NatHERS Assessor: Becoming a Qualified Energy Assessor in Australia
A NatHERS Assessor rates the energy efficiency of homes under Australia’s Nationwide House Energy Rating Scheme (NatHERS). They use approved software to model thermal performance and issue a star rating. Since May 2024, most new homes must meet a 7-star NatHERS standard under National Construction Code 2022.
Steps to become a NatHERS Assessor
Step 1: Complete the Certificate IV in Home Energy Efficiency and Sustainability (CPP41126)
Enrol in the Certificate IV in Home Energy Efficiency and Sustainability (CPP41126) at an accredited RTO or TAFE. Make sure you choose the Thermal Performance Assessment award or the Home Sustainability Assessment and Thermal Performance Assessment award. Only these two awards qualify you for NatHERS accreditation. The course typically takes 6 to 12 months part-time. It covers building thermal science, NatHERS software, energy regulations, and assessment report writing. Note: CPP41126 supersedes CPP41119; both codes remain valid for accreditation.
Step 2: Apply for Accreditation Through a Recognised Assessor Accrediting Organisation
Once you finish your Certificate IV, apply to an Assessor Accrediting Organisation (AAO). The three AAOs for NatHERS new homes assessments are Design Matters, HERA, and ABSA. All three are approved by the NatHERS national office. Each AAO runs quality assurance checks and requires you to follow their code of conduct. This step takes a few weeks. Once approved, you can issue official NatHERS certificates and use the NatHERS logo on your reports.
Step 3: Build Proficiency in NatHERS-Approved Software
Your Certificate IV includes training in at least one NatHERS-approved software tool. The main tools are Hero, FirstRate5, and BERS Pro. Aim to become confident in one tool before you start working, then add a second over time. Your AAO can direct you to endorsed training providers for each tool. Being skilled in multiple software tools makes you more competitive and lets you serve a wider range of clients.
Step 4: Gain Practical Experience Through Real Assessments
Complete real assessments to build your portfolio and your confidence. Many new assessors start by working under an experienced NatHERS assessor or joining a building design firm. Aim to cover a range of projects across different home designs and climate zones. Documented experience strengthens your standing with your AAO and shows potential clients that your assessments are reliable.
Step 5: Maintain Accreditation and Keep Skills Current
NatHERS accreditation requires ongoing professional development (CPD) each year. Your AAO will set the CPD requirements and carry out regular quality audits of your work. Keep up with changes to the National Construction Code, which sets the energy efficiency standards your assessments must meet. Joining industry bodies such as Design Matters or HERA gives you access to training resources, updates, and peer networks.
A NatHERS Assessor spends most of their time reviewing building plans and running them through approved energy software. They issue a star rating out of 10 that shows how well a home manages heat and cold. On any given day, they might check a new home design, write a report, and visit a building site. They check that plans match what is being built. They also stay on top of changing building codes, since energy efficiency rules are updated regularly. It is a varied role that suits detail-focused people who enjoy both technical work and client communication.
A NatHERS Assessor helps make Australian homes more energy efficient. They assess thermal performance, issue star ratings, and guide builders and homeowners on meeting national energy standards. It is a hands-on technical role with strong growth prospects as building codes tighten.
- Rate home energy performance – use NatHERS-approved software to assess building plans and produce a star rating out of 10.
- Write client reports – produce clear, practical reports that explain findings and recommend design improvements.
- Advise builders and architects – help design teams hit the 7-star NatHERS minimum now required under NCC 2022.
- Do site visits – inspect properties to make sure the physical build matches the assessed design documents.
- Keep up with code changes – monitor updates to NatHERS rules, NCC requirements, and state energy policies.
- Handle design changes – re-run assessments when alterations are made to the original building plans.
- Work with clients – explain assessment outcomes in plain language to homeowners who may not have a technical background.
- Maintain accreditation – complete required CPD activities to keep NatHERS accreditation current with your AAO.
To work as a NatHERS Assessor, you need a clear understanding of how buildings perform thermally. This means knowing how insulation, glazing, and ventilation affect a home’s energy use. You will also need to be good with numbers and comfortable using software tools to run energy models.
People skills matter a lot in this role. You will explain your results to clients who are not technical experts, so plain language is essential. Good time management helps you handle multiple assessments at once. A curious mindset and a passion for sustainability will keep you motivated in this fast-growing field.
