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 you offer tutor support after the course?+
Yes. Supporting you doesn't end when your classroom or online training finishes.
Every learner receives ongoing tutor support while completing their portfolio and assignments. If you need help understanding a topic, using EPC software, collecting evidence or completing an assignment, our experienced tutors are available to guide you.
For learners on our Self-Study (Start Stop Learning) course, you can also arrange video or telephone sessions with a tutor whenever you need additional support.
Even after you've achieved your qualification, we're happy to answer general questions and offer guidance as you begin your career as a Domestic Energy Assessor. Whether you need advice about lodging your first EPC, choosing equipment or understanding the accreditation process, our team is always happy to help.
Our aim is not just to help you gain a qualification, but to give you the confidence and support to succeed in your new career.
Are the Retrofit Assessor courses also City & Guilds approved?+
One of the key advantages of training with Ozone Group Training is the flexibility you'll have once you've qualified.
Unlike some training providers that are linked to a single accreditation scheme, our courses are independent of any one scheme. This means that once you've successfully completed your qualification, you're free to choose the accreditation scheme that best suits your needs, whether that's based on membership fees, support, software, insurance options or additional services.
This gives you the freedom to compare providers and select the scheme that's right for your business or career, rather than being restricted to a single option.
If you're unsure which accreditation scheme to join after qualifying, we'll be happy to explain the available options and help you choose the one that best matches your circumstances.
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.
