0203 488 2554 training@ozonegroup.co.uk

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.

Expert Tutors
Learn from industry professionals
Flexible Learning
Classroom, online live & guided learning
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Assignments & portfolio guidance included
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Ongoing Portfolio Support
City & Guilds Approved Centre
Industry-recognised UK qualification
Experienced Tutors
Taught by working assessors
Online Learning Materials
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Portfolio Support
Hands-on assignment guidance
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Featured Courses

Our most popular Energy Assessor qualifications

Why Ozone

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

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Frequently Asked Questions

Can I claim my CPD hours from your modules?+

Yes. Ozone Group Training is an accredited CPD provider, and our CPD courses are approved by The CPD Group and listed on the CPD Register.

On successful completion of a course, you'll receive a CPD Certificate of Completion showing the number of CPD hours awarded. You can use this certificate as evidence of your Continuing Professional Development (CPD) when maintaining your membership with your accreditation scheme or professional body.

Our CPD courses are designed to provide practical, up-to-date knowledge that helps Energy Assessors and other built environment professionals stay informed about industry changes, legislation and best practice.

As CPD requirements can vary between accreditation schemes and professional organisations, we recommend checking their current requirements. However, because our courses are accredited by The CPD Group and published on the CPD Register, you can be confident that you're completing recognised, high-quality CPD training.

If you're unsure whether a particular course is suitable for your CPD requirements, our team will be happy to advise you before you enrol.

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.

Classroom Courses:
If you attend one of our classroom-based Domestic Energy Assessor courses and have completed all the required assignments before or during the course, your portfolio can often be reviewed and signed off during the classroom session itself. This is the fastest route to qualification for learners who arrive fully prepared.

Online Courses:
For our online training, you complete your portfolio after your live online sessions. Most learners who dedicate 2 to 3 hours per day to their assignments can realistically complete everything within around one week. Once your portfolio has been submitted, your assessor will review your work and provide feedback where required. If any amendments are needed, you'll receive clear guidance and can resubmit your work.

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.

Are the Retrofit Assessor courses also City & Guilds approved?+
Yes — both Level 2 and Level 4 Retrofit Assessor qualifications are City & Guilds approved, giving you a nationally recognised qualification that meets industry standards.

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.