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BASIX Assessments

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BASIX Reporting Services

We conduct BASIX Assessments to ensure your units are BASIX-compliant, help you reduce your carbon footprint, cut down on utility bills and contribute to achieving a sustainable future.

Our experts will ensure that your project is correctly assessed so that you can gain the certification you need to begin.

Our Service Coverage

BASIX assessment applies to Wollongong, Sydney and the rest of New South Wales. BASIX assessment is mandatory for all kinds of residential dwellings and developments.

To help you fulfil all BASIX requirements, we provide assessment services that cover:

  • New single-dwelling homes
  • Dual occupancies
  • Multi-dwelling units and apartments
  • Alterations or additions (renovation) with an estimated minimum value of $50,000
  • Swimming pool or spa installations with a capacity of at least 40,000 litres
  • Australian Building Sustainability Association (ABSA)/National Home Energy Rating Scheme (NaTHERS) energy rating certification
  • Sustainability advice and recommendations

BASIX/ NatHERS – All You Need to Know

Introduced way back in 2004, the objective behind the Building Sustainability Index (BASIX) is to bring about the reduction of water consumption and greenhouse gas emissions in New South Wales. The scheme was implemented in Australia under the Environmental Planning and Assessment Act.

BASIX has set sustainability goals concerning water and energy and minimum performance requirements regarding each proposed development’s capacity to provide thermal comfort to residents.

BASIX encompasses all types of residential dwellings and is a critical requirement in the development application process in New South Wales. Building and development proposals cannot be lodged with a council without a BASIX assessment. Therefore, all residential building owners must submit their proposed development design for BASIX assessment.

When your design is established to be BASIX-compliant, a BASIX certificate in PDF format is generated online through the New South Wales Government’s Department of Planning and Infrastructure website. The BASIX certificate is attached and submitted during the development application (DA) stage for project approval by the relevant council. It is also required to issue a construction certificate (CC) and final inspection.

However, if the results of the BASIX assessment show that your proposed design is not BASIX-compliant, whether due to conflicts with heritage controls or because the new technology included with the design is not acceptable to BASIX, you may request an alternative evaluation.

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Our Technology and Equipment

For single dwellings in coastal New South Wales, BASIX targets typically concern the following:

  • The reduction of potable water use by 40 per cent
  • The reduction of greenhouse gas emissions by 50 per cent

Although the benchmark is New South Wales, these targets are adjusted to address regional climate variations. These can be changed over time to fulfil each state’s water and greenhouse gas savings goals.

The variability of targets based on specific local conditions (e.g., soil type, rainfall, evaporation rates) and residential types (e.g. high-rise apartments, single detached houses, etc.) guarantees the equitable implementation of BASIX standards of compliance across New South Wales.

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Regular BASIX Assessment Project Types

The site details page of BASIX requires assessment applicants to enter the following information:

Single dwelling developments

  • Site area
  • Area of the roofing structure
  • Total number of storeys or floors
  • The floor area of the conditioned section of the development
  • The floor area of the unconditioned section of the development
  • Area of the garage
  • Area of the mezzanine section
  • Data on whether a swimming pool and or outdoor spa is to be installed. Information on indoor spas, including spa baths, is not needed.

Multi-dwelling developments

  • Site area
  • The total area of the roof (applies to all buildings)
  • Area of the non-residential floor
  • Total number of car spaces for residents
  • Total number of non-residential car parking spaces

Specific details of common areas to be included on the common areas page. However, BASIX only requires details for underground or covered communal car park areas.

These include an underground communal car park and undercover communal carports. Private garages/carports located above-ground and open-air carparks are excluded.

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