In the ever-evolving landscape of sustainable architecture and environmentally conscious design, systems and ratings in place can help determine the energy efficiency of residential buildings in Australia.

Australia has multiple building rating systems that evaluate energy efficiency and sustainability in existing and new building designs.

Some systems assess individual building components, while others provide an overall rating for the entire structure.

A rating system ensures that homes are comfortable and energy-efficient, whether you are buying, renovating, or building.

NatHERS (Nationwide House Energy Rating Scheme) is a common way for new homes to meet energy efficiency requirements.

As new developments continue to shape the urban environment, understanding NatHERS ratings becomes essential for developers and homeowners. This article delves into the concept of NatHERS ratings, their significance, and how they contribute to creating energy-efficient homes.

<h2>What is NatHERS?</h2>

NatHERS is a national initiative implemented by the Australian government to promote energy efficiency in residential buildings. The scheme aims to provide a standardised method for assessing the thermal performance of homes, considering factors such as insulation, orientation, ventilation, and building materials.&nbsp;

NatHERS ratings are the most common way new homes meet the National Construction Code's (NCC's) minimum energy efficiency requirements.&nbsp;

NatHERS assessments provide thermal and whole-home ratings for new homes, townhouses, and apartments.

The rating helps evaluate the energy performance of buildings, guides homeowners and developers to make informed decisions about the energy efficiency of their properties, and encourages the construction of more sustainable, comfortable, and cost-effective homes.

<h2>How NatHERS Ratings Work</h2>

NatHERS ratings are determined through four accredited software tools (AccuRate, BERS Pro, FirstRate5, HERO) using a calculation engine CSIRO developed to predict building temperature based on various factors.

The tools can model complex effects of building mass, insulation, window size, and other elements.

The outcome is a star rating that reflects the building's overall thermal efficiency, indicating how well it can maintain a comfortable indoor temperature without excessive reliance on heating or cooling systems.

The star rating scale ranges from 0 to 10, with a 6-star rating being the minimum requirement for compliance with the National Construction Code (NCC).&nbsp;

Achieving a higher star rating demonstrates a commitment to energy efficiency and sustainability, as the building is better equipped to minimise its environmental impact and reduce long-term energy costs.

Anyone can use NatHERS tools, but accredited assessors can provide certified ratings and professional advice.

<h2>Benefits of Higher NatHERS Ratings</h2>

Energy Efficiency: Buildings with higher NatHERS ratings are more energy-efficient, requiring less heating and cooling energy. This reduces the structure's carbon footprint and lowers occupants' energy bills.

Cost Savings: Homes with higher NatHERS ratings are generally more energy-efficient, resulting in reduced energy consumption for heating and cooling. This translates to lower energy bills for homeowners, making sustainable living environmentally friendly and economically viable in the long run.

Environmental Impact: Lower energy consumption directly translates to a reduced environmental impact. Buildings with higher NatHERS ratings contribute to the overall goal of mitigating climate change by lowering greenhouse gas emissions associated with heating and cooling systems.

Improved Comfort: Buildings with high NatHERS ratings offer better thermal comfort to occupants. Proper insulation, well-designed ventilation, and optimal orientation maintain a consistent and comfortable indoor temperature, providing occupants with a more enjoyable and healthier space.

Market Value and Desirability: Higher NatHERS ratings can enhance the market value of a property. As energy efficiency becomes a more significant consideration for homebuyers, a well-rated building may attract a premium price and stand out in the real estate market.

Compliance with Building Codes: NatHERS ratings are a vital component of the National Construction Code (NCC), and compliance with these ratings is often a mandatory requirement for new developments. Local councils and planning authorities may set minimum energy efficiency standards that must be met to obtain development approval.

The Nationwide House Energy Rating Scheme (NatHERS) is a crucial initiative shaping the future of energy-efficient, resilient, and cost-effective homes. With its recent upgrades, NatHERS has evolved into a world-leading tool for the building sector, supporting the global commitment to achieving net-zero emissions by 2050.

Urban Editorial

What is a NatHERS rating in new off the plan apartment developments?

First home buyers are shrugging off the recent interest hikes with a spike in new mortgages for those looking to enter the market for the first time.

Data from the ABS Lending Indicators showed a 25.8 per cent increase in the value of new loan commitments for first home buyers, up to $5.25 billion nationally.

The value of new loan commitments for investors was rising higher than owner occupier borrowers. Investment lending increased by 18 per cent to reach $9.72 billion while owner occupier new loan commitments were up only 10.6 per cent over the year to reach $17.86 billion in loans.&nbsp;&nbsp;

A total of $27.58 billion in new home and investment property loans were taken out in November, up by a modest one per cent from October and 13.1 per cent over the year.&nbsp;&nbsp;

Investors are up for the month by 1.9 percent, which compares to an increase of only 0.7 percent for owner occupiers.

"You could say investors are back," Canstar’s lending expert Steve Mickenbecker says, with new lending up by 18 percent year-on-year, suggesting they hold a healthy expectation for property prices over the coming few years.

“It’s first home buyers who are leading the way with new lending commitments up by 2.8 percent for the month and 25.8 percent for the year,"&nbsp;Mickenbecker says.

"Looking at the number of buyers, first home buyers’ participation represents 37 percent of all new loans."

The biggest spike in first home buyers was in Queensland, where number of loans issued jumped 10.8 per cent in November. Victoria rose 1.2 per cent and Sydney fell 4.8 per cent, unsurprisingly given the cost of buying property in much higher in the harbour capital.

First home buyer new mortgages spike as "investors are back"

UDIA NSW has said it remains highly concerned about the state of housing in NSW following the recent building approvals update from the ABS.

Approvals reported across NSW for the 12 months to November 2023 sat at 46,500, the lowest rolling annual total seen in the state since October 2013. 
&nbsp; 
These decade-low approvals come at a time when our nation is looking to reverse course on our housing crisis and embark on our most ambitious nationwide housing program ever. In 2023, the NSW Government committed to deliver 377,000 homes over five years as part of the National Housing Accord, commencing in June 2024, now less than 6 months away. 
&nbsp; 
UDIA analysis shows that due to the time needed to go from approval to final completion, NSW needs on average, 92,000 new approvals per annum over the next 5 years to underpin our annual housing targets. This monumental uptick in approvals needs to begin now, however today’s announcement by the ABS is sobering news.&nbsp;

The graph below shows the steep increase needed in approvals for new houses to be built within the Accord period.

<img alt="Decade-Low approvals show we are yet to turn the corner on NSW Housing Crisis" data-entity-type="file" data-entity-uuid="5b20b8d1-caf8-4719-b81a-04bae1c63417" src="https://s3.ap-southeast-2.amazonaws.com/www.urban.com.au/s3fs-public/inline-images/NSW%20Forecast%20vs%20Accord%20Targets.png?VersionId=RsY_ObT5CJqjKGsbAx29qHsL2LoqFbl2" />

Worryingly, today’s results also show declining approval numbers are not limited to a particular housing type – detached house approvals have now declined for 24th consecutive months, to a near decade low of 22,300.

Medium density approvals also hit a three-year low of 10,400, while apartment approvals, despite increasing slightly to 13,900, remain 63% below their peak, a peak which would need to be replicated and exceeded if we are to reach our targets under the Housing Accord. 
&nbsp; 
“While the NSW Government finished 2023 with a series of positive policy reforms to increase housing supply, today’s numbers show we are falling further behind, &nbsp;before the National Housing Accord even starts,” said Gavin Melvin, UDIA NSW A/CEO. 
&nbsp; 
“Today’s figures create an added sense of urgency that each of the Government’s announced new policies will be implemented successfully and delivered in full. These figures show we have no time to waste and that initiatives which can commence now, such as the affordable housing bonus, should do so allowing development applications to be submitted, approvals to flow, and new homes to be built sooner," Melvin said.

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