstart stagnant development, pointing to a severe shortfall where only 3,991 affordable homes were completed across London in 2024–25.
• Financial Strain: The backdrop of the litigation includes escalating municipal costs, with London local authorities collectively spending an estimated £5.5 million every single day on homelessness services.

Hackney (Extra London News) June 24, 2026 – A cross-party coalition of London boroughs has launched a high-stakes legal battle against the Mayor of London, Sir Sadiq Khan, over his controversial decision to slash the capital’s affordable housing targets. The boroughs of Hackney, Tower Hamlets, and Lewisham have officially applied for a judicial review of the policy introduced in October 2025, which reduced the minimum affordable housing quota for new private developments from 35 per cent to 20 per cent. The local authorities contend that City Hall failed to follow mandatory statutory processes and bypassed necessary consultations with local councils before implementing the emergency planning framework. The legal challenge highlights a deepening rift between local government leaders dealing with a combined social housing waiting list of over 50,000 families and a regional government attempting to revive stagnant commercial housebuilding through developer incentives.

Why are London boroughs taking Sadiq Khan to court?

The crux of the legal dispute rests on allegations of procedural unfairness and a lack of democratic consultation. As detailed by journalists at the Hackney Citizen, the three local authorities filed papers for a judicial review following a unilateral decision by the Mayor of London and the central government to alter the London Plan’s planning criteria.

The boroughs argue that as the local planning authorities responsible for executing housing strategies on the ground, they are directly impacted by any alteration to regional targets. By bypassing a formal consultation process, the boroughs claim City Hall acted outside its statutory authority, denying local communities and elected representatives a voice in a policy change that directly affects local municipal planning rules.

Legal experts suggest the case will hinge tightly on administrative law and the explicit duties placed on the Greater London Authority (GLA). Commenting on the legal mechanics of the challenge, Nick Bano, a specialist housing barrister at Garden Court Chambers, observed that the local councils’ case turns principally on the extent to which they had been consulted before the new rule was introduced. Bano stated that because local authorities are “the ones who are going to have to make planning decisions,” they remain “very, very heavily affected” by the regional policy shift. Consequently, Bano argued that the boroughs possess “a strong argument that they should have been consulted thoroughly, and their view should have already counted” before any final policy determination was published by the executive.

What is the affordable housing crisis in Hackney?

The legal action is being driven forward by a worsening housing shortage across inner London, with Hackney experiencing some of the most acute pressures in the United Kingdom. Local administration figures highlight a severe imbalance between the supply of social housing and the number of residents requiring secure accommodation.

According to the latest official municipal data published by Hackney Council, almost 8,000 households are currently registered on the borough’s council housing waiting list. Furthermore, some 3,500 families are presently surviving in temporary accommodation, which often includes nightly-paid bed and breakfasts, private hostels, or short-term private rentals funded by the local authority.

The social and economic impact on the local population remains a central argument for the borough’s leadership. As reported by the Hackney Citizen, the newly elected Mayor of Hackney, Zoë Garbett, who took office last month following local elections, described the housing situation within her borough as nothing short of “desperate.”

Garbett expanded on the local reality, stating to reporters:

“As Mayor of Hackney, my goal is simple: a Hackney our communities can afford to stay in. But with 40 per cent of residents living in deprivation – and local families facing some of the longest waiting times for social housing – we urgently need more affordable social homes. To do that, we must ensure developers build genuinely affordable housing, and take action against those that don’t.”

How does the 20 per cent target affect local council planning rules?

The primary friction between regional and local government lies in how planning targets are set and enforced. Under its own localized planning framework, Hackney Council’s independent planning rules explicitly require private developers constructing new residential projects within the borough to offer at least 50 per cent of the units at affordable or social rent levels. While this target remains subject to an independent viability assessment, it stands at more than double the new London-wide minimum introduced by City Hall.

Local leaders fear that by establishing a lower baseline of 20 per cent at the regional level, the Mayor of London has effectively undermined the negotiating power of individual boroughs. Developers can now utilize the London-wide emergency policy to bypass stricter borough requirements, arguing that higher local targets render their projects financially unviable under the updated regional guidelines.

Expressing her frustration with the structural shifts, Mayor Zoë Garbett stated to the Hackney Citizen that local communities are being actively disadvantaged by the changes. Garbett argued:

“Instead we have a Mayor of London doing the opposite – slashing targets, undermining the progress Hackney residents desperately need, and letting developers off the hook. The Mayor of London is no longer surrounded by councils willing to sign off any developer-driven decision he wants to make. Hackney now has a Mayor who will go to bat for affordable housing.”

Why did Sadiq Khan cut the affordable housing target?

What was the temporary emergency package designed to achieve?

In October 2025, Sir Sadiq Khan and the central government jointly announced an emergency modification to London’s housing quotas, lowering the affordable requirement from 35 per cent to 20 per cent. The core incentive of this policy change was an administrative trade-off: private developers who committed to the lower 20 per cent threshold would be rewarded with a fast-tracked, stream-lined planning application process, bypassing conventional bureaucratic delays at City Hall.

What data did City Hall use to justify the decision?

Officials at City Hall have continually defended the intervention as an unpleasant but unavoidable economic necessity designed to revive a collapsed construction sector. Data monitored by the Greater London Authority revealed that just 3,991 affordable homes were completed across the entire capital during the 2024–25 financial year. This stood in stark contrast to independent macroeconomic estimates showing that London requires roughly 88,000 new residential homes per year to keep pace with demographic demand and population growth.

Defending the strategy at the time of its unveiling in late 2025, Sir Sadiq Khan emphasized that the structural freeze in residential construction required immediate, drastic measures. Khan stated:

“Homes being built in London have dried up, and it’s a nationwide problem. I’m not willing to stand by when that happens, and so working with the government we’ve announced today a temporary short-term package of emergency measures to kickstart house building in London.”

When approached by journalists regarding the newly filed judicial review, a spokesperson for the Mayor of London’s office stated that he could not comment on ongoing legal proceedings currently before the courts.

Which London boroughs are involved in the legal challenge?

How does political control vary across the participating boroughs?

The litigation represents a unique, coordinated cross-party front against the standard regional Labour administration. The legal challenge brings together three distinct political leaderships that rarely share a unified platform, indicating the severity with which local councils view the planning modifications.

The legal alliance consists of:

1. Tower Hamlets: Controlled by the independent Aspire party.
2. Hackney: Controlled by the Green Party following electoral shifts in May.
3. Lewisham: Also controlled by the Green Party following the same municipal elections.

The broad nature of the coalition highlights a significant shift in London’s political landscape, particularly after the Labour Party lost control of both Hackney and Lewisham in the spring municipal elections.

What are leaders in Tower Hamlets and Lewisham saying?

In Tower Hamlets, Mayor Lutfur Rahman has taken a hardline stance against the centralized reduction, asserting that his borough does not require a watered-down regional policy to attract investment. Rahman stated that he strongly favored a “borough-by-borough approach” to affordable housing targets. He pointed out that Tower Hamlets had remained highly viable under its own localized planning requirements, noting that no major private developers had withdrawn from active construction schemes despite the borough’s strict local demands. The situation in Tower Hamlets remains pressing, with over 31,000 people currently sitting on its municipal housing waiting list, a figure equivalent to approximately one in every 36 residents.

Meanwhile, the Mayor of Lewisham, Liam Shrivastava, focused his criticisms on the long-term effectiveness of City Hall’s supply-side economics. Shrivastava dismissed Sir Sadiq’s 20 per cent policy as little more than “political theatre.” To validate his point, Shrivastava pointed directly to existing, empty luxury developments within his own borough as physical evidence that London’s housing crisis is not simply a foundational issue of raw supply, but rather an issue of structural affordability. Lewisham currently has 10,500 households registered on its housing waiting list, alongside nearly 14,000 residents living in designated overcrowded conditions.

Explore more Hackney News:

Ardmore Collapse Puts 371 Britannia Project Homes on Hold: Hackney 2026

Handyman Sushi Omakase: A Brazilian DJ Redefines Dining in London Fields 2026

How has the housing sector responded to the policy shift?

The wider housing and construction industry remains deeply polarized over the regional policy change, revealing a fundamental disagreement between private-sector builders and non-profit social housing providers regarding how to solve the capital’s supply issues.

Why do private housebuilders support the lower target?

Private-sector trade groups argue that the previous 35 per cent target had become completely unworkable under modern macroeconomic conditions, effectively halting new developments before they could begin. Speaking on behalf of commercial developers, Steve Turner of the Home Builders Federation—which represents private-sector housebuilders across England and Wales—stated that the dramatic reduction in the affordable housing quota was entirely justified by the reality of a collapsing housing supply in London. Turner indicated that private builders face severe viability problems at the high end of the affordable requirement, where inflation, material costs, and high interest rates mean projects cannot secure private financing if affordable quotas are set too high.

Why are non-profit housing associations skeptical?

Conversely, the registered social landlords who actually manage affordable housing portfolios argue that tinkering with planning percentages fails to address the underlying financial decay of the sector. Ian McDermott CBE, the chief executive of Peabody and the current chair of the G15 group of London’s largest not-for-profit housing associations, stated that the structural problem facing the capital runs significantly deeper than simple planning targets. McDermott noted that “rising costs and tough economic conditions mean many affordable housing developments are struggling to stack up financially,” concluding that the entire delivery system is currently operating under “increasing strain” that cannot be fixed by developer incentives alone.

The financial cost of this systemic gridlock is borne directly by regional taxpayers. Due to the lack of permanent social options, London councils are now forced to spend a combined £5.5 million every single day on emergency homelessness services and temporary housing placements.

What does this mean for the relationship between Labour and the Greens?

The legal battle has brought a long-standing ideological conflict between the Labour Party and the Green Party regarding urban planning and social responsibility into the courtroom. The division has been a defining point of friction in local politics for several years, particularly within inner London seats.

During the lead-up to the May municipal elections, the campaign turned exceptionally hostile over this specific issue. Local party organizers reported that Labour distributed thousands of campaign leaflets across inner London claiming that “Greens across London have consistently opposed the social housebuilding projects they claim to support.” The Hackney Greens, who were in opposition at the time, strongly rebutted the claim, labeling it a misrepresentation of their planning voting record.

Following the legal filing, Green Party leaders have utilized the court case to draw a clear line between their municipal governance model and that of the regional Labour administration. In an official press statement, Green Party Leader Zack Polanski linked the legal challenge directly to his party’s broader platform on housing reform. Polanski stated:

“Every single one of the Green councils elected in London is backing this legal challenge to fight for affordable homes, alongside Tower Hamlets Council. Green mayors fight for a housing and planning system that works for people, not profit, while Labour mayors cut affordable homes.”

The lawsuit has been officially served on the Greater London Authority at its Royal Docks headquarters. Because Sir Sadiq Khan serves as the executive head of the GLA, he stands as the primary respondent in the upcoming High Court proceedings, setting the stage for a judicial ruling that could reshape local planning autonomy across the United Kingdom.