A report commissioned by Building says a 2.5% increase in rents could make new-build offices 25% more energy efficient than the current version of Part L of the Building Regulations.

The report is in the Learning the New Rules supplement, published with this week’s Building, and prepared by cost consultant Davis Langdon with service engineer Hoare Lea and property consultant Cluttons.

It lists a range of measures that developers can incorporate into new buildings to improve ratings when energy certification is introduced.