ESOS Lead Assessor

The Energy Savings Opportunity Scheme (ESOS) is a mandatory energy assessment scheme in the UK for large organisations.

It requires businesses to measure and audit their energy use and identify cost effective opportunities to improve efficiency across their operations.

Who Qualifies for ESOS

ESOS applies to large organisations in the UK that meet one or more of the following criteria:

• 250 or more employees

• Annual turnover exceeding £44 million and a balance sheet total over £38 million

It also applies to groups of companies where the overall organisation meets these thresholds.

What ESOS Covers

ESOS assessments review energy use across:

• Buildings

• Transport

• Industrial processes

The aim is to provide a clear understanding of where energy is being used and where improvements can deliver the greatest impact.

Why It Matters

ESOS is not just a compliance requirement. It provides a structured approach to:

• Identify significant energy costs

• Reduce consumption across operations

• Lower carbon emissions

• Improve overall efficiency

Done properly, it highlights practical opportunities that can deliver measurable savings.

How 3CO Limited Can Help

3CO Limited provides ESOS support for organisations operating in the UK, including:

• ESOS compliant energy audits

• Identification of cost effective improvement measures

• Guidance on regulatory requirements and submission

• Practical advice tailored to your operations

As a Lead Assessor, we ensure your ESOS submission is compliant while focusing on measures that are realistic and deliver value.

Next Steps

If your organisation qualifies for ESOS or you are approaching a compliance phase, the first step is to review your energy use and assessment requirements.

Get in touch to discuss your organisation and how we can support your ESOS compliance.