About ESOS

ESOS is an energy assessment scheme that is mandatory for organisations in the UK that meet the qualification criteria. The Environment Agency is the UK scheme administrator.

Organisations that qualify for ESOS must carry out ESOS assessments every 4 years. These assessments are audits of the energy used by their buildings, industrial processes and transport to identify cost-effective energy saving measures.

By 5 December 2015, qualifying organisations must carry out their ESOS assessment and notify the Environment Agency.

Participants must then carry out an ESOS assessment in each 4-year compliance period, ending on 5 December 2019, 2023 and so on.


Check if you need to comply

ESOS applies to large UK undertakings and their corporate groups. It mainly affects businesses but can also apply to not-for-profit bodies and any other non public sector undertakings that are large enough to meet the qualification criteria.

Your organisation qualifies if, on 31 December 2014, it meets the ESOS definition of a large undertaking.


Large undertaking

A large undertaking is an organisation that carries out a trade or business which:
employs at least 250 persons; or
employs fewer than 250 persons but has an annual turnover in excess of 50 million euro and an annual balance sheet in excess of 43 million euro.

If you qualify for ESOS and your organisation is fully covered by ISO 50001 you don’t need to carry out an ESOS assessment. You just need to notify the Environment Agency that this is the case and you are compliant with ESOS.

If you qualify for ESOS, but your organisation is not fully covered by ISO 50001 you will need to carry out an ESOS assessment. 


Appoint a Lead Assessor

You need to appoint a lead assessor to carry out, oversee or review your energy audits and overall ESOS assessment.

Adam Grundy BSC MRICS is an ESOS Lead Assessor and an ISO 50001 Lead Assessor

What next?

Email us with some details for a quote, or call us on 01159 414 959 to discuss your requirements.