ESOS Energy Audit

The ESOS Energy Audit is a mandatory energy assessment and energy-saving identification scheme for large organisations in the UK. At Celtic Dynamics, we provide ESOS audit reports that deliver meaningful insights to drive long-term energy savings and operational efficiency as well as ensuring compliance and avoidance of fines.

Stay compliant. Save energy. Cut costs.

What is the ESOS Energy Audit?

ESOS is a legal requirement under UK law for organisations that meet the qualification criteria (250+ employees or an annual turnover above £44 million). Every four years, eligible businesses must conduct an audit of their total energy consumption — across buildings, industrial processes, and transport — and identify cost-effective energy-saving opportunities.

Our ESOS Energy Audit Service Includes:

1

Full Energy Review

We assess your total energy consumption (in kWh), covering buildings, operations, and transportation.

2

On-Site Energy Surveys

Celtic Dynamics carries out ESOS compliant energy audits on your significant energy consumption areas.

3

Costed Recommendations

Clear, actionable proposals for cost-effective energy efficiency improvements — with ROI projections to help you prioritise action.

4

Compliance Documentation

We handle the full audit report preparation and assist with the submission to the Environment Agency, with a clear audit trail for internal and external records.

Why Choose Celtic Dynamics?

We combine technical rigour with strategic insight. Our ESOS Energy Audits don’t just meet regulatory obligations — they help your business:

Lower energy costs
Improve carbon performance
Uncover quick-win and long-term efficiency projects
Build resilience into your operations

We’ve worked with manufacturers, tech firms, logistics companies, and multi-site retailers across the UK, tailoring each audit to your operations and sustainability goals.

Maximise Your Energy Audit Insights

Many businesses complete an ESOS audit but fail to take full advantage of the results. At Celtic Dynamics, we help you go beyond compliance by transforming audit recommendations into practical, energy-saving actions. Whether you’re preparing for the next phase of UK reporting or aiming to reduce operational costs, our approach ensures that audit findings lead to measurable improvements. With expert guidance, your organisation can prioritise projects, track impact, and make meaningful progress on long-term sustainability goals.

Bridging Compliance and Climate Responsibility

Achieving ESOS compliance is not just about ticking a regulatory box, it’s about using the audit as a strategic tool to improve your organisation’s energy profile. The insights gained through a UK energy audit under the Energy Savings Opportunity Scheme can serve as a launchpad for Net Zero strategies, carbon reporting initiatives, and wider ESG goals. Our consultants help connect your ESOS findings with broader sustainability ambitions, making it easier to align compliance with carbon reduction, energy management systems, and board-level reporting. With increasing scrutiny from investors, regulators, and supply chain partners, demonstrating proactive energy management through schemes like ESOS can strengthen both your operational resilience and your reputation.

CEO

Dylan Walsh

Ready for ESOS Phase 4?

Whether you’re preparing for your first ESOS audit or want to build on previous phases, Celtic Dynamics can guide you through every step. Our audit process is designed to reduce disruption and deliver clarity, fast. From initial scoping to final submission, we provide a seamless, fully managed service tailored to your business. Our experienced consultants work closely with your team to ensure all compliance obligations are met while identifying practical energy-saving opportunities. We prioritise clear communication, accurate data analysis, and actionable recommendations, so you can make informed decisions with confidence. Let us help you stay compliant, cut costs, and drive long-term efficiency.