The third Green Building Masterplan will not just target new and existing buildings.
People working or living within premises, and right down to the devices they use, might also be evaluated by the Building and Construction Authority (BCA) under its new plan, which is due to be out later this year.
BCA chief executive John Keung said the broader focus is to get more people involved in greening efforts.
"We are not just looking at a simple change in the lighting (in the office), we might also look at your laptop, to make it as energy-efficient as possible," he said yesterday on the sidelines of the inaugural World Engineers Summit at Marina Bay Sands.
He estimated that about half of the energy consumption of a typical office building can be traced to its tenants.
The expanded focus of the new masterplan is a marked change from the previous two, which had largely targeted physical infrastructure.
In the second green masterplan that was launched in 2009, for instance, developers could secure additional gross floor area if they achieve a higher green mark rating.
That masterplan also introduced a $100 million fund to give out cash incentives to existing building owners who retrofit their premises to meet specific greening criteria.