Unlock the secrets behind NatHERS assessments and discover why energy efficiency is a game-changer for new homes in Australia.
A Nationwide House Energy Rating Scheme (NatHERS) assessment measures the thermal performance of a residential building. This assessment evaluates how well a home's design helps maintain comfortable internal temperatures throughout the year, with minimal reliance on artificial heating or cooling. Certified assessors use sophisticated modelling software to analyse the building envelope—including walls, roof, windows and floors—alongside orientation, insulation and ventilation.
The primary objective of a NatHERS assessment is to ensure that a new home meets or exceeds current energy efficiency standards mandated by regulatory authorities. By quantifying heat gains and losses, the assessment provides a detailed picture of a dwelling's energy demand, supporting compliance with the National Construction Code (NCC) and promoting long-term environmental sustainability.
NatHERS uses a star rating system, ranging from 0 to 10 stars, to communicate the energy efficiency of a home’s thermal performance. A higher star rating indicates superior energy efficiency, which translates to lower heating and cooling energy requirements, reduced utility costs and improved occupant comfort. In most jurisdictions, a minimum 6-star rating is required for new homes, though some regions are moving toward even higher standards.
The star rating is determined through computer simulation, which models the interaction between building materials, design features and local climate data. Factors such as insulation levels, window placement and thermal mass are all assessed to predict the home's ability to passively regulate temperature. This objective, standardised approach ensures transparent benchmarking across different designs and construction methods.
A NatHERS assessment is mandatory for all new residential developments in Australia, as well as for major renovations or extensions that impact the building’s energy performance. Property owners, developers, architects, and builders must obtain a compliant star rating certificate before planning approval can be granted by local authorities.
Timing is critical: the assessment should be conducted during the design phase so that any necessary adjustments to building plans can be made efficiently. Early engagement with a certified assessor not only streamlines regulatory compliance but also helps optimise sustainability outcomes and long-term cost savings for homeowners and investors.
Certified Energy is recognised across Australia for its technical expertise, rigorous quality assurance processes, and deep industry knowledge in energy efficiency assessment and compliance. Our team of accredited NatHERS assessors leverages state-of-the-art simulation tools and stays up to date with the latest regulatory developments to deliver precise, actionable reports tailored to each project’s requirements.
Our commitment to transparent communication, project management, and ongoing professional development ensures that clients receive industry-leading support throughout the planning and approval process. By choosing Certified Energy, stakeholders gain a reliable partner focused on maximising energy efficiency, minimising risk and achieving compliance with the highest standards of sustainability in the built environment.