The development of new housing is under threat from the Planning and Energy Bill, according to the Home Builders Federation.
John Slaughter, director of external affairs is worried that by extending the Merton Rule, the bill will make life far more difficult for developers.
"Our point of view is that it prevents the delivery of new housing, and in the process will result in fewer environmentally-friendly houses rather than more," he said.
In his opinion, the Planning Policy Scheme provided enough guidance. He explained that the micro-generation of energy should be applied "where appropriate" in new developments because each build is different.
"We’re concerned that [the Bill] could lead to unnecessary costs and maybe not the most efficient technical solutions in particular cases," he said.
Developers of commercial property in London often use mixed-use designs so they can include office space, residential property and affordable houses.
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