Recommendation 20

The National Audit Office found that neither the Department nor Homes England modelled the potential costs of needing to retrofit homes built under the 2021 programme, to meet net zero standards.50 The Department said that the future homes standard, when it is introduced from 2025, will mean that homes after this date will not need to be retrofitted.51 The G15 group told us that the future homes standard will add at least £5,000 to the cost of a new home and that existing social housing stock will require wholesale regeneration. The G15 group and Business London warn that retrofitting existing stock will increase strain on funding and resources, potentially limiting new supply.52 Transparent reporting of progress