from idea to realization
Energy Efficiency Assessor for Australian Homes
ILLUSTRATIVE DESIGN
Make informed design decisions and progress your residential project with a professional energy efficiency assessment.
Sustainaspace provides energy efficiency assessments for new homes, renovations and residential developments across Australia. Our assessors examine how the proposed building design responds to its climate and identify practical ways to improve thermal comfort, energy performance and compliance.
Whether you are a homeowner, building designer, architect, developer or builder, we provide clear reporting and straightforward recommendations that can be applied to your project.
Residential Energy Efficiency Assessments
A residential energy assessment evaluates how effectively a home maintains comfortable internal temperatures throughout the year.
Using approved assessment methods and project documentation, we review the elements that influence the thermal performance of the building, including:
- Building orientation and layout
- External walls, floors and roofing
- Insulation levels
- Window sizes, locations and glazing types
- Shading and solar exposure
- Ventilation and air movement
- Local climate conditions
- Heating and cooling loads
The assessment can help demonstrate compliance while identifying improvements that may make the home more comfortable and economical to operate.
NatHERS Energy Ratings
The Nationwide House Energy Rating Scheme, commonly known as NatHERS, provides a standard method for assessing the thermal performance of Australian homes.
A NatHERS assessment uses accredited software to model the expected heating and cooling needs of a proposed dwelling. The result is expressed as a star rating, with a higher rating representing better thermal performance.
Sustainaspace can complete NatHERS assessments for:
- New detached homes
- Townhouses and grouped developments
- Apartments
- Alterations and additions
- Residential development applications
- Designs requiring performance improvements
Our recommendations consider the project’s design intent, budget and construction requirements. The objective is to achieve a workable result—not simply add expensive specifications to a drawing.
When Should You Engage an Energy Efficiency Assessor?
Energy performance should be considered as early as possible.
Engaging an assessor during the design stage gives your project team more freedom to adjust orientation, glazing, shading, insulation and material selections. Changes made early are generally easier and less disruptive than changes introduced immediately before approval or construction.
We can also assess a developed design and recommend targeted changes where the required performance level has not yet been achieved.
Our Energy Assessment Process
Simple, transparent and easy to follow
Send Us Your Project Documents
Provide the available floor plans, elevations, sections, window information and construction specifications. If some information is missing, we will identify what is required.
Building Performance Assessment
We model and review the proposed building to understand its expected thermal performance and compliance position.
Practical Recommendations
If improvements are required, we assess suitable changes to insulation, glazing, shading, building materials or other relevant design elements.
Final Report and Documentation
Once the design satisfies the applicable requirements, we prepare the required assessment documentation for your project team or approval process.
Why Choose Sustainaspace?
More Than 20 Years of Industry Experience
Our building and design experience allows us to consider both compliance and the practical implications of proposed changes.
Clear, Actionable Advice
We explain what needs to change, why it matters and how the requirement can be addressed.
Design-Focused Solutions
Recommendations are developed with consideration for construction cost, appearance and the original design intent.
Australia-Wide Service
With a presence in Perth and Sydney, Sustainaspace supports residential projects throughout Australia.
Integrated Building Services
Our broader capabilities include architectural drafting, design consultation, 3D rendering and commercial energy assessments, allowing us to support multiple stages of a project.
Frequently Asked Questions
An energy efficiency assessor examines the thermal performance of a building. For residential projects, this may involve NatHERS modelling, compliance documentation and recommendations relating to insulation, glazing, shading and construction materials.
We generally require floor plans, elevations, sections, window schedules and construction details. The exact documents depend on the type and stage of the project.
Yes. We can investigate practical design or specification changes that may improve the building’s thermal performance.
The timeframe depends on the project’s size, complexity and the completeness of the supplied documentation. We will confirm the expected turnaround after reviewing your plans.
Yes. Our energy efficiency assessment services are available for suitable projects throughout Australia.
A clear next step for your project
Speak With an Energy Efficiency Assessor
Send Sustainaspace your plans for an initial review and quotation. We will confirm the information required, the appropriate assessment service and the expected timeframe.