Build Your Career inEnergy Assessment & Building Compliance
City & Guilds approved training in Domestic EPCs, Retrofit, SAP, Non-Domestic Energy Assessment and more. Flexible learning. Expert tutors. Real-world support.
Featured Courses
Our most popular Energy Assessor qualifications

Self-Paced Domestic Energy Assessor Course | Guided Online Level 3 DEA Training

3-Day Online Domestic Energy Assessor Course | Live Level 3 DEA Training

2-Day Weekend Domestic Energy Assessor Course | Live Online Level 3 DEA Training
Upcoming Course Dates
Live availability across all our courses

Why Choose Ozone Training
We're working Energy Assessors who train new assessors — not a generic training company.
- Run by practising DEAs since 2011
- City & Guilds approved courses
- Real-world tips, not just exam-pass content
- Spread cost in interest-free instalments
- 100% pass guarantee with free re-sits
What Our Learners Say
Real reviews from our Google profile
Frequently Asked Questions
How do I become a working Energy Assessor after the course?+
Once you've successfully completed your qualification, there are just a few simple steps before you can start carrying out Energy Performance Certificates (EPCs) professionally.
Once you're accredited and insured, you'll be able to lodge EPCs on the national register and begin working as a Domestic Energy Assessor.
Many of our learners choose to become self-employed, while others work for EPC companies, estate agents, housing associations, local authorities or property consultancies. The qualification offers flexibility, allowing you to work full-time, part-time or alongside your existing career.
At Ozone Group Training, our support doesn't stop when you qualify. We'll guide you through the accreditation process, advise you on the equipment you'll need and answer any questions you have as you take your first steps into the industry. Our aim is to help you become not only qualified, but also confident and ready to start working as a Domestic Energy Assessor.
Do I Need Previous Construction Experience?+
What is the process from enrolling on the course to receiving my qualification?+
We've designed our training process to be straightforward and supportive, guiding you from enrolment through to becoming a qualified Energy Assessor.
First, you'll complete your chosen training course. This may be through Classroom Training, Online Live Training or Self-Study (Start Stop Learning), depending on the option you've selected.
After your training, you'll complete the required assignments and portfolio as part of your qualification. Your dedicated tutor will review each submission and provide feedback if any amendments are needed. Once an assignment meets the required standard, it will be signed off by your tutor.
When all of your assignments have been successfully completed and signed off, your portfolio is passed to our Internal Quality Assurer (IQA). The IQA carries out quality assurance checks to ensure your work meets the awarding body's requirements and that the assessment process has been completed correctly.
Once the IQA has completed the quality assurance process and your portfolio has been fully signed off, your qualification is claimed from the awarding organisation. Your certificate is typically issued within two weeks of the final sign-off.
Throughout the entire process, our tutors are available to support you, answer your questions and help you progress towards successfully achieving your qualification.
Ready to start your DEA career?
Speak to our team or book your course today. We'll guide you from enrolment to your first paid EPC.
