Energy Saving Opportunity Scheme

ESOS compliance requirements

Organisations covered by the ISO 50001 energy management standard do not need to complete any additional assessments or audits. They merely need to notify the Environment Agency that they comply with ESOS by this route.

Other organisations covered by ESOS need to conduct an ESOS assessment.

This includes:

  • measuring their total energy consumption
  • identifying their areas of significant energy consumption (at least 90% of the total)
  • selecting a route to compliance in respect of each area of significant energy consumption
  • undertaking the activity to comply via this route - these include ESOS-compliant energy audits, certified ISO 50001 coverage, a Green Deal Assessment or a Display Energy Certificate
  • appointing an ESOS Lead Energy Assessor to undertake, oversee or review their audits and overall assessment.


View timescales for ESOS compliance notification and how to become an ESOS Lead Energy Assessor

My IChemE

IChemE is a registered charity in England & Wales (214379), and a charity registered in Scotland (SC 039661).