Energy-efficiency: building code star rating: what’s optimal, what’s not?

25 Nov 2010 publication

Residential building energy star ratings are widely perceived within the community to be a measure of economic efficiency. A higher star rating is perceived as innately desirable. However, energy efficiency is not economic efficiency. Findings in this report are that, generally it pays to achieve a 5-star rating for new houses. However, above this point, for most houses in Melbourne, Sydney and Brisbane (representing 80 per cent of Australian city residential houses), forcing home owners to build houses with higher star ratings will be detrimental to the community.

View report online [pdf, 1602KB]