UK’s largest net zero housing development to be delivered in Wales

The site, known as Cosmeston Farm in the Vale of Glamorgan, will see the delivery of 576 new homes that will achieve net zero carbon 'through innovative design and technologies'- according to the Welsh Government

Once built, it will be the UK’s largest net zero carbon housing development
Author: George SymondsPublished 4th Oct 2025

The site, known as Cosmeston Farm in the Vale of Glamorgan, will see the delivery of 576 new homes that will achieve net zero carbon 'through innovative design and technologies'- according to the Welsh Government.

Net zero housing developments aim to create homes that produce as much energy as they consume, with the aim of reducing carbon emissions .

Cardiff University has been appointed to independently assess and verify data that monitors zero carbon performance of the homes.

50% of the homes will be affordable, with 219 set to be available for social rent:

The development will also include a new primary school, open space and an active travel route, creating a comprehensive sustainable community.

Cabinet Secretary for Housing and Local Government, Jayne Bryant, said:

"This landmark development sets a new standard for sustainable housing not only in Wales but across the UK and beyond.

"This isn't just about building homes - it's about creating thriving communities and tackling the climate emergency head-on.

"Our net zero policy is driving real investment and real change in how we build the homes Wales desperately needs."

"It will be an exemplar development and a great place to live"

David Thomas, Chief Executive of Barratt Redrow (who will be building the houses), said:

"As one of the leading housebuilders in Wales we are proud to be working with the Welsh Government to build the largest net zero new community in the UK.

"It will be an exemplar development and a great place to live, with fantastic community facilities, a strong commitment to affordable housing, and cutting-edge sustainability credentials.

"Every highly energy efficient home will be heated by a ground source heat pump and powered by photovoltaic panels and batteries, cutting carbon and bills for future residents."

Once built, it will be the UK’s largest net zero carbon housing development and believed to be one of the biggest in Europe.

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