7 Star BASIX - A Guide For Your New Home

7 Star BASIX requirements for a NSW new home build may sound complicated, but our team at  Eden Brae Homes believes that they are a giant step forward in building standards, design, and construction. Since 7 star BASIX requirements were first introduced (in October 2023) to align NSW’s BASIX thermal targets with the 7 star ratings set by the National House Energy Rating Scheme (NatHERS), it has helped to ensure that new homes are better for both families and the environment, and supports Australia's environmental goals. Let’s take a closer look at what 7 star BASIX means, why it’s important, and what you can include in your home’s design to ensure you get that BASIX 7 star rating.

What is BASIX 7 star and why is it important for new homes?

BASIX refers to the Building Sustainability Index, a regulatory framework introduced by the New South Wales government, that was designed to ensure that all new residential buildings (including single dwellings, dual occupancy dwellings, villas and granny flats, townhouses, units and multi-unit developments, alterations and additions greater or equal to $50k, and swimming pools and/or outdoor spas with a water capacity greater or equal to 40,000L)  meet the strictest standards for improved energy efficiency, maintain thermal performance for a comfortable temperature, and water conservation.

The 7 star rating reflects the overall thermal performance assessed through the NatHERS, and all new home designs are now required to meet this BASIX 7 star rating. The purpose of the 7 star BASIX standard was to make homes more sustainable by reducing their energy consumption, greenhouse gas emissions, and reliance on non-renewable resources, and making them more cost-effective and comfortable for residents. For your building process it’s a win-win all round!

7 Star BASIX Requirements

Here is a detailed breakdown of what the 7 star BASIX requirements include:

Thermal Performance

- Features such as high-quality insulation, energy-efficient windows, and passive solar design.

Energy Efficiency

- The use of solar photovoltaic systems to generate renewable energy, and the use of energy-efficient lighting and high-energy appliances.

Water Efficiency

- Incorporate water-saving measures such as rainwater tanks, efficient fixtures (shower heads and taps), and greywater recycling systems. 

- Proper landscaping using native plants and efficient irrigation systems also contributes to reducing water use.

Building Design

- Homes can be oriented and the layout designed to make the most of natural light and cross-ventilation, reducing the need for artificial lighting and mechanical ventilation. 

Key Inclusions to Ensure BASIX 7 Star Compliance

To achieve BASIX 7 star compliance, builders need to include key inclusions that are crucial for ensuring BASIX 7 compliance:

Double-Glazing

Double-glazed windows act as an insulating barrier, reducing heat loss in winter and heat gain in summer. They also reduce the reliance on heating and cooling systems.

Solar Panels

By generating renewable energy on-site, solar panels help reduce the home’s reliance on grid electricity, significantly cutting energy costs and greenhouse gas emissions.

Insulation

Proper ceiling, wall, and underfloor insulation helps to minimise heat transfer, keeping homes warm in winter and cool in summer.

Energy-Efficient Windows and Doors

Energy-efficient frames and sealed windows and doors can make a significant difference in thermal performance, preventing air leakage, which is a common source of heat loss or gain. 

LED Lighting and Efficient Appliances

LED lights use less energy than traditional bulbs, while energy efficient appliances reduce the overall electricity demand of the home.

Water-Saving Fixtures and Rainwater Tanks

Builders should install water-saving fixtures like low-flow taps, showerheads, and dual-flush toilets. Additionally, integrating rainwater tanks can significantly reduce a home’s water usage. 

Passive Solar Design and Orientation

A well-thought-out passive solar design and orientation is key to achieving thermal comfort without relying heavily on heating and cooling.

Ventilation Systems and Cross-Ventilation

Natural ventilation plays a significant role in maintaining indoor air quality and reducing the need for cooling, and ventilation systems like exhaust fans in kitchens and bathrooms can help remove humidity, keeping the indoor environment comfortable.

Thermal Mass Materials

Concrete, brick, or stone in flooring or walls can help regulate indoor temperatures. These materials absorb heat during the day and release it at night, helping to maintain a stable temperature inside the home. 

Frequently Asked Questions - BASIX 7 Star 

What are the benefits of BASIX 7 for homeowners?

Whether you’ve got a knockdown rebuild or your starting from scratch, the BASIX 7 star standard brings numerous benefits to homeowners, including:

Enhanced energy efficiency

Your home is built with high energy efficiency standards, such as better insulation, double glazing, and energy-saving technologies like solar panels. This means your home uses less energy for heating, cooling, and powering appliances, reducing its overall environmental footprint.

Increased comfort

Stable indoor temperature, keeping your home warm in winter and cool in summer without over-relying on heating and cooling systems, allowing you to enjoy a pleasant indoor climate regardless of the season.

Future-proofing your home

With energy-efficient designs and materials, your home is better equipped to meet future regulatory changes or shifts in weather patterns.

Boosted property value

A home that is energy-efficient and sustainable is a strong selling point in today’s real estate market. Buyers recognise the long-term savings and comfort benefits that come with a high BASIX rating.

Reduced bills

One of the most immediate benefits of BASIX 7 compliance is the potential for reduced energy and water bills. 

Why does energy efficiency matter for homeowners?

Homes that are energy-efficient use less power for heating, cooling, and lighting, which translates into lower energy bills and long-term savings. Additionally, energy-efficient homes have a smaller carbon footprint, reducing greenhouse gas emissions and contributing to a more sustainable future.

How is the BASIX 7 star rating measured?

A 7 star rating means that the home has been designed to maintain a high level of energy efficiency, providing better insulation and comfort compared to lower-rated homes. The key factors in measuring a 7 star BASIX energy rating:

• Thermal Comfort: NatHERS software simulates how the building will perform in maintaining comfortable indoor temperatures during different seasons, based on the design of the home and local climate conditions. The aim is to keep indoor temperatures stable and comfortable with minimal energy use for heating and cooling.
  
• Building Design Elements: The software considers various design factors such as insulation levels, window placement, glazing type, orientation, and building materials. The design is assessed to see how effectively these elements work together to reduce heat loss in winter and limit heat gain in summer.
• Climate Zone Data: NatHERS uses climate zone data to tailor the assessment to the specific location of the home. This ensures that the rating reflects the real-world conditions the home will face.
  

How does a home achieve 7 star BASIX requirements in NSW

Designing homes that comply with 7 star BASIX requirements can be both practical and achievable, and it doesn't have to be costly or complicated. Simple design features, smart material choices, and small adjustments can make a big difference in energy efficiency and achieving the 7 star BASIX rating. Here are some actionable tips to help you design homes that meet these standards:

Orientation

Designing and positioning your home correctly can significantly reduce the need for artificial heating and cooling, making the home more energy-efficient.

Upgrade building materials

Opt for materials like insulated concrete forms (ICFs), thermal mass materials such as brick or stone, and thermally efficient wall panels. These materials help regulate indoor temperatures by storing and slowly releasing heat, keeping your home warm in winter and cool in summer. While they might cost more upfront, these materials provide long-term savings through reduced energy consumption.

Improve the glazing

Upgrading to double-glazed windows can make a huge difference in a home’s energy efficiency. Choose low-emissivity (Low-E) glass for even better insulation, as it reflects heat while still allowing natural light into your home. 

Insulate more

Focus on high-R-value insulation for ceilings, walls, and under floors to minimise heat transfer. Insulate areas that are often overlooked, like roof cavities and around windows and doors, to prevent heat leakage. Effective insulation reduces the need for artificial temperature control and boosts energy efficiency.

Install fans

Ceiling fans improve air circulation and are an affordable and energy-efficient way to enhance comfort in your home without relying heavily on air conditioning.

Lighten colours

Light-coloured paints and materials for the exterior of your home can reduce heat absorption, especially in warmer climates.

Consider lighting choices

When it comes to indoor lighting, opt for energy-efficient LED lights throughout your home. LEDs use a fraction of the energy compared to traditional bulbs and have a longer lifespan. Incorporate natural lighting into your design by placing windows strategically and skylights can bring in additional daylight.

Where can I get more information about 7 star BASIX?

To get more information about 7 star BASIX requirements in NSW, you can refer to the following resources:

1. NSW Planning Portal - BASIX for fact sheets, guides, and FAQs related to BASIX 7 star standards.

2. NatHERS (Nationwide House Energy Rating Scheme). 

3. Sustainability Consultants and NatHERS Assessors.

4. Local Council Planning Offices in NSW often provide support and information about complying with 7 star BASIX requirements as part of the building approval process. 

5. Builders like our team at Eden Brae, fully understand 7 star BASIX requirements in NSW and we can offer you valuable advice on design strategies, material choices, and construction techniques that will help you achieve compliance.

Eden Brae’s Approach to 7 Star BASIX Compliance

By implementing these practical design tips in your new home build, you can create a home that meets the 7 star BASIX requirements while keeping energy costs low and maintaining comfort throughout the year.

Here at Eden Brae Homes, we provide superb BASIX-compliant designs, with a strong commitment to energy efficiency, sustainability, innovation, and comfort.

If you’re getting your site ready to build your new home and want more information on building with a BASIX 7 star rating, then contact our Eden Brae team today.