6-star energy rating

There are energy efficiency standards that apply to:

  • new homes
  • relocated homes
  • alterations and extensions to existing homes. 

New homes

From May 2011 all new homes must have:

  • a 6-star energy rating for the building envelope (roof, walls, floor and windows)
  • a rain water tank for toilet flushing, or 
  • a solar hot water system. 

Relocated homes and alterations to existing homes

The 6-star energy standard applies to all relocated homes and alterations/additions to existing homes. 

Alterations/additions or relocations must have a 6-star energy rating for the building envelope. 

There is no requirement for:

  • a solar hot water system, or
  • a rainwater tank for toilet flushing. 

Large alterations

When your extension represents more than 50% of the original volume of the existing building (including any alterations carried out in the previous 3 years), the existing building must be brought up to the same standards as the new construction (that is 6-star energy rating).

Smaller extensions

When your extension represents more than 25% of the existing building’s floor area, or 1,000m2 (whichever is less) the extension must fully comply with the new standard.  

For alterations and extensions there are certain circumstances where the relevant Building Surveyor has discretion to allow partial compliance where any requirement is:

  • ·overly onerous
  • technically impractical
  • does not provide a level of benefit commensurate with cost. 

Energy Raters

Your building plans will need to be reviewed by an Energy Rater, accredited with Sustainability Victoria, to assess whether they comply with the 6-star energy rating. 

Contact Maroondah City Council Building Services for further information on 9298 4327