Non-compliance with Part L of the Building Regulations could undermine efforts to make homes more energy-efficient, according to a report by the National Audit Office (NAO).
The Programmes to reduce Energy Consumption report, published earlier this week, examined the effectiveness of the £2.6 billion the Government spends every year trying to increase energy efficiency and reduce household energy consumption.
It found that there was a growing recognition that non-compliance was a potential problem. The findings echo those of trade associations, manufacturers and installers, who say not enough is being done to enforce Part L of the Building Regulations.
The report said the Department for Communities and Local Government was now undertaking a review of compliance in partnership with the Energy Efficiency Partnership for Homes (EEPH), but stressed this issue needed to be made a priority.
An extract reads: 'This work needs to be concluded and continued and convincing proposals made to address the issues. The results of this project must be used to inform future amendments to the Regulations and support more realistic estimates of impact. This will be especially important since future Regulations are expected to be more stringent and non-compliance correspondingly more likely.'
Tim Burr, head of the National Audit Office, said: 'There are encouraging signs the long-term growth in household energy consumption is reversing. If targets are to be met, departments need to improve their understanding of how programmes are working in real homes and how householders are responding to them.'