NSW splits building energy rules three ways: BASIX for the dwellings, a NSW version of Section J for the rest, and the SEPP for larger non-residential projects. We prepare the Section J reports and map where each rule applies. Checked 1 November 2026.
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NSW varies Section J: NSW Part J1 replaces Part J1, and NSW variations apply in other Parts too. BASIX regulates the thermal performance of Class 2 sole-occupancy units and Class 4 parts, so NSW J1P2 and J1P3 do not apply, and the BASIX certificate version sets which Section J edition applies to a Class 2 building. Every other classification, including Class 3 hotels, is assessed under NSW Section J. Larger non-residential projects also meet the State Environmental Planning Policy (Sustainable Buildings) 2022.
We prepare the Section J part of that picture, Deemed-to-Satisfy or J1V3, and map where BASIX and the SEPP take over. For the detail behind each rule, read our article How NSW varies NCC Section J.
NSW adopts NCC 2025 on 1 May 2027 (ABCB adoption information). Before then, NSW projects are assessed under NCC 2022 as varied for NSW. Your certifier confirms the edition for your application.
For a Class 2 building or Class 4 part, the NSW notes in NCC 2025 tie the Section J edition to the BASIX certificate. Version 3.0 or earlier, and Alterations and Additions certificates: NSW Section J of NCC 2019 Amendment 1. Version 4.0 or later: Section J of NCC 2022 Amendment 2.
Under NCC 2025, NSW J1P1 caps hourly energy and emissions for conditioned space: 40 kJ/m².hr and 4 g CO2-e/m².hr for Class 6; 22 kJ/m².hr and 2.2 g for Class 5, 7b, 8 and 9a (other than ward areas) and Class 9b schools; 8 kJ/m².hr and 1 g for other classes.
NSW J1P4 in NCC 2025 requires features that make it easier to add on-site renewable energy, energy storage and electric vehicle charging equipment later.
NSW Planning says the non-residential standards in Chapter 3 of the SEPP took effect on 1 October 2023. They apply to new non-residential development with an estimated development cost of $5 million or more, and to alterations for non-residential use costing $10 million or more. Land use zone exemptions are listed in the SEPP.
Source: NSW Planning, sustainability standards for non-residential development.
Façade, roof, glazing, air-sealing, services and monitoring checks against the NSW variations, with the edition and clauses cited for your certifier.
Reference building modelling under NSW J1V3 when Deemed-to-Satisfy is too restrictive for the design.
A clear split of which parts go to BASIX and which go to Section J, so the BASIX assessor and the Section J report don't overlap or leave gaps.
Embodied emissions quantification for life-cycle stages A1 to A3, for the development application and construction certificate.
We list every classification on the project and mark which parts are BASIX and which are Section J.
We check the BASIX certificate version for Class 2 parts and confirm the NCC edition with your certifier for the rest.
We run the Deemed-to-Satisfy checks or the NSW J1V3 model and prepare the report.
We answer certifier queries and coordinate with the BASIX assessor and the SEPP reporting.
Timing: Timeframes confirmed at quote; fast-track available for urgent projects.
Not to the apartments themselves. NSW J1P2 and J1P3 do not apply in NSW because the thermal performance of Class 2 sole-occupancy units and Class 4 parts is regulated by BASIX. Other classifications in the same building, such as retail or car parking, follow NSW Section J.
No. The ABCB's NSW Part J1 notes say Class 3 buildings are not subject to BASIX, so they are assessed under NSW Section J.
On 1 May 2027 (ABCB adoption information). Until then, NSW projects are assessed under NCC 2022 as varied for NSW, subject to your certifier's confirmation.
It follows the BASIX certificate. Version 3.0 or earlier, or an Alterations and Additions certificate: NSW Section J of NCC 2019 Amendment 1. Version 4.0 or later: Section J of NCC 2022 Amendment 2.
NSW Planning says Chapter 3 applies to new non-residential development of $5 million or more and alterations of $10 million or more, with zone exemptions. The energy and water standards apply to large commercial development such as offices over 1,000 m² NLA.
Yes. NSW keeps its own J1V3. We model the proposed building against the reference building, including the 97% greenhouse gas test, the services test, the thermal comfort or zone-load criteria and Specification 33.
Yes. We're based in Melbourne and work on projects Australia-wide. Each report uses the NSW variations and the edition your certifier confirms.
Timeframes are confirmed at quote, and fast-track is available for urgent projects.
We assess against NSW Part J1 and cite the NSW clauses, so your certifier isn't left to translate.
We map the classifications early so nothing is assessed twice or missed.
Our founder, Kelvin Mureithi: Green Star Accredited Professional, ISAP and Engineers Australia member.
We are based in Melbourne and work with design teams Australia-wide.
Reviewed by Kelvin Mureithi, Founder, Makao · Green Star Accredited Professional, ISAP, Engineers Australia member. Rules checked against ABCB and state government sources on 1 November 2026.
