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.

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Taught by working assessors
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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

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Frequently Asked Questions

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.

Can I assess every commercial building after qualifying?+
Not necessarily. Your permitted scope depends on your qualification and accreditation level. More complex buildings may require higher-level competence or different modelling methods.
Do You Need to Join an Accreditation Scheme as a Non-Domestic Energy Assessor?+
Yes. After successfully completing your Non-Domestic Energy Assessor qualification, you must join a government-approved accreditation scheme before you can produce and lodge official Non-Domestic Energy Performance Certificates (EPCs). Accreditation helps ensure assessors meet professional standards and comply with current legislation.

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.