Disclosure and Market Readiness

Home Energy Rating Disclosure in Australia

Home energy rating disclosure is becoming an important part of Australia’s existing homes conversation.

Disclosure means that a home’s energy rating may be shared with prospective buyers or renters when a property is sold or leased. The aim is to make energy performance easier to understand before people make major property decisions.

Australia is not yet operating under one uniform mandatory disclosure scheme for all existing homes. However, national frameworks, NSW trials and real estate sector preparation show that energy performance information is likely to become more visible in the housing market.

What is home energy rating disclosure?

Home energy rating disclosure is the process of making a home’s energy performance rating available to people who may buy, rent or otherwise evaluate that property.

In practical terms, disclosure could mean that a rating is shown in sale or lease advertising, included in property information, discussed by real estate agents or made available during the transaction process.

For existing homes, this is important because energy performance has often been invisible. Buyers and renters can usually see location, price, bedrooms and finishes, but they may not know whether the home is likely to be comfortable, efficient or expensive to run.

Why disclosure is developing in Australia

Australia has a large number of existing homes that were built before current energy efficiency expectations. Many of these homes are difficult to heat, difficult to cool or expensive to run.

Without a clear rating, energy performance is hard to compare in the property market. A buyer may not know whether a home has weak insulation, unshaded glazing, air leakage, inefficient systems or upgrade opportunities.

Disclosure helps bring this information into the open so comfort and energy performance can be considered alongside location, layout and appearance.

What does disclosure at sale or lease mean?

Disclosure at sale or lease means that a home’s energy rating could be shared when the property enters the market. This may allow prospective buyers or renters to understand energy performance before making a decision.

NatHERS describes disclosure as a Home Energy Rating being shared publicly with prospective buyers or renters in sale or lease advertising of a home. This is the kind of market-facing information that can support better comparison between properties.

The exact way disclosure is implemented may differ between states and territories as governments move from trials and frameworks into rollout decisions.

Is home energy rating disclosure mandatory in Australia?

Home energy rating disclosure is not yet mandatory across Australia for all existing homes. This is the most important point to state clearly.

However, disclosure is moving from theory into practical trial and rollout planning. National framework work has been prepared, and NSW has been testing how ratings can be used and shared in the sale and lease process.

For the current mandatory-status explanation, see Are Existing Home Energy Ratings Mandatory in Australia?

The role of the national Disclosure Framework

The Home Energy Ratings Disclosure Framework provides a national approach that state and territory governments can use when introducing home energy rating disclosure at sale or lease.

This is important because property markets operate across different jurisdictions. A framework helps align the language, systems and expectations around how ratings may be used, even if each state or territory decides its own implementation pathway.

For homeowners, the framework signals that disclosure is not just a technical assessment issue. It is also a market communication issue.

The NSW Home Energy Rating trial

NSW has been one of the key states testing how home energy ratings can be integrated into the sale and lease process. The NSW and Australian governments have trialled how ratings could be used and shared when properties are sold or leased.

This work is important because disclosure is not only about creating a certificate. It also involves real estate listings, agent training, consumer understanding, data systems, assessor availability and confidence in the rating process.

For Certified Energy clients, this makes NSW a practical early market to watch as disclosure pathways continue to develop.

Why real estate sector readiness matters

For disclosure to work, real estate professionals need to understand what a Home Energy Rating means and how to communicate it accurately.

Ratings need to be presented in ways that buyers, renters, sellers and landlords can understand. A rating should not be treated as just another technical attachment. It needs to help people understand comfort, energy use and upgrade potential in plain language.

This is why agent training, listing systems and consumer education are part of the disclosure conversation.

What disclosure may mean for sellers

For sellers, disclosure may make energy performance more visible during the sale process. Homes with better thermal comfort, lower energy demand or recent upgrades may be easier to explain to prospective buyers.

This does not mean every homeowner needs to rush into upgrades immediately. But it does mean sellers may increasingly want to understand their home’s performance before listing, especially if the property has insulation, glazing, solar, electrification or comfort improvements that should be communicated clearly.

For a buyer and seller-focused article, see What Home Energy Ratings May Mean for Buyers and Sellers.

What disclosure may mean for buyers and renters

For buyers and renters, disclosure may help make comfort and running cost risks more visible before moving in.

A home that looks attractive may still be hot in summer, cold in winter or expensive to operate. Rating information can help buyers and renters ask better questions about insulation, glazing, shading, heating and cooling, hot water, solar and upgrade potential.

Disclosure may not answer every question, but it gives the market a clearer starting point than appearance alone.

What disclosure may mean for landlords

For landlords, disclosure may increase the importance of understanding rental property performance before listing or re-leasing a home.

Energy performance can affect tenant comfort, perceived property quality and future upgrade planning. A rating may help identify whether insulation, draught sealing, glazing, shading, heating, cooling or hot water upgrades should be considered.

As disclosure pathways develop, property managers and landlords may need clearer processes for rating, explaining and improving existing homes.

How NatHERS Existing Homes fits into disclosure

NatHERS Existing Homes provides a pathway for rating established dwellings. This matters because disclosure depends on reliable rating information that can be understood and shared in the market.

A Home Energy Rating can help translate a dwelling’s thermal performance, whole-of-home energy use and upgrade opportunities into information that is easier for homeowners, buyers, renters and property professionals to interpret.

For the pathway definition, see What Is NatHERS Existing Homes?.

Disclosure may change how upgrades are valued

When energy performance is invisible, upgrades can be difficult to communicate. A seller may have improved insulation, shading, hot water or solar, but buyers may not know how those changes affect comfort or running costs.

Disclosure may help make those improvements more legible. Instead of relying only on feature lists, property owners may be able to show rating information that reflects the home’s performance more clearly.

This is one reason home energy ratings could support better retrofit decisions over time.

Voluntary disclosure vs mandatory disclosure

Voluntary disclosure means property owners can choose to share a rating. Mandatory disclosure means a rating must be disclosed under a defined scheme when a property is sold or leased.

Australia is currently in a transition period. Some jurisdictions have existing disclosure arrangements, while broader national and state-level work is still developing for existing homes.

This is why language should remain careful: the direction is toward greater visibility of ratings, but requirements are not yet uniform across Australia.

What homeowners can do now

Homeowners do not need to treat disclosure as a panic deadline. But it is sensible to understand how the home performs, especially before selling, leasing, renovating or investing in upgrades.

Useful preparation may include:

• gathering available plans or property documents
• noting insulation, window or shading upgrades
• recording heating, cooling and hot water system details
• collecting solar or battery information
• identifying rooms that overheat or stay cold
• reviewing draughts, air leakage and comfort problems
• considering a home energy rating before major property decisions

For a preparation checklist, see What Information Do You Need for a Home Energy Rating?

What property professionals can do now

Real estate agents, property managers, buyer’s agents, valuers and conveyancing professionals may all need to become more familiar with home energy ratings as disclosure develops.

Useful preparation may include understanding:

• what a Home Energy Rating measures
• what a rating does not measure
• how rating certificates may be communicated
• what information sellers or landlords may need to provide
• how buyers and renters may interpret ratings
• how upgrade recommendations should be discussed responsibly

The goal is not to turn agents into assessors. It is to help the market communicate energy performance more clearly.

Why market readiness matters

Disclosure is not only a policy change. It is also a market behaviour change.

For disclosure to work well, assessors need to be available, agents need to know how to discuss ratings, homeowners need to understand the process, and buyers and renters need to know what the rating means.

This is why the current transition period is important. It allows systems, training, consumer understanding and professional practice to develop before broader disclosure becomes more common.

How disclosure may support retrofit programs

Home energy rating disclosure can also support retrofit programs by making it easier to identify where homes are underperforming and what upgrades may be most relevant.

A rating can help turn vague comfort complaints into clearer upgrade pathways. It may show whether the home needs insulation, shading, draught sealing, glazing review, system upgrades, hot water improvements, solar or a staged combination of measures.

For a broader policy and program article, see How Home Energy Ratings Could Support Retrofit Programs.

What disclosure does not mean

Disclosure does not mean every existing home instantly becomes non-compliant. It also does not mean every home must immediately be renovated to a particular standard.

A rating is information. It helps show how the home performs and where improvements may be possible. How that information is used depends on the policy setting, property purpose, owner goals and market context.

This distinction matters because homeowners may hear “disclosure” and assume it means immediate mandatory upgrades. That is not the same thing.

Why Certified Energy is watching this space closely

Certified Energy works across residential energy assessment, NatHERS, BASIX, existing home rating pathways and building performance advice. That means disclosure is not just a policy topic. It affects how homeowners, designers, builders, property professionals and assessors understand existing homes.

As home energy ratings become more visible, the market will need clear explanations that separate new-home compliance, existing-home performance, disclosure, renovation advice and retrofit planning.

The goal is not only to produce certificates, but to help people make better decisions about comfort, running costs, upgrades and long-term housing performance.

FAQs

What is home energy rating disclosure?

Home energy rating disclosure is when a home’s energy rating is shared with prospective buyers or renters, usually during the sale or lease process. It helps people understand comfort, energy performance and likely upgrade opportunities before making property decisions.

Is home energy rating disclosure mandatory in Australia?

Home energy rating disclosure is not yet mandatory across Australia. Disclosure pathways are developing, with trials, frameworks and state-led rollout activity helping governments decide how ratings may be shared at the point of sale or lease.

What does disclosure mean at sale or lease?

Disclosure at sale or lease means energy performance information could be made available when a home is advertised, sold or rented. This may help buyers and renters compare homes on comfort, running cost and energy performance.

Why is Australia developing home energy rating disclosure?

Australia is developing disclosure pathways so households can better understand the energy performance of existing homes. This may support more informed property decisions, better upgrade planning and greater market recognition of efficient homes.

How does NatHERS Existing Homes relate to disclosure?

NatHERS Existing Homes provides a pathway for rating the energy performance of established dwellings. These ratings may support future disclosure at sale or lease by giving buyers, sellers, renters and property professionals a clearer performance measure.

Should homeowners prepare for disclosure now?

Homeowners do not need to panic, but it is sensible to understand how their home performs. A home energy rating can help identify comfort issues, upgrade opportunities and performance information that may become more relevant as disclosure pathways develop.

Disclosure Readiness Review

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