Sadiq Khan Misses London Affordable Housing Target: City Hall Report 2026

Key Points

• Target Shortfall: The Mayor of London, Sir Sadiq Khan, has failed to meet the revised, downsized target for affordable housing starts under the 2021–2026 Affordable Homes Programme (AHP), delivering thousands fewer homes than required.
• Funding Allocation: The mayor was allocated £4 billion in funding from central government ministers to manage the delivery of the 2021–2026 housing cycle.
• Downward Revision: After interim reports indicated slow progress, the original target of starting between 23,900 and 27,200 affordable homes was slashed by 22% last year to a lower range of 17,800 to 19,000 starts.
• Final Delivery Figures: Despite the reduction, City Hall registered only 14,335 affordable housing starts before the initial deadline passed, missing the bottom end of the lowered threshold.
• Extension Window: Following the expiration of the March deadline, Homes England announced a case-by-case extension policy allowing up to six additional months for stalled delivery.
• The Backlog Crisis: The London Assembly’s housing committee revealed that 27% of homes started under the older 2016–2023 AHP remain uncompleted, leaving 32,081 homes in limbo.
• Supply vs. Demand Gap: In 2024/25, London added a net total of just 8,184 affordable homes to its inventory, contrasting sharply with Greater London Authority (GLA) estimates that the capital requires 45,500 net affordable homes annually between 2026 and 2036.
• Waiting List Burden: Social housing backlogs have climbed to 341,421 households across all London boroughs, making up a quarter of the entire national total. Newham records the highest backlog with 41,223 households.
• Borough Disparities: Tower Hamlets led the capital with 1,484 GLA-funded starts since 2023, while four separate boroughs—Kensington and Chelsea, Harrow, Bexley, and Richmond—all recorded fewer than 60 starts.

London (Extra London News) July 10, 2026 – The Mayor of London, Sir Sadiq Khan, has fallen significantly short of a heavily revised, government-mandated affordable housing target by thousands of homes, a scathing new legislative review has revealed. According to an official report published by the London Assembly’s housing committee, the capital failed to secure the minimum number of residential construction starts required under the central government’s multi-billion-pound funding scheme, exposing severe delivery bottlenecks at City Hall. The disclosure comes despite federal interventions last year that explicitly lowered the mayor’s administrative targets by nearly a quarter to prevent a projected regulatory failure.

The administrative failure centers on the 2021–2026 Affordable Homes Programme (AHP), a framework under which ministers allocated £4 billion directly to the Greater London Authority (GLA). City Hall’s original objective dictated starting construction on between 23,900 and 27,200 new affordable properties. However, following interim data showing heavily suppressed progress across the capital, central government officials intervened last year to slash the baseline target by 22%, modifying the required range downward to between 17,800 and 19,000 homes. The housing committee’s investigation confirmed that the mayor ultimately missed even this reduced benchmark, managing just 14,335 verified affordable housing starts under the 2021–2026 programme before the formal deadline elapsed.

Why Did Sadiq Khan Miss The Lowered Housing Targets?

The failure to meet the scaled-back baseline has drawn sharp scrutiny to City Hall’s operational capacity and the overall viability of London’s development models. As reported by the Local Democracy Reporting Service (LDRS), Assembly Member Lord Bailey, Chairman of the Housing Committee, stated that “Affordable housing delivery is still falling far short of what London needs. Even after targets were revised downwards, they were not met.” Lord Bailey further observed that while the shortfall “reflects the severe challenges facing housebuilding in London,” it simultaneously “raises important questions about what must change if future programmes are to succeed.”

Compounding the failure of the active 2021–2026 cycle are long-standing execution delays trailing from previous mayoral terms. The committee highlighted that a staggering 27% of the residential projects initiated under the prior 2016–2023 AHP have still not reached physical completion. This outstanding development backlog means that 32,081 homes across the capital exist merely as incomplete work-in-progress sites, locking up vast capital allocations while failing to provide actual tenancies for Londoners out on the streets.

How Big Is The Gap Between London’s Housing Need and Delivery?

The structural shortfall in municipal housebuilding occurs at a time when the gap between public demand and actual supply has expanded to historic proportions. The London Assembly housing committee noted that during the 2024/25 financial period, the net addition to London’s usable affordable housing stock amounted to just 8,184 units. This rate of expansion stands in stark contrast to the internal projections issued by the Greater London Authority itself. GLA analysts previously established that London requires a net influx of 45,500 dedicated affordable homes each single year between 2026 and 2036 just to satisfy baseline demographic pressures and address the city’s ongoing affordability crisis.

The operational shortfalls have placed severe, compounding pressure on municipal social housing systems. The committee’s report confirmed that there are currently 341,421 households languishing on social housing waiting lists across the entirety of London’s boroughs—a figure that represents fully one-quarter of the total housing waiting list backlog for the entire United Kingdom. On a local level, the borough of Newham holds the longest registry with 41,223 households waiting for permanent placement, followed closely by lengthy queues in Brent, Lambeth, and Tower Hamlets.

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Is The Current Affordable Housing Model Completely Broken?

Political opponents argue that the structural reliance on private development to cross-subsidize public sector accommodation has proven fundamentally flawed. As reported by the Local Democracy Reporting Service (LDRS), Benali Hamdache, a Green Party London Assembly member, stated: “The data shows that the current model for delivering affordable housing is fundamentally broken. The hope was that building more luxury flats would deliver new council housing. It’s clearly not the case.”

Assembly Member Hamdache heavily criticized the composition of the projects being advanced under the banner of affordability, pointing out severe qualitative deficiencies in tenures. As reported by the LDRS, Benali Hamdache stated that “Since 2015 only 10% of affordable home completions were social rent homes, the type of homes we need the most. Things like shared ownership are not affordable, but represent the most common type of so-called ‘affordable’ housing being delivered.” The Green Party representative urged an immediate strategic pivot, adding that “One of the top priorities for the mayor should be to work with the incoming prime minister Andy Burnham to address this housing emergency, and start reimagining a new way to deliver housing for people, not profit.”

Which London Boroughs Are Building The Most Affordable Homes?

The spatial distribution of housing starts across the capital reveals an intense geographic imbalance, with a small number of local authorities carrying the vast majority of City Hall’s development portfolio. The committee’s data highlighted Tower Hamlets as the undisputed leader in localized production, securing 1,484 GLA-funded affordable home starts since 2023. This dense pocket of construction accounts for a significant portion of the 15,715 total units successfully delivered across the East London authority over the course of the last three years.

Which London Boroughs Are Falling Behind On Housing?

Conversely, regional output drops to near-negligible levels across several affluent and suburban municipal districts. The legislative report singled out four specific London boroughs—Kensington and Chelsea, Harrow, Bexley, and Richmond—where affordable housing starts hit critically depressed rates. Over the analyzed multi-year window, each of these four local administrative jurisdictions registered fewer than 60 total affordable housing starts, drawing criticism regarding local zoning resistances and uneven infrastructure investments across the capital.

What Is City Hall Doing To Fix The London Housing Crisis?

Despite the critical data points raised within the legislative text, City Hall officials have pointed to long-term performance gains and shifting construction dynamics as evidence of structural progress. Administrative data reveals that last year, 39% of all completed new-build properties within the capital qualified under affordable classifications, an escalation compared to the 19% recorded during the 2016/17 cycle. Furthermore, 86% of all newly initiated residential foundations across London were categorized as affordable housing, representing a substantial increase over the 46% baseline registered eight years earlier.

Responding to the findings, City Hall representatives defended the mayor’s record by highlighting severe macroeconomic head-winds that have paralyzed the wider British construction sector. As reported by the LDRS, a spokesperson for Sir Sadiq Khan stated: “Tackling our urgent housing crisis is one of the mayor’s top priorities and he is doing everything he can to deliver more homes of all tenures. Sadiq has been warning for some time that the impact of Brexit, the pandemic, high interest rates and the economic shocks caused by global instability mean that we are amid the most difficult period for housebuilding since the global financial crash.”

To counteract these broader economic limitations, the mayoral administration highlighted several newly deployed financial instruments and regulatory modifications aimed at restarting dormant developments. As reported by the LDRS, the spokesperson for Khan stated: “The mayor is backing housing associations and councils with a record £11.7billion London Social and Affordable Homes Programme over the next decade. The new City Hall Developer Investment Fund adds £322m in grants and £1.5bn in ultra-low-interest loans for housing associations, unblocking stalled sites and speeding up affordable and social housing across the capital.”

Additionally, mayoral aides emphasized that recent institutional agreements with central ministers, alongside administrative adaptations to the Building Safety Regulator (BSR), would offer vital relief to the capital’s strained building sector. Officials point to newly expanded executive powers enabling City Hall to directly review, intervene in, and “call-in” stalled commercial housing developments, coupled with stronger regulatory mandates to enforce mayoral development orders. The spokesperson further stated that the mayor is currently on track to deliver 6,000 new rent-controlled homes earmarked specifically for key public workers, asserting that these integrated “new measures will continue to ramp up housebuilding in London and bring forward thousands of homes more quickly, as we build a better London for everyone.”

How Are Extended Deadlines Influencing Present Completions?

Recognizing the severe friction gripping localized real estate markets, statutory oversight bodies have begun introducing regulatory flexibility to prevent a complete collapse of active pipelines. Following the official passing of the primary March deadline, Homes England announced an administrative grace period, confirming that the delivery window for the 2021–2026 Affordable Homes Programme would be extended by up to six months evaluated on a case-by-case basis. City Hall remains optimistic that this emergency extension will grant hard-pressed housing associations and municipal councils the operational buffer required to successfully advance outstanding projects into formal construction, potentially recouping a portion of the missed targets before structural funding allocations expire entirely.