Ideal if you're:
Send your plans, drawings or available project information and we'll review what's needed to begin your NatHERS assessment and provide a fixed quote where appropriate.
20,500+
Residential assessments
NatHERS
Accredited assessors
12+ years
Residential rating experience
35+ people
Coordinated national team
You do not need every construction detail finalised before getting started. Send your available plans, drawings and specification notes, and we’ll review what is ready for the NatHERS assessment and what is still missing.
After reviewing your project, you’ll receive:
Why project teams choose Certified Energy
Is this service right for you?
This service is for homeowners, architects, designers and builders who need a plans-based thermal rating for a new home, alteration, addition or residential development.
New homes
Review the proposed home’s orientation, glazing, insulation and construction details before the rating documentation is finalised.
Alterations and additions
Understand whether planned building work may require updated thermal rating documentation for the relevant approval process.
Multi-dwelling projects
Prepare and coordinate NatHERS assessments for dual occupancies, townhouses, apartments and other residential developments.
Where do you start?
A NatHERS rating can be affected by orientation, glazing, shading, insulation, construction type and other design details. Reviewing these elements before the plans are finalised gives your project team more time to respond if further information or changes are needed.
You can send the plans you already have. We’ll review what is available, identify any missing details and explain what needs to happen before the NatHERS assessment can be completed.
Orientation, windows, shading, insulation, roof colour and construction details can all influence the thermal rating.
Plans may still need window specifications, insulation values, construction systems or other details before the rating can be finalised.
If the design does not yet reach the required rating, your project team can review the details that are affecting the result before the documentation is completed.
Understanding your NatHERS assessment
A NatHERS assessment examines how the building fabric, orientation, windows, insulation and construction details influence heating and cooling demand. It focuses on the home's thermal design rather than appliances, solar or battery systems.
Send your available plans and specifications, and we'll confirm whether there is enough information to begin the NatHERS assessment.
SEND YOUR PLANSWe review the available plans, drawings and specifications to understand the proposed home and identify any information still required.
Once sufficient information is available, the home's thermal performance is modelled within the confirmed NatHERS assessment scope.
You'll receive the completed NatHERS rating documentation together with any relevant notes or requests for additional information where required.
What you'll receive
You'll know what information has been assessed, what assumptions have been used and what documentation is ready for your architect, builder, certifier or approval process.
If further information is needed before the rating can be completed, we'll explain exactly what is still required and the next steps.
Item 01
A review of the drawings and project information available to prepare the NatHERS assessment.
Item 02
A completed NatHERS assessment prepared within the confirmed project scope, once sufficient information is available.
Item 03
Where relevant, we'll identify missing information or design details that may affect completion of the rating.
Item 04
Where required, we can work with your architect, designer or builder to help progress the assessment efficiently.
Industry recognition
Your NatHERS assessment depends on clear plans, accurate construction information and practical communication across the project team.
Certified Energy combines experience across thousands of residential assessments with ongoing involvement in the technical development of NatHERS in Australia. This helps your architect, designer or builder receive clear information about what is ready, what is missing and what needs to happen next.
Experience across more than 20,500 residential assessments, including new homes, alterations and multi-dwelling projects.
Represented on the National Technical Advisory Committee supporting the ongoing technical development of NatHERS.
Clear communication with homeowners, architects, building designers, builders and certifiers helps keep the rating aligned with the current project documents.
The assessment is based on the dwelling design, construction details and confirmed project scope—not product sales or preferred suppliers.
How it works
Start with the plans and project information you already have. We'll review what's available, confirm what is needed and guide you through each stage of the NatHERS assessment.
Step 01
Share your available plans, elevations, sections, window schedules, construction details and any certifier comments.
Step 02
We check whether there is enough information to begin the NatHERS assessment and identify any details that are still required.
Step 03
Once sufficient information is available, we complete the NatHERS assessment within the confirmed project scope.
Step 04
You'll receive the completed NatHERS documentation or clear guidance on any remaining information needed before the assessment can be finalised.
Start with what you have
Send the plans, drawings and specifications you already have. We'll review the information, confirm whether it's enough to begin the NatHERS assessment and let you know if anything else is required.
SEND YOUR PLANSFrequently Asked Questions
A NatHERS assessment uses accredited software to model the expected thermal performance of a residential design. It considers the building layout, orientation, windows, insulation, shading and construction details to calculate a star rating for the dwelling.
NatHERS ratings are commonly prepared for new homes, alterations, additions and multi-dwelling residential projects where thermal performance documentation is required for the relevant approval pathway. Your certifier, architect or building designer can confirm the requirements that apply to your project.
Start by sending the plans and project information you already have. This may include floor plans, elevations, sections, a site plan, window schedules, construction details and insulation specifications. We will review the documents and let you know if anything else is needed.
No. You can send the documentation currently available. We will confirm whether there is enough information to begin the assessment and identify any missing details that will be required before the rating can be completed.
The result can be influenced by orientation, room layout, window size and placement, glazing, shading, insulation, roof colour, ventilation and the thermal properties of the proposed construction. The effect of each element depends on the dwelling design and climate zone.
If the design does not yet achieve the required result, we can identify the parts of the model affecting the rating. Your architect, designer or builder can then review suitable design or specification changes before the assessment is finalised.
The NatHERS thermal star rating focuses on how the building design is expected to perform in heating and cooling conditions. Appliances, hot water, solar and other whole-of-home features may be considered under separate project requirements and are not the focus of this assessment service.
Yes. We regularly coordinate with architects, building designers, builders and certifiers to clarify construction information, respond to drawing updates and help progress the NatHERS assessment efficiently.
Send your available plans, drawings and specifications through the form on this page. We will review the information, confirm the assessment scope and provide a fixed quotation where appropriate.
