According to the Treasury, mayors and regional leaders are also set to get greater powers and funding in Wednesday's announcement, while councils will be helped to borrow from government at preferential interest rates to invest in building homes. That is the part worth watching as closely as the headline number. Housing policy has a habit of arriving as a stack of promises, pots and process; what tends to decide whether anything gets built is whether local authorities can actually make the sums work.
The Treasury said an initial £285m in transitional seed funding will be allocated next year to support mayors and local leaders and reduce reliance on what it called "fragmented bidding pots" in Whitehall. It also said it would work with mayors to design a new £1.5bn borrowing facility from 2028, which could be used for local priorities including new homes, high streets and transport links.
For councils, cheaper borrowing is not a side note. It can be the difference between a scheme that exists in a cabinet paper and one that gets built. For residents stuck on waiting lists or priced out of private rents, the argument is less abstract still.
Chancellor John Healey said English cities and regions would get the "right to decide their own future". Prime Minister Andy Burnham said the plans were about ending the habit of local leaders going "cap in hand" to Westminster. The government says areas that are not yet strategic authorities will also be able to access a share of the £285m funding to unlock growth projects.
Some of the language here is familiar enough: more flexibility, more local power, less Whitehall micromanagement. Still, the package is not just rhetorical if the borrowing terms really do widen what councils and combined authorities can finance. London mayor Sadiq Khan said greater ability to invest could help unlock infrastructure projects including the West London Orbital route, the Bakerloo line extension, Docklands Light Railway works and the development of Stratford International station.
The Budget is also expected to include support for small breweries, and the BBC reports the Sunday Times has said further defence spending is likely to be unveiled. But on the domestic front, the housing announcement is the sharper test of whether ministers can turn a large programme total into homes that local government can actually deliver.
Alex de Valletta
Dua Mifsud
Isla Camilleri
Sophia Borg