What Is a 7 Star Energy Rating for New Homes

Friday 22 May 2026

If you are building a new home in Victoria, you will likely come across the requirement for a 7 star energy rating. While it is often mentioned during the planning and design stages, many buyers are unsure what it actually means or how it affects their home.

With updated building standards now in place, understanding how the 7 star energy rating works is an important part of making informed decisions before you build.

Introduction To Star Energy Rating System

Energy efficiency has become a major focus in the Australian construction industry, particularly as new regulations aim to reduce energy use in residential homes.

For many buyers, the shift from previous standards to a 7 star requirement has created confusion. Terms such as thermal performance, energy modelling and compliance are often used, but not always explained in a practical way.

Having a clear understanding of how the rating works can help you better evaluate designs, inclusions and overall performance when planning your new home.

What Is A 7 Star Energy Rating

A 7 star energy rating is a measure of how efficiently a home maintains a comfortable indoor temperature throughout the year.

It is assessed using the Nationwide House Energy Rating Scheme, commonly referred to as NatHERS. This system evaluates the thermal performance of a home, which focuses on how much heating and cooling energy is required to keep the home comfortable.

A higher star rating indicates better performance. A 7 star home is designed to reduce reliance on artificial heating and cooling by improving how the home responds to its environment.

7 Star Energy Rating Requirements In Victoria

Under the National Construction Code 2022, all new homes in Victoria are required to meet a minimum 7 star energy rating.

This represents an increase from the previous 6 star requirement and reflects a broader push towards improving energy efficiency across new residential builds.

In addition to thermal performance, the updated standards also introduce a Whole of Home energy use requirement. This considers the energy consumption of fixed appliances and systems such as heating, cooling and hot water, rather than focusing solely on the building design.

Together, these requirements set a higher baseline for energy efficiency in new homes.

When Does The 7 Star Energy Rating Start

The 7 star energy rating requirements were introduced as part of NCC 2022, with implementation rolling out through 2023 and becoming mandatory in Victoria from May 2024.

The exact timing depends on when building permits are issued and whether a project falls within any transition period. For new contracts moving forward, the 7 star requirement now applies as the standard.

How Energy Rating Is Measured

The rating is calculated using the NatHERS assessment system, which uses software to model how a home will perform under different climate conditions.

Rather than measuring actual energy use, the system evaluates the design of the home and how it influences heating and cooling needs.

Key factors include:

  • Orientation of the home

  • Insulation levels

  • Window glazing and placement

  • Shading and eaves

  • Overall building layout and materials

These elements work together to determine how well the home maintains internal temperatures without relying heavily on mechanical systems.

Orientation of the Home

Window Glazing & Palcement

Shading & Eaves

What Changes Are Needed To Achieve 7 Stars

To meet a 7 star energy rating, builders and designers typically need to place greater focus on how the home is designed and constructed.

This often involves applying passive design principles, which consider how the home interacts with sunlight, airflow and the surrounding environment.

Common changes include improving insulation levels, upgrading window glazing, and incorporating shading elements such as eaves. Orientation of the home also plays a key role, as it can influence natural light and heat gain throughout the day.

In addition to design changes, systems such as heating and cooling, hot water and solar panels may also be considered as part of the overall energy performance.

How 7 Star Rated Homes Impact Buyers

For home buyers, a 7 star energy rating can offer several practical benefits.

Homes designed to meet higher energy efficiency standards are typically more comfortable to live in, maintaining more stable indoor temperatures throughout the year.

They can also reduce ongoing energy costs, as less reliance is placed on heating and cooling systems. Over time, this can lead to lower energy bills and improved long term affordability.

These benefits make energy efficient homes more appealing not only for current living, but also for future resale.

Common Misconceptions About 7 Star Homes

One common misconception is that a 7 star energy rating is achieved simply by adding solar panels. While solar can contribute to overall energy performance, the rating itself is primarily focused on the thermal design of the home.

Another misunderstanding is that a higher rating always results in significantly higher construction costs. While some upgrades may be required, many improvements come from smarter design choices rather than expensive additions.

There is also confusion between thermal performance and total energy use. The star rating reflects how the home performs structurally, while the Whole of Home requirement considers how systems and appliances contribute to energy consumption.

How To Approach A 7 Star Home Build

When planning a new home, it is important to consider energy efficiency from the early design stages.

This includes understanding how the home is oriented on the block, what level of insulation is included, and how windows and shading are designed.

Working with a builder who understands the requirements and can explain how different design choices impact performance will make the process much easier.

Focusing on both compliance and practical outcomes ensures the home not only meets the required standards but also performs well in day to day living.

Home Designs

Eight Homes Builds With Energy Efficiency In Mind

The introduction of the 7 star energy rating reflects a broader shift towards more efficient and sustainable homes in Australia.

While the requirements may seem complex at first, they are ultimately designed to improve comfort, reduce energy use and create better long term outcomes for homeowners.

At Eight Homes, we help guide buyers through these requirements with clear explanations and practical design solutions, ensuring your home meets the necessary standards while still aligning with your lifestyle and budget.

Frequently Asked Questions