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Five star plus building standards from 1 September 2007: under $1,000 to $3,000; standard house costs paid back in savings in five years

Posted by gmarkets on 22 September, 2007

 The average cost of implementing the five star plus program to minimise energy consumption varied from under $1000 to about $3000 per new house, said Ljiljanna Ravlich, Minister for Local Government, in the Western Australian Leguislative Council on 14 August 2007.

Cost reduced through rebates: Quoting advice from the Department of Housing and Works, Ravlich said: “Stage 1 requirement will cost less than $1,000 for most houses. Stage 2 requirements are currently under development but are anticipated to be around $1,000 for an average house on a smaller lot. Larger houses or houses on lots with large landscape areas will be required to be connected to an alternative water supply such as a rainwater tank, on-site bore or a developer supplied third pipe. Water tanks and on-site bores cost in the range of $2,000 – $3,000, however, there are rebate incentives available that will reduce this cost.”

Pay-back calculations: “For a standard size house, the extra cost of compliance with the new standards will be paid back within five years,” the Minister said. “5 Star Plus has the potential to reduce water consumption in an average home by 100 to 140 kilolitres per year when compared to the Water Corporation Domestic Water Use Study 2001. 5 Star Plus is targeted at reducing greenhouse gas emissions rather than energy consumption. It is anticipated that the hot water heating component of 5 Star Plus will save an average of 0.5 Tonnes of CO2 per year per household. This is in addition to energy savings that can be obtained through the energy efficiency provisions of the Building Code for heating and cooling of homes.”

15m kilolitres of water, 475,000 tonnes of CO2 saved: “Over a 10-year period it is estimated that 5 Star Plus standards will result in water savings of 15 million kilolitres in new homes. In regards to greenhouse gas emissions associated with energy, it is estimated that the hot water heating component of 5 Star Plus will save approximately 475,000 Tonnes of CO2 over a 10 year period.”

Reference: Hon Paul Llewellyn, Member for South West, AG, Hon LJILJANNA RAVLICH, Minister for Local Government representing the Minister for Housing and Works, Member for South Metropolitan, ALP, Legislative Council of Western Australia, Hansard, 14 August 2007. A copy of these proceedings can be accessed at

Erisk Net, 22/8/2007

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