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Showing posts from April, 2025

How Section J Requirements Differ Between Australian States

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  If you are building a commercial property anywhere in Australia, NCC BCA Section J compliance is a legal requirement, not a choice. It sets energy-efficiency standards that every new commercial building must meet before it can be approved. The core rules are national, but each state adds its own twist, and missing those local variations causes costly delays.  Here is how Section J works, and where the states differ. What Is Section J? Section J is the energy efficiency chapter of the National Construction Code. It applies to commercial building classes 3 and 5 through 9, covering offices, hotels, shops, warehouses, schools, and hospitals. The rules were tightened significantly in NCC 2022. There are now two mandatory performance requirements, and a new 7-star thermal standard applies to certain dwelling types. Every project must prove compliance through a formal NCC BCA Section J report before a Construction Certificate is issued. Is It Mandatory Everywhere? Yes. Section J...

The NatHERS Existing Homes Scheme: A New Tool for Energy Ratings

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Australia’s housing landscape is undergoing a transformative shift with the expansion of the Nationwide House Energy Rating Scheme (NatHERS ) to include existing homes.  This landmark initiative, set for full rollout by mid-2025, aims to improve energy efficiency, reduce household costs, and support Australia’s transition to net-zero emissions.  For homeowners, renters, and industry professionals, this marks a pivotal step toward sustainable living. Let’s explore what this expansion entails, its implications for NatHERS assessors, and how it interacts with existing frameworks like BASIX. Why NatHERS for Existing Homes Matters? Most Australian homes were built before modern energy standards, with over 10.8 million dwellings averaging below three stars in energy performance.  The new NatHERS Existing Homes Scheme addresses this gap by introducing standardised energy assessments that evaluate a home’s thermal performance, fixed appliances (e.g., heating/cooling systems), a...