Energy Savings Opportunity Scheme (ESOS)

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Stroma Certification’s ESOS Certification Scheme is designed to certify ESOS Lead Assessors in line with the requirements of the Energy Savings Opportunity Scheme (ESOS)

Government Approved

Our ESOS Register is approved by the Environment Agency on behalf of BEIS

Technical Support & Auditing

Our dedicated Commercial team will support you over phone and email

NDEA Certification

Not qualified? Join our commercial scheme today

Stroma Certification’s ESOS Scheme

ESOS is a mandatory energy audit scheme for all qualifying UK organisations who meet a given criteria, namely:

  • Organisations employing at least 250 people
  • Organisations with an annual turnover exceeding €50 million and an annual balance sheet total exceeding €43 million
  • Please refer to the website for more information regarding ESOS compliance criteria

Source: Environment Agency

Why join our ESOS scheme?

ESOS energy audits can only be signed off by a qualified ESOS Lead Energy Assessor. ESOS compliance is mandatory for UK qualifying organisations and by adding your name to our ESOS Lead Energy Assessor Register you are demonstrating your ability to sign off their ESOS compliance work.

Candidates will need to be able to demonstrate sufficient competence in accordance with the requirements of PAS 51215. This includes a minimum length of two years of professional energy assessment and energy audit experience. We'll respond to your application within 72 hours to confirm your pre-assessment and training dates.

The pre-assessment takes place with a member of our ESOS team. It is designed to assess your skillset, analyse your application and measure your experience against the scheme requirements.


“Organisations who meet the criteria must undergo an ESOS audit every 4 years to assess their energy consumption and notify the Environment Agency that they are compliant with the ESOS regulations.”

Dr Steve Marriott, ESOS Scheme Manager

Our Membership Fees

£0 First Year Membership

£1,149 Application Pre-Assessment Training

£250 Annual Membership Renewal

All quoted prices exclude VAT.

For more course dates, please view our Course Calendar

Stroma Certification's ESOS Certification scheme documents are made available to the public, applicants and certified Organisations through a downloadable ESOS Members pack that contains documents including the following:

ESOS Certification Application Form
To be completed for those Organisations requiring certification or alternatively the online application can be completed.

Scheme Handbook
Documents the certification scheme processes for granting, refusing, maintaining, renewing, suspending, restoring or withdrawing certification or expanding or reducing the scope of certification.

Impartiality Policy
Documents Stroma Certification's commitment to ensuring impartiality in all aspects of our certification and business activities. Further information is also available on the Consumer Advice page.

Complaints & Appeals Policy

Documents how a complaint or appeal can be notified to Stroma Certification and how it will be dealt with. Further information is also available on the Consumer Advice page.

Support Policy

Documents the means by which Stroma Certification can be contacted concerning ESOS certification and other business related activities.

Privacy Policy

Documents Stroma’s commitment and procedures for ensuring that the personal data collected and used in our certification and business activities is in accordance with the General Data Protection Regulation (GDPR) requirements. Further information is also available on the Data Protection page.

If you would like clarification on any aspect of the certification process please contact Stroma Certification by emailing or telephone our friendly team on 0345 621 11 11.

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