A. In August 2022, all Building Ministers agreed to increase the minimum thermal performance rating from the equivalent 6 to 7 stars (out of 10) under NatHERS.

For NSW, from 1st October 2023, all new home builds and renovations costing more than $50,000 must have a 7 star energy rating under the state’s Building Sustainability Index (BASIX), up from 5.5 stars. A higher energy rating aims to slash greenhouse gas emissions from new residential dwellings by a further 7-11%. These new BASIX thermal performance and energy standards will apply to all new residential buildings across NSW except for:

• homes in NatHERS Climate zones 9,10 and 11  on the north coast of NSW

• small apartment buildings up to 5 storeys in NSW

Larger apartment blocks must meet an average of 7 stars across the building and a minimum of 6 stars for each individual apartment.

A. The price is determined on a project by project basis and will be based on design complexity, house size, number of dwellings. Once we receive your house plans, a fixed price will be provided.

A. Introduced by the NSW Government, BASIX (Building Sustainability Index), ensures homes are designed to use less water and be responsible for fewer greenhouse gas emissions by setting energy and water reduction targets for houses and units.

It is a mandatory component of the development approval process in NSW under the Environment Planning and Assessment Act 1979. Therefore, all Develeopment Applications must be accompanied by a BASIX Certificate which confirms compliance with BASIX requirements.

A. In order to undertake a NatHERS thermal assessment, the following information is required:

• Architectural plans (including site plan, floor plans, elevations and sections)
• Construction material details
• Window schedule

Please email your architectural plans in pdf format to: enquiries@sustainablethermalsolutions.com.au