Green Home Loans in Australia: How to Finance an Energy-Efficient Property

Green home loans are one of the newer and faster-growing segments of the Australian mortgage market. They offer discounted interest rates or fee waivers to borrowers who purchase energy-efficient homes, build new homes to a high energy standard or undertake eligible upgrades to existing properties.

If you are buying, building or renovating with sustainability in mind, a green home loan could reduce your borrowing costs. And even if sustainability was not a primary motivation, the savings are worth understanding.

What Is a Green Home Loan?

A green home loan is a standard home loan that comes with a rate or fee incentive attached to the energy performance of the property. Lenders offer these products because energy-efficient homes are associated with lower running costs for occupants, which can improve the borrower's financial position and reduce default risk.

From a broader perspective, these products also align with lenders' environmental, social and governance (ESG) commitments and help attract environmentally motivated customers.

How the Rate Discounts Work

Discounts vary by lender and product but generally work in one of two ways.

A discounted interest rate compared with the lender's standard variable or fixed rate, typically 0.1 to 0.5 per cent below the equivalent standard product.

Fee waivers on application, valuation or ongoing account-keeping charges.

Some lenders have tiered discount structures based on the energy rating of the property, with higher ratings receiving deeper discounts.

What Makes a Property Eligible?

Eligibility criteria vary between lenders, but the most commonly used measures are:

NatHERS Rating (Nationwide House Energy Rating Scheme)

NatHERS is Australia's star-based energy rating system for residential buildings. Homes are rated from zero to 10 stars, with higher stars indicating better energy efficiency. New homes in Australia are required to meet minimum energy standards, but green home loans typically require ratings of 7 to 7.5 stars or above.

New builds commissioned with green credentials in mind often meet or exceed these thresholds easily.

NABERS Rating

The National Australian Built Environment Rating System is used more commonly for commercial buildings but is increasingly referenced for residential assessments. Some lenders accept a NABERS rating as an alternative to NatHERS.

Green Star Certification

Green Star certification from the Green Building Council of Australia is another accepted standard for some lenders' green home loan products.

Solar Panel and Battery Systems

A small number of lenders have specific add-on products or rates for properties with existing solar panel installations above a certain capacity, particularly when combined with battery storage.

Electric Vehicle Charging

Some newer green loan products from progressive lenders include properties with EV charging infrastructure as an eligibility criterion.

Green Home Loans for Existing Properties

Purchasing or owning a high-rated existing property is the most straightforward path to accessing a green home loan. In practice, the supply of homes with documented high NatHERS ratings is still limited, though it is growing as new builds increasingly achieve higher standards.

Some lenders offer green home loan rates for existing homes that undergo eligible upgrades. These can include:

Installation of a solar panel system above a certain wattage.

Addition of a home battery system.

Upgrading to a high-efficiency hot water system or heat pump.

External insulation, double glazing or other building envelope improvements.

Borrowers undertaking these upgrades can potentially access a green rate after improvement, either through refinancing or through a specific renovation or upgrade loan facility.

Green Home Loans for New Builds

New construction is where green home loans are most naturally applicable. Modern building codes have progressively raised the minimum energy rating requirement for new homes in Australia, and many builders offer packages that comfortably exceed the minimum.

If you are commissioning a new build, specifying a target NatHERS rating (seven stars or above) from the outset allows you to target a green home loan product and build the documentation required for the lender's eligibility assessment from day one.

Construction Loans With Green Features

Some lenders extend their green loan criteria to construction loans for new homes that are being built to a qualifying energy standard. The structure is a standard progressive drawdown construction loan with the green rate applied once the building is complete and the energy rating is confirmed.

Is the Saving Material?

On a $600,000 loan, a 0.3 per cent rate discount saves $1,800 per year. Over 10 years, that is $18,000 in saved interest (before considering the compounding effect of the reduced balance). Over a 25 to 30 year loan term, the saving is more substantial.

Paired with the reduced ongoing energy costs of living in an energy-efficient home, the financial case is meaningful.

Use the Loan Repayment and Compare tools at HomeLoanTools.com.au to model the saving from a green rate discount on your specific loan size and compare green loan products from participating lenders.