Choosing the Right Energy Rating Consultant

Choosing the right energy rating consultant can have a direct impact on both your compliance outcome and overall project performance.

While many assessments may appear similar on the surface, the approach, experience, and level of detail can vary significantly between consultants.

This guide outlines what to look for — and what to consider before making a decision.

Why the right consultant matters

An energy rating is not just a compliance step.

It influences:

• Design decisions
• Construction outcomes
• Overall building performance

A well-executed assessment can help improve efficiency and avoid unnecessary redesign.
A poor one can lead to delays, added cost, or missed opportunities in the design.

What to look for in an energy rating consultant

1. Relevant experience

Look for a consultant with experience in residential energy assessments, particularly within the NatHERS framework.

This may include backgrounds in:

• Building design
• Architecture
• Engineering
• ESD consulting

Experience in similar project types is often more valuable than general qualifications alone.

2. Capacity and responsiveness

Project timelines often depend on how quickly assessments can be completed.

Consider:

• How quickly they can respond
• Whether they have a team or operate individually
• Their ability to manage revisions if required

A consultant with sufficient capacity can help keep your project moving.

3. Clear communication

Energy assessments involve technical modelling, but the outcome should be clearly explained.

A good consultant should be able to:

• Explain results in practical terms
• Identify key performance issues
• Suggest realistic improvements

Clarity is often more valuable than complexity.

4. Design awareness

Not all consultants approach assessments the same way.

Some focus purely on compliance. Others consider how the design performs as a whole.

Where possible, choose someone who:

• Understands architectural intent
• Can work alongside designers
• Supports performance without overcomplicating the design

5. Proven track record

Past experience can provide insight into how a consultant works.

Look for:

• Consistent delivery
• Client feedback or referrals
• Experience across different project types

What to consider before making a decision

Before engaging a consultant, it can help to clarify:

• What stage your project is at
• Whether you may need design adjustments
• How quickly you need results
• What level of input you expect

This allows you to choose a consultant aligned with your project needs.

Why timing matters

One of the most common issues in energy assessments is timing.

If the assessment is left too late:

• Design changes may be required
• Approval timelines can be delayed
• Costs may increase

Engaging a consultant early can help avoid these issues and improve overall outcomes.

Final note

An energy rating consultant plays a key role in how your project performs — not just whether it complies.

Choosing the right one can make the process more efficient, more predictable, and more aligned with your design.

If you’re planning a project and need to understand requirements, process and costs:

→ 7 Star NatHERS Certificate — what you need to know