June delivered two slowdowns - one on the high street (the estate agents’ windows, not the shops) that made the headlines, and one on the building site that barely got a mention. Why is the second slowdown the one to build your investment strategy around?

The one they noticed: UK sales agreed fell 9.4% against last June (per TwentyEA’s whole-of-market data - more on which below), mortgage approvals printed their weakest number since December 2023, and the market is, depending on your paper, somewhere between “wobbling” and “collapsing”. The one they largely missed: the people who build the homes have quietly stopped buying the land to build them on. Not slowed. Stopped. The receipts - Berkeley’s accounts and the HBF’s survey - follow below. From the FTSE-listed top of the industry down to the five-unit local firm, the capital decision of summer 2026 is the same: down tools, sit on hands, wait.

The case I want to make: the second slowdown is the one that matters, because the first is weather and the second is climate.

Let’s do the construction data properly, because “slowdown” flatters it.

May’s S&P Global construction PMI printed 38.2 - the steepest fall in activity since May 2020, when the industry was locked down, and, excluding the pandemic, the worst month since March 2009.

June’s reading “improved” to 38.4 - the eighteenth consecutive month below the 50 line that separates growth from contraction, with housebuilding slipping again to 35.9, the weakest major category.

Sit with that: GFC-grade output falls, month after month, in the sector supposed to be delivering 300,000 homes a year. The official data tells the same story under the bonnet. April’s ONS construction output “grew” 0.1% - and every scrap of it came from repair and maintenance, up 0.6%, while new work fell 0.3%.