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plan review


Servicing Sydney, Newcastle, Central Coast, Hunter, Wollongong, Illawarra & Shoalhaven


At Wollongong Energy Efficiency, we are accredited house energy rating assessors specializing in the Nationwide House Energy Rating Scheme (NatHERS) and the Building Sustainability Index (BASIX). Our comprehensive assessments consider factors such as thermal performance, insulation, ventilation, and renewable energy usage to evaluate the energy efficiency and sustainability of residential buildings.


With a focus on cost-effectiveness, our expertise in architectural drafting and design allows us to provide tailored, low-cost building recommendations that optimize energy efficiency while minimizing long-term costs. We prioritize streamlining the assessment process to ensure efficient council approvals, saving our clients valuable time and resources. Through our dedicated services, we aim to contribute to the development of sustainable buildings and create a greener future.

Architectural Plan

BASIX Certificates are an essential requirement for ensuring compliance with the NSW Government's stringent minimum standards for water efficiency, thermal comfort, and energy efficiency in new dwelling construction projects. These certificates serve as a vital tool in reducing Australia's carbon footprint and promoting sustainable practices in the building industry.


It is important to understand that BASIX Certificates are not only mandatory for single-family homes but also for a wide range of dwellings, including Granny Flats and Multi-Dwelling Units. Furthermore, they are required for swimming pools and outdoor spas with a water capacity equal to or greater than 40,000 litres.

When embarking on a construction project and seeking approval through your local council or private certifier for your Development Application (DA) or Comply Development Certificate (CDC), obtaining a BASIX Certificate is a fundamental requirement. The certificate ensures that your construction project meets the prescribed standards set by the NSW Government. It addresses crucial aspects of sustainability, including water efficiency, thermal comfort, and energy efficiency.

The Water Section of the BASIX Certificate focuses on promoting efficient water usage within the construction project. It encourages the incorporation of features such as rainwater tanks, water-saving fixtures, and efficient irrigation systems. These measures aim to minimize water consumption and preserve this valuable resource.

The Thermal Comfort Section of the BASIX Certificate addresses the crucial aspect of maintaining a comfortable indoor environment throughout the year. It emphasizes factors like insulation, ventilation, and shading to ensure that the building's occupants can enjoy optimal thermal conditions while minimizing the need for excessive heating or cooling. By implementing appropriate strategies in these areas, homeowners can experience increased comfort and reduced reliance on energy-consuming heating and cooling systems.

The Energy Section of the BASIX Certificate places great emphasis on energy efficiency, promoting the use of appliances, lighting, and renewable energy sources that minimize energy consumption. This section encourages the integration of energy-efficient technologies and practices, enabling homeowners to reduce their ecological footprint and achieve long-term cost savings through reduced energy bills.

By obtaining a BASIX Certificate, you not only comply with regulatory requirements but also contribute to the creation of a more sustainable and environmentally conscious society. These certificates play a crucial role in promoting water conservation, ensuring comfortable living environments, and minimizing energy consumption in residential buildings.


The Nationwide House Energy Rating Scheme

The Nationwide House Energy Rating Scheme (NatHERS) is a vital tool for meeting the energy efficiency requirements outlined in the National Construction Code (NCC), which applies across all states and territories in Australia.

To determine the energy required to maintain a comfortable indoor environment with heating or cooling systems, the NatHERS software analyzes building plans and specifications. This software, accredited by NatHERS, utilizes the CSIRO's Chenath engine for accurate calculations. Once the energy efficiency requirements are met, a NatHERS certificate is issued, indicating a star rating on a scale of up to 10 stars.

The star ratings provided by NatHERS are based on a thorough evaluation of a building's thermal performance, taking into account factors such as materials, orientation, design, and window glazing. These elements significantly impact a building's energy consumption and its ability to maintain a comfortable temperature throughout the year.

In most states and territories, the NCC mandates a minimum star rating of 6 stars for all dwellings. However, it is essential to verify the specific requirements set by your state or local council with the assistance of a qualified NatHERS assessor. We can guide you through the process and ensure that your building project complies with the energy efficiency standards in your region.

Blueprint Design

It has been almost 6 months since NSW adopted the NCC 2022 energy efficiency requirements. How has this affected the requirements for most dwellings? And what is in store for the other states & territories as these new requirementscome into effect?

There are nine different considerations to keep in mind when designing your home for a higher NatHERS rating, including involving your NatHERS assessor early, considering orientation & improving glazing as well as some other tips and tricks from an experienced NatHERS assessor. Read this article to learn what they are.

‎As most of us now know, from October 2023, all new homes will be required to achieve a minimum 7-star NatHERS rating, up from the current 6-star rating. But what does this mean for builders and homeowners, and how can they achieve a 7-star rating? 

Cameron Rowe

I regularly use Jacob and the team for my energy reports. Super fast turn around and easy to deal with.

BASIX & NatHERS Certificates


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