GTC has been appointed by Barratt Redrow to deliver a fully integrated smart energy and utility infrastructure at Cosmeston Farm in Penarth, a development set to become the UK's largest net zero carbon housing scheme.

The 576-home project is expected to surpass the Future Homes Standard by deploying a comprehensive Smart Home system at scale. The development will integrate ground source heat pumps, smart energy controls, battery storage, solar power and GTC-operated electricity and water networks into a single system designed to reduce energy demand and lower household bills.

Cosmeston Farm forms part of a wider push toward sustainable housing and is considered one of the most significant residential green developments in Europe. The system will optimise energy usage across the site while enabling flexibility with the national grid and maintaining residents’ ability to choose their electricity supplier.

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As part of the project, GTC will monitor energy performance across all homes, collecting real-world data from heating systems, solar panels, batteries and network infrastructure. This data will be used to demonstrate that the development meets its net zero carbon operational targets.

The scheme has been supported from an early stage by GTC, which helped shape its technical and commercial strategy. Cardiff University will independently assess the project’s performance, aiming to establish a benchmark for large-scale net zero housing across the UK.

The development has also received backing from the Welsh Government as part of broader efforts to tackle climate change and accelerate the delivery of sustainable homes.

The Smart Home system at Cosmeston Farm will include shared ground source heat pumps providing low-carbon heating and hot water, advanced electricity and water networks, home battery storage to maximise renewable energy use, and smart monitoring systems to help residents manage consumption efficiently.

Under GTC's long-term ownership and operation model, residents will receive regulated utility services, including transparent billing and infrastructure designed for long-term resilience, with oversight provided by Ofgem.