What Is an Energy Efficiency Report?
An Energy Efficiency Report (EER) is a document that rates a residential property’s thermal performance using the NatHERS star rating system. Unlike a NatHERS assessment for building compliance, an EER is specifically produced for property disclosure purposes, informing buyers and tenants about the energy efficiency of a home before they commit to a purchase or lease.
The report includes the overall star rating, a breakdown of heating and cooling energy loads, and practical information about the home’s thermal characteristics. Some EER reports also include recommendations for improving the rating through cost-effective upgrades such as insulation, draught sealing, or glazing improvements.
ACT Mandatory Disclosure Requirements
The Australian Capital Territory is the national leader in mandatory energy disclosure for residential properties. Under the Energy Efficiency (Cost of Living) Improvement Act 2012, all residential property sales in the ACT must include a valid EER. Key requirements include:
- Property advertisements — The star rating must be displayed in all property advertisements, including online listings and printed materials.
- Contract disclosure — A copy of the EER must be provided to the buyer before exchange of contracts.
- Rental properties — Certain rental property transactions also require EER disclosure, particularly for new leases.
- Penalties for non-compliance — Failure to obtain or disclose an EER can result in fines and may affect the validity of the sale contract.
Learn more about ACT-specific energy requirements on our ACT energy compliance page.
Beyond the ACT: Growing Trend Towards Disclosure
While the ACT is currently the only jurisdiction with mandatory residential energy disclosure, other states are moving in this direction. Victoria has discussed mandatory disclosure for rental properties, and several state governments are exploring similar schemes. Having an EER prepared now can future-proof your property and add value for energy-conscious buyers.
The EER Assessment Process
When you request a quote through ESD Consultants, we connect you with an accredited assessor who will complete your EER. The process typically involves:
- Documentation review — The assessor reviews any existing plans, building specifications, and previous energy reports. If plans are not available, a site inspection may be needed.
- Site inspection (if required) — For existing homes without documentation, the assessor visits the property to measure dimensions, identify construction materials, and assess glazing, insulation, and ventilation.
- Thermal modelling — Using NatHERS-approved software, the assessor models the home’s thermal performance accounting for the local climate zone, building materials, orientation, and design features.
- Report delivery — You receive your EER certificate with the star rating, energy load breakdown, and (where applicable) improvement recommendations. Typical turnaround is 3–7 business days.
EER Costs and Turnaround
The cost of an Energy Efficiency Report depends on the property type, size, and whether plans are available:
- Standard house with plans: $300–$450
- House requiring site inspection: $450–$600
- Apartment or unit: $250–$400
- Urgent turnaround: Add $100–$200
Most EERs are delivered within 3–7 business days of receiving all required documentation or completing the site inspection. For detailed pricing, see our energy rating cost guide.
How to Improve Your EER Before Selling
If your property’s star rating is lower than you’d like, there are cost-effective upgrades that can improve it before you list. Common improvements include:
- Adding or upgrading ceiling insulation (often the single biggest improvement)
- Installing draught seals on doors and windows
- Upgrading single-glazed windows to double glazing
- Adding wall insulation where accessible
- Installing external shading on west-facing windows
A home energy audit can help identify the most impactful upgrades for your specific property.
Frequently Asked Questions
What is an Energy Efficiency Report (EER)?
An Energy Efficiency Report is a document that discloses a residential property's energy efficiency star rating based on the NatHERS (Nationwide House Energy Rating Scheme) assessment methodology. It is primarily required in the ACT for property sales and certain lease transactions.
Is an EER the same as a NatHERS assessment?
An EER uses the NatHERS methodology to determine the star rating but is specifically formatted for mandatory disclosure purposes. A NatHERS assessment for building compliance and an EER for property disclosure use similar assessment processes but serve different regulatory purposes.
How much does an Energy Efficiency Report cost?
An EER for a standard home in the ACT typically costs between $300 and $600. The cost depends on the dwelling size, complexity, and how much documentation is available about the building's construction. Homes with existing plans cost less to assess than those requiring a site inspection.
How long is an EER valid?
An EER remains valid for 10 years in the ACT, unless significant modifications are made to the building envelope (such as adding insulation, replacing windows, or extending the home). After modifications, a new assessment is recommended to reflect the updated rating.
What happens if I sell without an EER in the ACT?
Selling a residential property in the ACT without a valid EER is an offence under the Energy Efficiency (Cost of Living) Improvement Act 2012. Penalties apply, and contracts may be affected. The EER must be disclosed in property advertisements and provided to prospective buyers.