If you’re concerned about your carbon footprint and the environment, your home might be among the first places you could reduce your impact. And owning a sustainable home could help you save on interest, thanks to some green home loan offerings.

Residential buildings – that is, people’s homes – account for around a tenth of Australia’s total carbon emissions. They’re also behind nearly a quarter of the country’s electricity usage.

Building a more energy efficient home, or improving the energy efficiency of your existing home, could help reduce your bills, your carbon footprint, and potentially even your home loan repayments.

Green home loans: Explained

Green home loans are very similar to regular home loans, but they typically boast one notable difference: They often offer lower or discounted interest rates.

The catch? The home a person is borrowing against must meet set energy efficiency, sustainability, or resilience standards.

That might mean it is:

  • solar powered
  • draught sealed
  • well insulated
  • water efficient
  • well ventilated
  • resilient against climate change

Of course, such environmentally friendly factors will likely also see homeowners saving on bills and living in greater comfort.

Green home loan rates

Like with other home loan products, the interest rates available to those hunting for a green home loan can vary markedly. Though, they are generally lower than those of their traditional counterparts.

But why would lenders offer lower rates for sustainable homes? Well, doing so might help them meet their climate targets.

A large chunk of the emissions from assets financed by Aussie banks often come from their home lending portfolios. Meanwhile, banks and lenders are aiming to reduce such emissions in their quest to become more sustainable or to reach net zero.

Thus, some might find it worthwhile to encourage owners of more sustainable houses to borrow through them by offering lower-cost loans for energy efficient homes.

Take a look at some of the rates on offer for green home loans right now in the table below.

Update resultsUpdate
LenderHome LoanInterest Rate Comparison Rate* Monthly Repayment Repayment type Rate Type Offset Redraw Ongoing Fees Upfront Fees LVR Lump Sum Repayment Additional Repayments Split Loan Option TagsFeaturesLinkCompare
5.99% p.a.
6.51% p.a.
Principal & Interest
  • Low rate home loan with added benefits, Offset sub-account available at no added cost
  • Save thousands & make an environmentally conscious choice on your loan for homes less than 12 months old
  • Get a 7.0 star NatHERS rating or higher for up to 0.84% discount on your variable rate home loan T&Cs apply
5.88% p.a.
6.38% p.a.
Principal & Interest
5.95% p.a.
6.23% p.a.
Principal & Interest
Important Information and Comparison Rate Warning

Base criteria of: a $400,000 loan amount, variable, fixed, principal and interest (P&I) repayments. All products with a link to a product provider’s website have a commercial marketing relationship between us and these providers. These products may appear prominently and first within the search tables regardless of their attributes and may include products marked as promoted, featured or sponsored. The link to a product provider’s website will allow you to get more information or apply for the product. By de-selecting “Show online partners only” additional non-commercialised products may be displayed and re-sorted at the top of the table. For more information on how we’ve selected these “Sponsored”, “Featured” and “Promoted” products, the products we compare, how we make money, and other important information about our service, please click here.

Monthly repayment figures are estimates only, exclude fees and are based on the advertised rate for a 30 year term and for the loan amount entered. Actual repayments will depend on your individual circumstances and interest rate changes. For Interest only loans – the monthly repayment figure is applicable only for the interest only period. After the interest only period, your principal and interest repayments will be higher than these repayments. For Fixed rate loans – the monthly repayment is based on an interest rate that applies for an initial period only and will change when the interest rate reverts to the applicable variable rate.

The Comparison rate is based on a secured loan amount of $150,000 loan over 25 years. WARNING: These comparison rates apply only to the example or examples given. Different amounts and terms will result in different comparison rates. Costs such as redraw fees or early repayment fees together with costs savings such as fee waivers, are not included in the comparison rate but may influence the cost of the loan. Comparison rates are not calculated for revolving credit products. Rates correct as of . View disclaimer.

Which lenders offer green home loans?

Some of the major banks offer discounted home loan interest rates for certain owners of energy efficient houses.

CommBank and NAB are among those providing discounted home loan interest rates for owners of green houses. Meanwhile, other large banks are also planning on it.

Customer-owned banks Gateway Bank, Regional Australia Bank, and Bank Australia also offer green home loans, as do non-bank lenders Firstmac and, as well as credit union Summerland.

Usually, lenders require some conformity to what is known as the NatHERs Green Star Rating and have your home meet a minimum of 7 stars, explained below.

What is a NatHERS or Green Star rating?

Banks and lenders will generally ask those applying for a green home loan to certify their home has received a rating from the Nationwide House Energy Rating Scheme (NatHERS) or the Green Building Council Australia.

NatHERS is an Australian Government scheme that measures the energy efficiency of a building and provides a rating of up to ten stars.

Some homeowners and hopefuls might not realise new homes, or those undergoing serious renovations, need to meet certain energy efficiency targets under the National Construction Code.

Often, that means they need a home energy rating from NatHERS. The Australian Government is also funding the expansion of NatHERS to offer rating for existing homes.

Meanwhile, the Green Building Council Australia assesses buildings for their energy efficiency and, if they pass a certification process, provides a Green Star rating.

Pros and cons of green home loans



Making more sustainable choices can have major ramifications on environments, communities, and individuals.

If you’re concerned about climate change, your carbon footprint, or your mounting energy bills, making more sustainable choices – such as building or buying a ‘green’ home – could help ease the burden.

Lower rates

Speaking of burdens, interest rates can be a burden to people’s back pockets.

Thus, accessing a lower interest rate by signing up to a green home loan could have the potential to make a positive impact on a person’s financial situation.

Higher loan-to-value ratio accepted

Traditional home loans typically demand a homeowner either has an 80% loan-to-value (LVR) ratio – meaning they offer a 20% deposit – or pays lenders mortgage insurance (LMI).

However, there are numerous green home loans that allow a borrower putting down a deposit of just 10% to dodge LMI. That could save certain mortgage-holders tens of thousands of dollars.



Owning a ‘green’ home in itself isn’t a downside of a green home loan. In fact, it could be a blessing to both your comfort and energy bills during Australia’s harsh summers and dire winters.

However, energy efficient homes are typically more expensive to build and rarer to find on the market, at least for now. Thus, they can cost more initially.

Fewer lenders

Another consideration that could be worth contemplating is the fact that fewer lenders currently offer green home loans than do traditional home loans. That means there’s less choice for those hoping to secure a green home loan.

How to make your home more energy efficient

It’s possible to retrofit sustainable technology or fixtures to existing houses to make them more energy efficient. And doing so needn't be difficult.

One of the easiest ways to increase the energy efficiency of your home is blocking draughts. By doing so, you can rest assured knowing you’re keeping in more heat during winter and more cool air during summer.

According to Sustainability Victoria, easy ways to do block draughts include:

  • Close doors to unused rooms and use draught stoppers
  • Block chimney draughts
  • Seal evaporative cooling outlets and exhaust fans
  • Seal gaps around doors and windows, walls and floors

Source: Sustainability Victoria

Adding solar panels to your roof can also help make your home more sustainable. And, they’ll likely save you some coin after an initial outlay too.

Finally, removing your home’s gas connection could help to reduce your carbon footprint.

Other ‘green’ loans

Many lenders offer what can be dubbed a ‘green loan’. Such ‘green loans’ are essentially personal loans designed to be used for an environmentally friendly purpose. Say, installing solar panels on your roof or energy-efficient window treatments.

Some car loan lenders also offer reduced interest rate loans for those borrowing to buy a low emission or electric vehicle.