If you’re passionate about sustainability, building design, or simply want a rewarding career that’s growing fast in Australia, becoming a NatHERS Assessor might be the perfect move for you.
NatHERS (Nationwide House Energy Rating Scheme) Assessors play a vital role in helping design more energy-efficient homes. With rising demand for better-performing buildings and stricter energy standards in 2025, there’s never been a better time to step into this exciting career.
In this blog, we’ll unpack what a NatHERS Assessor does, why the role matters, and most importantly, how to become one in 2025. Plus, hear first-hand from Michael and Henry, about why this career is more achievable than you might think. Watch Michael Young, Founder & CEO of Transformed, and Henry Rong from LiveSwitch discuss NatHERS here: video link
Table of Contents
- What Is a NatHERS Assessor?
- Why Is Demand Growing in 2025?
- What Does a Typical Day Look Like for a NatHERS Assessor?
- How to Become a NatHERS Assessor in 2025
- How Long Does It Take to Become a NatHERS Assessor?
- What Skills Do You Need to Succeed as a NatHERS Assessor?
- Real Stories: Why Students Love Becoming NatHERS Assessors
- Career Outcomes for NatHERS Assessors in 2025
- FAQs About Becoming a NatHERS Assessor
What Is a NatHERS Assessor?
A NatHERS Assessor is a trained professional who uses accredited software to model the energy performance of residential homes. They provide an energy efficiency star rating — similar to those you see on appliances — which reflects how comfortable and energy-efficient a home will be once built.
In simple terms:
It help design homes that stay cooler in summer, warmer in winter, and cost less to run.
The star rating they provide is critical for:
- Building approvals (meeting minimum energy requirements)
- Homeowners who want better energy performance
- Builders and architects needing expert advice
- Supporting Australia’s carbon reduction goals
Why Is Demand Growing in 2025?
Several major factors are driving more opportunities for NatHERS Assessors:
- 7-Star Requirements: As of 2024-2025, the National Construction Code (NCC) now mandates a minimum 7-star energy rating for new homes.
- Sustainability Focus: Both governments and homeowners are more climate-conscious.
- Energy Costs: Australians are demanding homes that are cheaper to heat and cool.
- Renovation Boom: More people are retrofitting older homes for energy efficiency.
Translation? Builders, designers, and certifiers NEED accredited NatHERS Assessors more than ever before.
What Does a Typical Day Look Like for a NatHERS Assessor?
Your workday might include:
- Reviewing architectural plans and construction drawings
- Using NatHERS-accredited software (e.g., FirstRate5, AccuRate, HERO)
- Inputting data about building materials, window sizes, insulation, and more
- Running simulations to calculate energy performance
- Advising on design tweaks to improve the rating
- Issuing official energy rating certificates
You might work independently, with a consultancy firm, for a builder, or even start your own assessment business.
How to Become a NatHERS Assessor in 2025
The good news? The pathway is clearer than ever.
Here’s a step-by-step guide on how to become one:
1. Complete the Required Training: CPP41119 Certificate IV in Home Energy Efficiency and Sustainability
The CPP41119 Certificate IV in Home Energy Efficiency and Sustainability is the nationally recognised course you’ll need.
It covers everything you must know, including:
- Building science fundamentals
- Energy rating regulations and software
- Construction methods
- How to perform accurate assessments
At Transformed Pty Ltd, our course is delivered flexibly online, making it perfect for career changers, full-time workers, or regional students.
Pro Tip: Choose a course provider like Transformed who offers interactive, hands-on training — it’s the best way to build real-world skills and confidence.
2. Join a NatHERS Assessor Organisation
Next, you must become a member of an Assessor Accrediting Organisation (AAO).
The approved AAOs include:
- Australian Building Sustainability Association (ABSA)
- Design Matters National (DMN)
- Home Energy Raters Assocation (HERA)
You need to obtain Professional Indemnity Insurance in order to become Accredited
Each AAO will have slightly different membership requirements but your Certificate IV ticks the big boxes.
3. Start Assessing!
Once accredited, you’re ready to start providing energy assessments and issuing official certificates.
Many NatHERS Assessors:
- Work as independent consultants
- Partner with architects or builders
- Offer extra services like BASIX assessments (NSW), thermal performance advice, or retrofit planning
How Long Does It Take to Become a NatHERS Assessor?
With Transformed, many students complete their training and software accreditation in as little as 6 to 9 months.
Alternatively, if you study part-time or have work or family commitments, you can spread it out over a longer period — after all, the course is designed to fit around your life.
What Skills Do You Need to Succeed as a NatHERS Assessor?
While you don’t need a construction or design background (many students don’t!), you’ll thrive if you have:
- Strong attention to detail
- An interest in sustainability and energy efficiency
- Basic computer skills
- Good communication (you’ll liaise with builders and designers)
- A curious mind — you’ll constantly learn about new materials, methods, and software tools
Our trainers at Transformed are experts at helping you build both the technical AND professional skills you need to shine.
Real Stories: Why Students Love Becoming NatHERS Assessors
Hear it from Michael and Henry who talks about NatHERS in this video.
They talk about:
- Why chose NatHERS
- How flexible study made it achievable
- The satisfaction of helping homeowners build better, greener homes
“It’s a career where you genuinely make a difference.
Michael Young | Founder & CEO of transformed
Every project is a chance to create more comfortable, sustainable housing.”
Career Outcomes in 2025
Once accredited, your career options open wide:
- Residential Energy Rater/Consultant
- Sustainability Consultant
- Thermal Performance Assessor
- Home Energy Efficiency Advisor
- Energy Compliance Officer (Council/Regulatory Bodies)
With energy efficiency only becoming more important, many Assessors are booked out months in advance.
FAQs About Becoming a NatHERS Assessor
1. Do I need a construction or architecture background to become a NatHERS Assessor?
No, not necessarily. In fact, many successful NatHERS Assessors come from diverse backgrounds, including teaching, administration, and environmental sciences. The key is a willingness to learn and a passion for sustainability.
2. How much does it cost to become a NatHERS Assessor?
Course fees for the Certificate IV vary depending on your provider and eligibility for subsidies. After completing your course, there are additional costs for software training, accreditation membership, and insurance. Contact Transformed for a tailored quote and funding options!
3. Which software do NatHERS Assessors use?
You’ll need to become proficient in at least one accredited software tool such as FirstRate5, AccuRate, or HERO. Your trainers will help you choose based on your career goals and preferences.
4. Can I work part-time as a NatHERS Assessor?
Absolutely. Many Assessors freelance, work part-time, or consult alongside other careers like building design or sustainability consulting.
5. How soon can I start earning after becoming accredited
After finishing your Certificate IV and gaining accreditation through an AAO, many graduates start consulting within 6–12 months. With demand rising, especially after the 7-star mandate, you’ll find plenty of opportunities to build a client base quickly.
Ready to Start Your NatHERS Career?
If you’re wondering how to become a NatHERS Assessor in 2025, the answer is simple:
Enrol in the CPP41119 Certificate IV in Home Energy Efficiency and Sustainability with a trusted training partner like Transformed.
Get hands-on experience, professional support, and confidence to launch your new career.
Don’t wait. Australia needs more skilled NatHERS Assessors now — and your future clients are already building.
Learn more and enrol today: Explore the NatHERS Assessor Course
Questions? Our team is here to help. Call 1800 999 399 or email [email protected].