They are designed to have a continuous airtight outer shell. Leakage through any gaps must be less than 0.6 of the total house volume, per hour, at 50 Pascals pressure. This rate is known as Air Changes per Hour (ACH50), measured in a process known as a blower door test.
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McLaren has partnered with consultant Beyond Carbon to integrate Passivhaus principles for 71 out of the 188 new homes. The construction company estimates that this will help reduce energy consumption in the 71 homes by 70%.
Map showing the Steyne Estate in Acton, West London (Image: Karakusevic Carson Architects)
The homes, in the Steyne Estate, Acton, will be spread across three buildings with a mix of London Affordable Rent (LAR), shared ownership and market price flats.
The 71 LAR and 90 shared ownership homes have received over £16m of grant funding from the Greater London Authority.
London region managing director at McLaren Construction, Darren Gill, said: “We’re delighted to be able to integrate Passivhaus design for sustainable living on this scheme. Integrating affordability and multi-generational living on the same project is visionary from Ealing Council and we look forward to bringing this to life.”
The November/December 2025 issue of Construction Management magazine is now available to read in digital format.
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CM, in partnership with IPAF, has launched a new survey to explore the industry’s views and experiences with powered access machines on construction projects.
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