After a deadline extension, the London mayor has finally hit his affordable homes target – City Hall says the “vast majority” of new SAHP offers have been accepted, Inside Housing reports

The mayor of London has met the city’s affordable homes target after an agreed extension to the delivery timetable, City Hall has confirmed, with officials saying the “vast majority” of new offers under the SAHP have been accepted.The achievement – reported by Inside Housing – comes after months of slippage and political pressure over housing shortfalls, and follows a decision to push back the deadline to allow more schemes to reach completion.

City Hall framed the update as a recovery in the capital’s stalled housebuilding program,pointing to recent acceptances of SAHP offers by providers as evidence of renewed momentum. But the proclamation is likely to renew scrutiny from campaigners and opposition politicians who argue that extensions mask deeper problems in supply, affordability and the types of homes being delivered. As London moves beyond the missed deadline, attention will turn to delivery timelines, tenure mix and whether the completed homes meet the city’s need for genuinely affordable housing.

Mayor meets extended affordable homes target as City Hall says vast majority of new SAHP offers accepted

City Hall confirmed the mayor has met the revised affordable homes target after a deadline extension, attributing the result to an acceleration of Shared Affordable Housing Programme (SAHP) approvals and renewed developer engagement. Officials said the “vast majority” of new SAHP offers have been accepted, with delivery driven by a mix of infill and brownfield schemes, procurement flexibilities and targeted grant top-ups. Observers noted several immediate outcomes:

• Higher acceptance rates of SAHP offers across most boroughs;
• Renewed emphasis on family-sized and supported units to address waiting-list pressure;
• more schemes structured around long-term affordability covenants and blended finance.

A snapshot of recent borough-level activity illustrates the shift in pace and geography of delivery:

Despite the milestone, officials warn that hitting a headline target dose not remove structural challenges: planning bottlenecks, rising build costs and the need for sustained funding to keep homes genuinely affordable over the long term remain pressing priorities for the next administration.

Breaking down SAHP acceptance and delivery: regional variations, unit type shortfalls and financial bottlenecks

The GLA’s claim that the “vast majority” of new SAHP offers have been accepted masks a more complex geography. Acceptance rates are concentrated in inner London boroughs where land values and developer appetite push offers through, but those areas are skewed towards smaller units and one-bed flats, leaving a persistent shortfall of family-sized and wheelchair-accessible homes in outer and suburban boroughs. Planning constraints, land availability and local policy thresholds also produce stark contrasts: some growth corridors show high acceptance but long lead times to start on site, while others register low acceptance because viability tests and higher infrastructure costs dilute the affordability element. Key shortfalls include:

• Inner boroughs: high acceptance, predominately 1-bed units
• Outer boroughs: fewer accepted offers, greater need for 3+ bed family homes
• Special needs units: significant under-provision across most boroughs

Behind accepted offers, however, sit acute financial bottlenecks that threaten actual delivery.Rising build costs,shortened grant envelopes and developer viability renegotiations are creating a pipeline with growing “at risk” units – projects accepted on paper but increasingly dependent on top-up funding or cost-containment measures. The picture points to a need for targeted interventions: time-limited viability funding, stronger conditional monitoring of accepted offers and clearer risk-sharing agreements with developers to lock in unit mix and affordability. Practical fixes under discussion include staged grant releases tied to on-site milestones, prioritised funding for family and accessible homes, and a centralised dashboard to track pipeline slippage in real time.

Policy insights and accountability measures needed to close remaining gaps: tighter monitoring,conditional funding and transparent reporting

Delivering on the extended pledge exposed where oversight still falls short. To close those delivery gaps, london needs a much firmer framework that ties funding to verifiable progress and makes performance visible to the public. Practical interventions should include concerted, routine checks and transparent publication of results so councillors, tenants and journalists can track how many new social offer proposals translate into accepted tenancies. Key levers are:

• Self-reliant audits of allocations and affordability criteria at defined milestones;
• Milestone-linked payments so public money is released only as homes are delivered and tenancies signed;
• Live data dashboards showing offers made, offers accepted and lettings by borough;
• Resident verification channels so those offered homes can report discrepancies directly to City Hall;
• Clear sanctioning options for chronic under-delivery, including repayment clauses.

Accountability must be measurable and enforceable. that means standardised monthly reporting from housing associations and councils, independent spot‑checks, and public scorecards that compare pledge commitments against outcomes. Combining conditional funding with accessible, verified data will shift incentives from box‑ticking to delivery, and give Londoners the evidence to hold institutions to account.

Practical recommendations for the next mayoral term to secure quality and supply: strengthen allocations, support delivery partners and reform grant timelines

To lock in both quality and supply, the next mayor should prioritise multi‑year, ring‑fenced allocations that are explicitly linked to robust quality standards and delivery milestones. Funding should come with clear,published expectations on design,maintenance and net‑zero performance so that investment drives long‑term habitability,not short‑term completions. Practical steps include:

• Ring‑fenced multi‑year budgets for boroughs and housing associations to enable forward planning;
• Conditional allocations tied to quality indicators and post‑completion inspections;
• Transparent local delivery plans with published targets and performance dashboards.

These measures reduce stop‑start funding cycles, deter speculative shortfalls and make it easier for partners to scale up craft and contractor capacity while protecting tenants’ long‑term interests.

Equally urgent is reshaping support for delivery partners and reforming grant timelines so programmes move from annual campaigning to steady pipeline delivery. The mayor should simplify request processes, introduce multi‑year grant windows and offer underwrite or bridge funding for smaller providers to de‑risk projects and speed completions. Recommended actions include:

• Simplified, faster approvals with set decision times;
• Capacity grants and technical support for community builders and SME developers;
• Payment mechanisms that reward progress and completion, not just starts.

Together these reforms would give funding certainty, improve build quality and expand the pool of reliable delivery partners – essential if london is to convert pledged commitments into homes that last.

in summary

London’s achievement in reaching the affordable homes target – albeit after an extension – represents a milestone for the mayor’s housing agenda, and City Hall’s claim that the “vast majority” of new SAHP offers have been accepted suggests further progress down the delivery pipeline. But officials and campaigners alike caution that numerical targets are only the first step: scrutiny will now shift to when these offers turn into completed homes, the tenure mix, local distribution and long‑term affordability. With implementation now under the spotlight,developers,boroughs and housing groups will be watching conversion rates and timelines closely. As administration and opposition trade credit and critique, the true test will be whether London’s latest pledges translate into sustained, genuinely affordable housing on the ground.