Skip to content


BASIX

The Building Sustainability Index, BASIX, is a scheme designed to reduce greenhouse gasses and water consumption. It was introduced by the NSW state government in the form of a State Environmental Planning Policy (SEPP).

From July 1, 2004 all new detached and single attached houses are required to reduce water consumption by 40% and energy consumption by 25%. Additional reductions will be phased in for various housing types over the next several years.

From 1 July 2006 a BASIX certificate will be required to be lodged for all alterations and additions to existing dwellings. The following activities trigger the need to get a BASIX certificate:

  • Extensions/modifications to living areas or wet areas
  • modification to the fabric of a building
  • new pools & outdoor spas
  • new hot water systems and airconditioner (AC) units.

A BASIX Certificate is only required where these works above require a DA. In many instances Council requires a DA for airconditioner (AC) units in Conservation areas/heritage affected areas.

The BASIX requirements do not apply to:

  • new garages/carports
  • new outdoor/open structures
  • pergolas/verandahs/awnings where they are the only thing being constructed.

The BASIX website, from the Department of Planning (DOP) includes:

  • the BASIX tool for detached and single attached dwellings (with supporting help notes and design guidelines),
  • the draft legislation enabling BASIX,
  • and detailed practice notes for key stakeholders including residential developers, consent authorities and certifiers,
  • plus the details and whereabouts of ongoing briefing and training sessions.

Council Support

The planting of Australian native plants can input into the BASIX score, and North Sydney Council's Native Havens Program can help, plus it has the list of the right local native plants to choose: