Residents at an office-to-housing conversion in Cardiff Bay will be connected to the city’s heat network and billed for their energy through Sero
Scott Harbour, once an office building in Cardiff Bay, is being given a new lease of life. Cardiff Council has transformed the space into 78 modern apartments, helping to increase the supply of affordable homes in the city.
The first 33 apartments welcomed residents in July, and the remaining homes are expected to be ready in early 2026. These apartments offer a mix of one, two and three-bedroom layouts, designed to feel bright and spacious, with large windows and, in many cases, beautiful views across Cardiff Bay. The project also includes improvements to the surrounding area and a new ground-floor office space.
All homes will be let as permanent council tenancies, with most designed for families. To make sure the development benefits the local community, a special lettings initiative is in place for Butetown residents. This includes supporting families who are currently overcrowded and helping households downsize, freeing up larger homes for those who need them most.
Scott Harbour is connected to Cardiff Council’s innovative district heat network, which provides a low-carbon source of heating and hot water. The network captures heat from steam produced as a by-product of electricity generation at Viridor’s Trident Energy Recovery Facility. This heat is then delivered through insulated pipes to buildings across Cardiff Bay, including Cardiff and Vale College, Wales Millennium Centre, the Senedd, and Scott Harbour.
The apartments will also benefit from Solar PV, helping to reduce carbon emissions and energy costs.
As part of the heat network, residents will receive billing for their heat and hot water through Sero. Cardiff Council chose Sero following the successful rollout of their energy-as-a-service solution at Addison House, a community living scheme in Rumney. This approach ensures residents have clear, fair billing while supporting Cardiff’s move toward a more sustainable future.
James Williams, chief executive of Sero, said: “This project is another great example of how Cardiff is innovatively tackling both climate change and the housing crisis the capital faces.
“We’re delighted to have been chosen for this project and to continue working in partnership with Cardiff on their forward-thinking sustainable housing initiatives.”
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