Question to the Ministry of Housing, Communities and Local Government:

To ask the Secretary of State for Housing, Communities and Local Government, what steps she plans to take to ensure that the 60% of affordable homes provided through the new route at social rent are not renegotiated out at a later stage in the development process.

On 23 October 2025, the Secretary of State and the Mayor of London announced a new package of support for housebuilding in London. Details can be found on gov.uk here. A consultation on these London-specific measures will be launched in November 2025.

The package includes a new, time-limited planning route, which will sit alongside the Greater London Authority’s existing Fast Track and Viability Tested routes. This new route is designed to encourage schemes to come forward, and existing schemes to progress, in the near-term, in order to support a rapid recovery in housing delivery.

In order to access this time-limited route, schemes will be required to provide at least 20 per cent affordable housing, with a minimum of 60 per cent social rent (and the rest intermediate tenures in line with London Plan policy). Boroughs will be expected to consider applications that meet these minimum levels. This route will be available until 31 March 2028 or the publication of the revised London Plan, whichever is earlier. All planning decisions on applications will need to have been issued by the local planning authority by the deadline.

A gain-share review mechanism will be applicable where construction on the scheme has not reached a fixed milestone by the end of March 2030 – meaning that if additional returns result from improved market conditions, these benefit fairly both the developer and the community.

Any proposed reductions in affordable housing will be subject to full viability assessment and will no longer be eligible for the time limited planning route. In this case a review would then apply regardless of whether the delivery milestone was met to determine whether additional affordable housing contributions can be provided if viability improves over the lifetime of the development.

In respect of existing schemes, the GLA encourages partners to deliver affordable housing in excess of 20 per cent where possible, especially where planning consents are in place, and will make grant available at or above the announced benchmark grant rates for such projects where it provides value for money to do so. Projects consented at 35 per cent or more affordable housing, that are currently stalled due to viability reasons, are encouraged to assess the availability of grant where this is needed to support delivery and to increase the level of affordable housing above this. For bids providing less than 35 per cent affordable housing, where the grant requested is higher than the said benchmarks, the GLA will require Additionality Viability Assessments to be undertaken. In all cases, the GLA will undertake checks to ensure that any grant allocated is compliant with subsidy control rules