City of Cockburn, PO Box 1215, Bibra Lake DC, Western Australia, 6965
Telephone: (08) 9411 3444

Energy Efficiency Design Requirements for Residential Buildings Class 1 Buildings And Attached Class 10

Since 1 July 2003, all new residential dwellings and additions (Class 1 & 10a) have had to comply with the mandatory energy efficiency requirements as defined in the Building Code of Australia.

From 1 May 2006, the Building Code of Australia (BCA) 2006, has incorporated new energy efficiency provisions for the design and construction of all Class 1 single residential houses. However, the implementations of these new provisions were delayed until the 1st May 2007.

It is now mandatory to comply with these new measures and the major areas of change include new Performance Requirements and Deemed-to-Satisfy Provisions for the following aspects of single residential buildings:

  • Increased thermal performance of walls, ceilings, floors, glazing including shading in order to avoid or reduce the use of artificial conditioning (heating and cooling).
  • The sealing of buildings to reduce energy loss through air leakage. 
  • Natural ventilation and internal air movement, where appropriate, to avoid or reduce the use of artificial conditioning. 
  • The energy efficiency of hot water and air conditioning systems.

The requirement for sustainability when designing new residential buildings is constantly being reviewed at a national level.  The Building Code benchmark reqruirements are constantly under reveiw. Information in regard to the latest sustainability requirements can be found by utilising the link to the Western Australian Building Commission web site found on this page.  


In addition, these new measures affect all Class 2 to 9 buildings (Commercial, Industrial and Multi Residential), as defined in the Building Code of Australia. Information on energy efficiency for commercial buildings can be obtained from the Commercial Energy Efficiency webpage on the Citys website.

When submitting a building application to the City of Cockburn for new buildings or major additions to a building, (other than most Class 10) the application will need to meet the requried engergy efficiency/sustainabilty requirements.

Alternatively Certification from a Registered First Rate or NatHers energy efficiency assessor for the proposed design may be submitted.

Details in regard to registered First Rate or NatHers assessors can be found at the ABSA website




Documents to Download:

For further information on energy efficiency download the below document:

Helpful Information:

Need further information?

Contact Building Services
Tel: 9411 3444
Fax: 9411 3333