Understanding your home’s energy rating is no longer just about compliance; it’s a critical step towards significant cost savings and a more comfortable living environment in 2026. The Nationwide House Energy Rating Scheme (NatHERS) provides a 0-10 star rating that indicates your home’s thermal performance – essentially, how much energy it needs for heating and cooling. A higher star rating means less reliance on artificial heating and cooling, directly translating to lower energy bills and a smaller carbon footprint.
Since the National Construction Code (NCC) 2022 came into effect across most states and territories by 2026, all new homes must now achieve a minimum 7-star NatHERS rating. This is a substantial jump from the previous 6-star minimum, designed to cut heating and cooling energy demand by up to 25% compared to a 6-star home. Beyond the thermal shell, the NCC 2022 also introduced a ‘Whole-of-Home’ rating, scored out of 100, which factors in the energy consumption of fixed appliances like hot water systems, lighting, and air conditioning, alongside any on-site energy generation and storage. New homes need to score at least 60.
Crucially, the Australian Government is investing $32.7 million to expand NatHERS to existing homes from mid-2026. This initiative will provide homeowners with valuable insights into their property’s energy performance and identify the most cost-effective upgrades.
What Does a NatHERS Assessment Cost in 2026?
The cost of a NatHERS assessment in 2026 varies depending on your home’s size, type, and complexity, as well as your state. For most Australian homes, you can expect to pay between AUD$300 and AUD$600, with the median sitting around AUD$420.
| Home Type / State | New Build (Plans) | Existing Home |
|---|---|---|
| Average Australia | AUD$200 - AUD$400 | AUD$350 - AUD$550 |
| NSW | AUD$200 - AUD$400 | AUD$350 - AUD$600 |
| Victoria | AUD$180 - AUD$380 | AUD$300 - AUD$550 |
| Queensland | AUD$180 - AUD$350 | AUD$300 - AUD$500 |
| South Australia | AUD$200 - AUD$380 | AUD$320 - AUD$550 |
| Western Australia | AUD$200 - AUD$400 | AUD$350 - AUD$600 |
| Tasmania | AUD$200 - AUD$380 | AUD$320 - AUD$550 |
| ACT | AUD$200 - AUD$400 | AUD$350 - AUD$600 |
| Northern Territory | AUD$200 - AUD450 | AUD$350 - AUD$650 |
Source: MyEnergyRating.com.au, Ecomaxhomes (2026 data)
For complex or architect-designed homes, costs can reach up to AUD$1,000 for an existing home assessment. It’s worth noting that in NSW, a NatHERS assessment can be funded through the new Home Energy Saver program’s zero-interest loans.
Government Rebates and Schemes for Smart Upgrades in 2026
Both federal and state governments are actively promoting energy efficiency through various incentives in 2026. These programs can significantly reduce the upfront cost of upgrades, making higher energy ratings more accessible.
“Even improving a home from 3 to 5 stars could reduce the energy needed for heating and cooling by around 40 per cent with a corresponding reduction in costs and emissions.”
Federal Government Initiatives
- Small-scale Renewable Energy Scheme (SRES): This national program provides Small-scale Technology Certificates (STCs) for eligible solar panel and heat pump hot water installations, offering an upfront discount on your purchase. Be aware that as of January 1, 2026, the deeming period for STCs dropped from 6 to 5 years, resulting in a 15-20% reduction in the upfront discount for new solar panels.
- Cheaper Home Batteries Program: Expanded with AUD$7.2 billion, this program shifted to a tiered rebate system from May 1, 2026, favouring smaller, appropriately sized battery systems to ensure grid stability.
- Household Energy Upgrades Fund (HEUF): A AUD$1.3 billion fund offering discounted green loans (low or zero interest) via partner lenders for retrofits like double glazing, insulation, heat pump hot water, and battery storage.
- National Energy Bill Relief: For the 2025-26 financial year, most Australian households will receive a total of AUD$150 in direct electricity bill credits, typically applied in two AUD$75 instalments.
State-by-State Rebates and Loans
New South Wales (NSW)
The NSW Government’s Home Energy Saver Program, launched in June 2026, offers significant financial assistance:
- Zero-interest loans: Up to AUD$15,000 for eligible households with a combined taxable income up to AUD$210,000. These loans cover rooftop solar, home batteries, insulation, EV chargers, reverse-cycle air conditioning, heat pump hot water systems, and double glazing.
- Targeted discounts: Up to AUD$4,000 will be available later in 2026 for lower-income households (combined annual income up to AUD$80,000 or eligible concession card holders).
Victoria (VIC)
The Victorian Energy Upgrades (VEU) program is one of the most comprehensive, providing upfront discounts on a wide range of products:
- Heat Pump Hot Water: Rebates of up to AUD$1,000 when replacing an old electric or gas system.
- Reverse Cycle Air Conditioning: Discounts can be as high as AUD$5,530 when replacing a gas ducted heating system with an efficient reverse-cycle unit.
- Insulation: From October 1, 2026, VEU formally expands ceiling insulation as a rebate activity to all eligible residential homes.
- Glazing: VEU offers incentives that can save approximately AUD$350 per window.
- Solar Homes Program: Up to AUD$1,400 rebate for solar panel installations and an interest-free loan of up to AUD$1,400.
Queensland (QLD)
While QLD offers battery support and solar for rentals, its primary focus for homeowners often aligns with federal incentives and the broader Clean Energy Council (CEC) approved installer network. Homeowners should investigate local council initiatives and the federal SRES for heat pumps and solar.
South Australia (SA)
The Retailer Energy Productivity Scheme (REPS) requires energy retailers to provide discounted upgrades. In 2026, REPS is more targeted, with higher incentives for Priority Group households (concession card holders).
- Heat Pump Hot Water: Rebates around AUD$930 for households without a gas connection, and AUD$270 for those with gas. An additional AUD$124 is available for Priority Group households.
- Insulation and Efficient AC: Covered under REPS, offering significant upfront savings.
Australian Capital Territory (ACT)
The Sustainable Household Scheme offers low-interest (currently 3%) loans up to AUD$15,000 for a range of energy-efficient upgrades, increasing to AUD$20,000 from July 1, 2026.
- Eligible upgrades: Heat pump hot water, ceiling insulation (rebates up to AUD$4,600), electric heating/cooling (up to AUD$3,000 for gas-to-electric conversion), solar, home batteries, EV chargers, and double glazing.
Tasmania (TAS)
Tasmania’s Energy Saver Loan Scheme provides low-interest loans from AUD$500 to AUD$10,000 for energy efficiency upgrades, including hot water systems. While no dedicated state heat pump rebate exists, the federal STC scheme applies, offering AUD$300-AUD$700 off systems.
Western Australia (WA)
WA’s Distributed Energy Buyback Scheme (DEBS) provides credits for exporting solar energy. For energy efficiency upgrades, homeowners should primarily look to the federal schemes and any emerging local government incentives.
Smart Upgrades to Boost Your NatHERS Rating and Slash Bills
Improving your NatHERS rating and overall home energy performance involves a combination of structural enhancements and efficient appliance choices. Here are some of the most impactful upgrades:
1. High-Performance Insulation
Insulation is fundamental to thermal performance. Upgrading your ceiling, wall, and floor insulation can drastically reduce heat transfer, keeping your home cooler in summer and warmer in winter. For optimal performance, consider R-values appropriate for your climate zone. For more detailed information on insulation rebates, see our guide: Slash Your Winter Bills by Up To $800: Best Home Insulation Upgrades & 2026 State Rebates
2. Double Glazing and Window Treatments
Windows are a major source of heat loss and gain. Double glazing creates an insulating air gap, significantly improving thermal performance.
| Feature | Cost per sq/m (2026) | Whole-Home (4-bed) |
|---|---|---|
| uPVC Frames | AUD$300 - AUD$500 | AUD$15,000 - AUD$22,000 |
| Aluminium Frames | AUD$300 - AUD$1,250 | AUD$15,000 - AUD$22,000 |
| Timber Frames | AUD$600 - AUD$1,500 | AUD$15,000 - AUD$22,000 |
Source: Clinic Maintenance, hipages (2026 data)
Double glazing can cut heating costs by 30% and overall energy bills by up to 25%. Consider low-emissivity (Low-E) coatings for an additional 15-20% cost, which further reduces heat transfer.
3. Heat Pump Hot Water Systems
Heat pumps are highly efficient, using ambient air to heat water, consuming up to 75% less electricity than traditional electric storage systems.
| System Type | Average Supply & Install Cost (2026, incl. STCs) |
|---|---|
| National Average | AUD$4,527 |
| Queensland | AUD$4,191 |
| Victoria | AUD$4,405 |
| New South Wales | AUD$4,815 |
| Tasmania | AUD$6,118 |
Source: Solar Choice Heat Pump Price Index (April 2026)
Popular models include the iStore 270L (known for value), Apricus 270L All-in-One, Emerald Energy 270L, and premium Sanden Eco Plus or Reclaim Energy CO2 Heat Pumps (often AUD$5,000+). Running costs can be as low as AUD$150-AUD$300 per year. For more, read our guide: Heat Pump Hot Water Australia 2026: Slash Bills by $900+ with Rebates
4. Efficient Heating and Cooling (Reverse Cycle Air Conditioners)
Reverse cycle air conditioners (split systems) are the most energy-efficient option for heating and cooling, operating by moving heat rather than generating it. Victorian households switching from gas heating to reverse cycle systems have reported annual energy bill reductions of between AUD$610 and AUD$1,220. Discounts are available via the VEU program in Victoria, and loans in NSW and ACT cover these upgrades.
5. Smart Home Energy Management Systems
Integrating a smart home energy system allows you to monitor and control energy usage in real-time, optimising appliances and potentially participating in Virtual Power Plants (VPPs) for additional revenue. This can further reduce your ‘Whole-of-Home’ energy budget. Explore more with our guide: Smart Home Energy Systems: Slash Your 2026 Australian Electricity Bills by Up To 30%
Bottom Line
Your home’s energy rating in Australia for 2026 is a crucial indicator of its performance and running costs. With the new 7-star NatHERS minimum for new builds and the expansion of assessments to existing homes, understanding and improving your rating is more important than ever. By leveraging federal and state government rebates and loans – potentially saving you over AUD$15,000 on major upgrades like insulation, double glazing, and heat pump hot water systems – you can significantly enhance your home’s comfort, reduce your energy bills, and contribute to Australia’s clean energy future. Start by getting a NatHERS assessment for your existing home when available, or ensure your new build meets the 7-star standard, then strategically invest in smart upgrades with government support.