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
Practical Support
Assignments & portfolio guidance included
5.0Google Rating
500+ Learners Trained in Just Last Year
Ongoing Portfolio Support
City & Guilds Approved Centre
Industry-recognised UK qualification
Experienced Tutors
Taught by working assessors
Online Learning Materials
Comprehensive study resources & portal access
Portfolio Support
Hands-on assignment guidance
Upcoming Course Dates
Limited places available – book early to secure your spot!
View Calendar
Join 1000+ successful
assessors trained with us!

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

Real reviews from our Google profile

Frequently Asked Questions

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 I Need Previous Construction Experience?+
Not necessarily. Previous experience in construction, surveying, engineering or property can be helpful, but it is not always required. You will still need to complete the appropriate Non-Domestic Energy Assessor qualification and demonstrate the required competence. Relevant industry experience may allow some learners to follow a faster training route or receive recognition for prior learning. Entry requirements vary, so check the requirements of the specific course before enrolling. 
Do I need prior experience?+
No prior experience required. You need good literacy/numeracy and basic IT skills.

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.