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House Energy Ratings


In Tasmania, all houses built since 2003 have been required to be energy efficient.

In 2014, the requirements became even more stringent. Since that year, six stars have been the mandatory minimum, in line with the National Construction Code.

The maximum rating a building can achieve is 10 stars.

To achieve the minimum six stars, or aim for the ultimate 10 stars, you will need the services of a qualified assessor.

Hobart Building Assessment Services is accredited as a thermal performance assessor with the Building Designers Association of Victoria.

HBAS can audit, assess and certify to satisfy current 6-star energy efficiency requirements under the Building Code of Australia.

We conduct house energy ratings throughout Tasmania and Australia-wide.

A house energy rating highlights areas of thermal inefficiency. This allows for changes in design to comply with the National House Energy Rating Scheme (NatHERS).

What types of buildings do the “6-Star” requirements apply to?


  • All Class 1 buildings (detached houses, units or town houses),
  • All Class 2 buildings (any building containing two or more sole-occupancy units, each being a separate dwelling),
  • All Class 4 buildings (a dwelling in a building that is a class 5,6,7,8 or 9, if it is the only dwelling in the building).

The 6-Star requirements also apply to new work on existing residential buildings. This includes additions, extensions and alterations.

Big changes of the six-star system

The main requirements of the new system are:

  • More insulation around the entire conditioned space, for higher resistance (R) values,
  • Better glazing to prevent heat loss through windows and glass doors,
  • Ceiling insulation to compensate for exhaust vents, downlights and similar openings in the roof.
  • Energy-efficient fixed lighting.

An accredited assessor can help you pinpoint all these problems and more

Contact us  to discuss the options.



Call us now on : 0407 796 978 or Get a free quote
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