A report commissioned by Ðǿմ«Ã½ 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 Ðǿմ«Ã½ Regulations.

The report is in the Learning the New Rules supplement, published with this week’s Ðǿմ«Ã½, and prepared by cost consultant Davis Langdon with service 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.