In 2026, becoming a NatHERS assessor offers one of the most timely and high-growth career opportunities in Australia’s sustainability and construction sectors.
With the Nationwide House Energy Rating Scheme (NatHERS) expanding beyond new builds to include existing homes, demand is rising for both NatHERS for new homes assessors and NatHERS for existing homes assessors. This expansion is opening new pathways into consulting, retrofit planning, building compliance, energy efficiency advisory roles, and more.
This guide explains what a NatHERS assessor does in 2026, why demand is increasing, and exactly how to launch your career, including the essential qualifications, training, and accreditation pathways. We’ll also include the latest updates from NatHERS expansion news so you can jump straight into the opportunities shaping this profession now. Whether you’re a builder, sustainability professional, or career changer, this post provides a complete roadmap.
What Is a NatHERS Assessor?
A NatHERS assessor is an accredited energy professional who evaluates the energy performance of residential homes using NatHERS-accredited software and standards.
Assessors play a critical role in helping clients understand and improve thermal comfort, comply with energy efficiency regulations, and plan upgrades that reduce energy bills.
Importantly, NatHERS now operates across two distinct streams:
NatHERS for New Homes Assessors
- NatHERS for new homes assessors:
- Model architectural designs prior to construction
- Produce star ratings for compliance with the National Construction Code (NCC)
- Support designers and builders to optimise building performance
This stream focuses on proposed dwellings and major renovations.
NatHERS for Existing Homes Assessors
- NatHERS for existing homes assessors:
- Visit completed homes to collect on-site data
- Model current thermal performance
- Provide upgrade recommendations and retrofit pathways
- Support emerging energy disclosure and home improvement frameworks
This stream focuses on already-built homes and homeowner decision-making.
Because both pathways use NatHERS tools but serve different purposes, NatHERS officially refers to them as “NatHERS for new homes” and “NatHERS for existing homes”, including for training, Technical Notes, and accreditation.
Latest NatHERS News & 2026 Expansion Updates
To stay up to date with the scheme’s development and opportunities:
Industry Growth & Training Opportunities
- Expressions of Interest for no-cost NatHERS for existing homes assessor training opened in late 2025, with enrolments and delivery commencing in early 2026
- Expansion is expected to scale nationally through Stage 2 from mid-2026
- Registered Training Organisations are being engaged to support broader delivery of NatHERS for existing homes training throughout 2026
To explore more updates and announcements straight from the administrator, see the official NatHERS News page.
For the most current and authoritative information on NatHERS for existing homes assessor training, accreditation, and resources, NatHERS recommends using the official: NatHERS Assessor Toolkit
Why Become a NatHERS Assessor in 2026?
1. Career Demand Is Increasing
The NatHERS expansion into existing homes means assessors will have more work streams — from new construction compliance to retrofit planning and energy retrofit advisory roles.
2. Cross-Sector Opportunities
Professionals from building, design, sustainability, property, and energy backgrounds can transition into NatHERS roles, including:
- Energy consulting
- Retrofit design advisory
- Sustainability reporting
- Compliance and certification
The clean energy workforce continues to grow rapidly, with around 75% of roles classified as long-term and secure, reflecting sustained demand for performance assessment and optimisation skills.
3. Contribute to Sustainable Homes
Assessors help homeowners reduce energy costs, enhance comfort, and contribute to greenhouse gas reduction — all critical parts of Australia’s built environment strategy.
What Does a NatHERS Assessor Do Day to Day?
New Homes Focus
- Model energy performance based on architectural plans
- Advise builders and designers on compliance with NCC energy requirements
- Produce formal star rating certificates
Watch a day in the life of a Home Energy Efficiency and Sustainability Assessor.
Existing Homes Focus
- Conduct on-site surveys to collect thermal data
- Use accredited software to model whole-home performance
- Provide upgrade recommendations and retrofit pathways
Both roles require professional software proficiency, understanding of building science, and the ability to communicate results clearly to clients.
5 Steps to Become a NatHERS for Existing Homes Assessor in 2026
The steps below relate specifically to the NatHERS for existing homes assessor pathway. Requirements for NatHERS for new homes assessors differ slightly and are outlined in the NatHERS Assessor Toolkit.
Step 1 — Start with the Right Qualification
A strong foundation is the CPP41119 Certificate IV in Home Energy Efficiency and Sustainability or its current equivalent. This nationally recognised qualification teaches:
- Building energy fundamentals
- Thermal performance principles
- Assessment techniques
- Data collection and reporting
Step 2 — Gain NatHERS Software Competency
Assessors must demonstrate competency in at least one NatHERS-accredited software platform (such as AccuRate Enterprise, FirstRate5, or HERO).
- model thermal behaviour
- interpret star ratings and energy use data
- generate compliant assessment reports
Step 3 — Achieve Assessor Accreditation
To issue NatHERS certificates, you need accreditation through a recognised Assessor Accrediting Organisation (AAO):
- Australian Building Sustainability Association (ABSA)
- Design Matters National (DMN)
- House Energy Raters Association (HERA)
These organisations oversee quality assurance, CPD, and professional standards.
Step 4 — Practical Experience and CPD
Real-world assessment experience is highly valuable. Many assessors start within consultancies, build portfolios of jobs, or offer independent services. Maintaining ongoing professional development (CPD) is often required — particularly as the existing homes discipline scales up.
Step 5 — Grow Your Career
Once accredited, pathways include:
- energy consultant for retrofit projects
- sustainability adviser in design firms
- specialist assessor for government or private programs
As NatHERS becomes embedded in energy disclosure and green finance frameworks, new service opportunities continue to emerge.
Frequently Asked Questions
How long does it take to become a NatHERS assessor?
Timeframes vary but generally depend on completing a CPP41119 Certificate IV in Home Energy Efficiency and Sustainability plus software training and AAO accreditation. The current duration for completing the course is 24 months.
Do I need a construction background to become an assessor?
No — professionals from sustainability, design, and energy fields can transition with the right training.
Will NatHERS for existing homes be available Australia-wide?
Yes — the rollout is staged but expected to scale nationally from mid-2026.
How Transformed Supports Your NatHERS Career Pathway
At Transformed, our CPP41119 Certificate IV in Home Energy Efficiency and Sustainability nationally recognised training gives you:
- a solid foundation in building energy performance
- pathways to develop NatHERS software and assessment competencies
- industry-aligned learning for real-world careers
Download the HEES course guide | Book a consultation
Final Thoughts: Your Career in NatHERS Starts in 2026
With NatHERS now expanding to existing homes alongside new builds, 2026 represents a pivotal moment for the profession. With coordinated training pathways and evolving industry needs, you can position yourself at the forefront of Australia’s energy performance transition.