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 long does it take to qualify after completing the Domestic Energy Assessor (DEA) course?+
The time it takes to achieve your Level 3 Domestic Energy Assessor qualification depends on the training option you choose and how quickly you complete your portfolio.
There is no fixed deadline to complete your portfolio within your course access period, so you can work at a pace that suits your schedule. However, learners who stay engaged and complete a little each day typically qualify much sooner.
Our aim is not simply to help you pass the course, but to ensure you leave with the knowledge, practical skills and confidence to carry out domestic Energy Performance Certificates (EPCs) professionally from day one.
Do I Need Previous Construction Experience?+
Do you issue hard copy certificates?+
Awarding organisations now issue digital certificates for most qualifications, which are widely accepted by employers, accreditation schemes and other organisations throughout the UK.
Your digital certificate is secure, easy to store and can be downloaded and shared electronically whenever proof of your qualification is required.
If you would like a professionally printed hard copy, we can arrange this for an additional fee. Once your qualification has been fully signed off, you'll receive a sign-off email containing details of how to request a printed certificate and the applicable postage and administration charges.
If an official hard copy certificate is available from the awarding organisation, we'll provide you with all the available options in your sign-off email, allowing you to choose the option that best suits your needs.
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.
