Willmott Dixon's social housing division Inspace has transformed a 1930s built family home in Barnsley as part of an experiment to achieve low carbon thermal efficiency and cut heating bills by up to half.

Inspace kitted the house out with new materials and technologies designed to turn it from an E rating in environmental impact and energy efficiency to an A rating.

They have predicted that the solar hot water, cavity wall insulation, new gas boiler, internal insulation and double glazing could see £477 cut from the annual gas bill.

Inspace managing director for innovation and sustainability Brendan Ritchie commented: “Tackling energy efficiency on older housing stock will become a major priority and companies like Inspace will have to show how this can be done affordably.”