The RIBA is urging the government to launch a national retrofit programme to insulate all Britain’s interwar homes, saying it can no longer afford to side-line the issue of decarbonising housing.

The institute said to improve all homes that currently have an EPC certificate of C or below would cost £37.5bn – or £11,379 per home.

The RIBA is focusing on the 3.3 million homes built between the wars because they are among the worst insulated and the most easily improved.

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