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
What is the difference between Classroom, Online Live and Self-Study?+
All three training options lead to the same recognised qualification. The difference is simply how the training is delivered, allowing you to choose the learning style that best suits your schedule and preferences.
Classroom Training is ideal for learners who prefer face-to-face teaching in a traditional classroom environment. You'll attend our training centre, work alongside other learners and receive direct support from your tutor throughout the course. This option offers plenty of opportunities to ask questions and gain hands-on guidance.
Online Live Training delivers the same tutor-led experience remotely. You'll join your trainer and fellow learners in live, interactive sessions from the comfort of your home or office. You can ask questions in real time, take part in discussions and receive the same level of tutor support as classroom learners, without the need to travel.
Self-Study (Start Stop Learning) is designed for those who need maximum flexibility. You'll have access to all the learning materials through our online learner portal and can study whenever it suits you. If you need help, you can book video or telephone sessions with one of our tutors, giving you expert support while allowing you to learn entirely at your own pace.
Whichever option you choose, you'll receive the same high-quality training, ongoing tutor support and guidance to help you successfully complete your portfolio and achieve your qualification.
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.
What is the difference between the 3-Day Online DEA course and the 2-Day Weekend DEA course?+
Both courses cover exactly the same Level 3 Domestic Energy Assessor syllabus and lead to the same recognised qualification. The training materials, assignments, portfolio requirements and assessment criteria are identical.
The only difference is how the training is scheduled.
The comparison below shows the difference between the two delivery options.
| 3-Day Course (Weekdays) | 2-Day Course (Weekend) | |
|---|---|---|
| Days | Monday – Wednesday | Saturday – Sunday |
| Start Time | 9:30 am | 8:30 am |
| Finish Time | 3:30 pm | 5:30 pm |
| Daily Training Hours | 6 Hours | 9 Hours |
| Total Duration | 3 Days | 2 Days |
As you can see, the weekend course has longer training days, allowing us to cover the same syllabus in just two days. No topics are omitted or shortened, and every learner receives the same training materials, tutor support and guidance.
Whichever option you choose, you'll complete the same assignments and portfolio before achieving the same recognised qualification.
If weekdays are difficult because of work or other commitments, the 2-day weekend course offers a convenient way to complete your training without taking time off.
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.
