From 23 August 2026 English mayors outside London can step in on large housing and commercial projects and tap a £3 bn funding package that is intended to speed up new homes and jobs, the UK government announced in a press release titled “Mayors given powers to green light developments”.
What the new call‑in powers cover
The announcement sets three clear size thresholds that trigger the new “call‑in” powers. A planning scheme that proposes more than 150 homes, more than 15,000 square metres of commercial space or any building taller than 30 metres (roughly ten storeys) can be taken over by the relevant mayoral combined authority. The thresholds are described as “national” in the release and apply to every English mayoral area that is not part of Greater London.
When a scheme crosses any of those limits, the mayor can “call‑in” the application, meaning the mayor’s office can make the final decision instead of the local planning authority. The press release also says mayors will be able to grant up‑front permission for development, allowing them to approve projects before detailed plans are submitted.
How the £3 bn funding is split
Alongside the planning powers, the government has earmarked a total of £3 billion for the seven most established mayoral combined authorities. The money is divided into three streams:
- £1.3 billion for land acquisition and infrastructure works.
- £234 million for brownfield site redevelopment.
- £1.5 billion committed through the Housing Accelerator Fund, which is designed to accelerate the delivery of new homes.
All three figures are tied to the 2026 allocation and are sourced from the same UK Government press release.
| Item | Value | Unit | Period | Source |
|---|---|---|---|---|
| Housing threshold | 150 | homes | current policy announcement (2026) | UK Government – Mayors given powers to green light developments |
| Commercial space threshold | 15,000 | square metres | current policy announcement (2026) | UK Government – Mayors given powers to green light developments |
| Height threshold | 30 | metres | current policy announcement (2026) | UK Government – Mayors given powers to green light developments |
| Land and infrastructure funding | 1.3 | billion GBP | allocated to seven established mayoral areas (2026) | UK Government – Mayors given powers to green light developments |
| Brownfield funding | 234 | million GBP | allocated to seven mayoral combined authorities (2026) | UK Government – Mayors given powers to green light developments |
| Housing Accelerator Fund commitment | 1.5 | billion GBP | committed for devolution (2026) | UK Government – Mayors given powers to green light developments |
Why the changes matter for local housing and jobs
For households, the ability of a mayor to intervene in schemes that exceed the thresholds could speed up the approval of larger housing blocks. A development of 200 homes, for example, would now be reviewed at the mayoral level rather than being delayed by a local council’s planning process. Faster decisions can translate into earlier construction starts, which in turn may help ease the pressure on house prices in regions where supply has lagged behind demand.
The £1.3 billion earmarked for land and infrastructure is intended to address two of the biggest cost drivers for developers: the price of acquiring suitable sites and the expense of building roads, utilities and public transport links. By reducing those upfront costs, the funding could make projects that were previously marginally viable become financially attractive, potentially unlocking new jobs in construction, engineering and related services.
The £234 million brownfield allocation targets sites that have previously been used for industry or other non‑residential purposes. Turning such sites into homes or mixed‑use neighbourhoods can bring regeneration to areas that have seen economic decline, while also limiting the need to build on greenfield land outside towns.
Finally, the £1.5 billion Housing Accelerator Fund is described as a “devolution” commitment, meaning the money will flow directly to the mayoral combined authorities rather than through central government departments. That direct line of funding gives local leaders more control over how quickly they can commission new builds, whether through public‑private partnerships, council‑led schemes or other models.
What remains unclear
The press release does not detail the exact mechanism by which mayors will access the three funding streams. It says the £1.3 billion “has already been allocated” to the seven most established mayoral areas, but it does not explain whether the money is released in tranches, tied to specific project milestones, or subject to additional local matching contributions.
Similarly, the criteria for awarding the £234 million brownfield funding are not spelled out. The release confirms the amount is “allocated to the seven mayoral combined authorities”, but it does not say whether each authority receives an equal share or whether the distribution will be based on the number of brownfield sites each area can demonstrate.
Another open question is how the new call‑in powers will interact with existing national planning policy statements and the National Planning Policy Framework. The release states that mayors will be able to “take the most important planning decisions in their areas”, but it does not clarify whether a mayor can override a decision that has already been granted by a local council or whether the mayor must still consult the Secretary of State for certain types of development.
Finally, the announcement does not provide a timeline for when the first projects might benefit from the funding. While the press release is dated 23 August 2026, the rollout of the funding and the operationalisation of the call‑in powers could take months, meaning households and developers may not see the impact until 2027 or later.
Overall, the government’s package is a concrete step toward giving English mayors outside London a stronger hand in shaping the built environment and a sizeable pool of money to back those ambitions. How quickly the powers translate into new homes, jobs and regenerated neighbourhoods will depend on the details that are yet to be published.