The industry has expressed disappointment with the 6 per cent energy-efficiency requirements included in Part L of the updated Building Regulations.
Micropower Council chief executive Dave Sowden said the move would increase energy bills for new homes by around a third and reduce carbon savings by more than 75 per cent when compared with the previous government’s outlines.
Mr Sowden said the announcement “brings very little clarity and will not result in any material additional uptake of low-carbon energy technologies”.
The Heat Pump Association said the 2016 updated regulations will have to include a “massive” step to reach the zero-carbon stage by 2016, which will put strain on technology and training.
Homeowners will not benefit from lower running costs in the meantime, the HPA added, and the legacy will see these homes producing more carbon than necessary for the next 50 to 100 years.
But Federation of Master Builders chief executive Brian Berry said its surveys “indicate the cost implications for smaller developments will be significantly above those estimated by the government’s impact assessments”.