ESOS assessments in London
Ensure your business meets ESOS Phase 4 obligations with expert guidance from a certified ESOS Lead Assessor in London.
Helping large organisations reduce energy use
If your organisation meets the criteria for ESOS Phase 4, it's not just about ticking a regulatory box - it's an opportunity to uncover real energy savings. At Haptic EPC, we provide insightful, fully compliant ESOS assessments that cut through the jargon and deliver practical recommendations. We're based in London and led by a qualified ESOS Lead Assessor with extensive experience across commercial buildings, transport, and industrial processes.
What is ESOS?
The Energy Savings Opportunity Scheme (ESOS) is a mandatory energy assessment scheme for large UK organisations and is overseen by the Environment Agency. It requires qualifying businesses to:
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Measure total energy consumption across buildings, transport and production processes.
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Conduct detailed energy audits to identify cost-effective savings.
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Report compliance to the Environment Agency every four years.
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ESOS applies across the UK and is currently in Phase 4, with a compliance deadline of 5th December 2027.
Do I need to comply with ESOS?
You must take part in ESOS if, on the qualification date - 31st December 2026, your organisation:
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Employs 250 or more people
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Has an annual turnover above £44 million and an annual balance sheet total above £38 million.
These rules also apply to corporate groups and UK subsidiaries of overseas companies. Not sure if you're in scope? We can help you check.
What’s involved in an ESOS Assessment?
To comply with ESOS, your organisation will need to:
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Appoint an ESOS Lead Assessor recognised by the Environment Agency. They will in turn:
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Measure your total energy consumption.
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Identify areas of significant energy usage (at least 95% of your total).
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Undertake compliant energy audits, covering buildings, transport and industrial processes.
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Produce recommendations for reducing energy use and improving efficiency.
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Review and produce an overall ESOS report.
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Get the report signed-off at board level.
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Assist you in submitting a compliance notification to the Environment Agency.
We take care of the entire process, from scoping the project and site auditing to producing the final report for you to submit to the EA.
Why choose Haptic for your ESOS audit?
We’re not a faceless consultancy. Haptic EPC is a trusted name in energy assessment, known for refreshing clarity, attention to detail and friendly service. When you work with us, you get:
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A qualified ESOS Lead Assessor registered with Elmhurst Energy and recognised by the Environment Agency.
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Local expertise based in London but working nationwide.
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Honest, practical advice on energy and cost saving measures.
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A wealth of experience across retail, leisure, warehousing, offices and more.
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Integration with EPC, SECR, BREEAM, BRUKL/SBEM and other environmental compliance programmes.
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Transparent pricing.
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Whether you need a full audit, are confused about your organisation's status regarding ESOS or need help reviewing existing data, we’ll make sure you meet your legal duties without overcomplicating things.
Penalties for Non-Compliance
Failing to comply with ESOS can result in significant penalties from the Environment Agency. These include:
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Fixed penalties of up to £50,000 per infringement (stackable).
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Additional daily fines of up to £500 per day (for up to 80 days).
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Publication of non-compliant status on the Government’s website.
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Enforcement notices requiring you to take immediate action.
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Failure to undertake audits, maintain adequate records, or submit a compliance notification by the deadline can all trigger enforcement penalties. It’s far more cost-effective, and reputationally safer, to get ahead of the deadline and comply fully.
When is an ESOS Lead Assessor not required?
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If your organisation’s total energy consumption is less than 40,000 kWh during the compliance period. In this case, two board-level directors must review and sign off your assessment instead.
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If 100% of your energy use is covered by a valid ISO 50001 certification. This is considered a complete alternative route to compliance and no Lead Assessor is required in that case.
Who is exempt from ESOS?
Organisations below the financial & staffing thresholds outlined above.
Public bodies are not required to comply with ESOS if they are classified as public bodies under the Public Contracts Regulations 2015 (or Scottish equivalents), and they do not operate as an “undertaking” i.e. they are not engaged in economic activity on a commercial basis. This includes:
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Local authorities
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NHS trusts
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Government departments
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Most universities and publicly funded schools
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However, public sector organisations may be required to comply if:
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They are trading arms or subsidiary companies of public bodies, and
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They meet the ESOS criteria for large undertakings (e.g. 250+ employees, £44m+ turnover and £38m+ balance sheet total)
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These subsidiaries are considered “undertakings” and therefore must comply with ESOS unless they are fully covered by an ISO 50001-certified energy management system.
What happens next?
Here’s how the process works with an ESOS assessment with Haptic:
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Free consultation, we confirm whether your business qualifies for ESOS, outline your obligations and how we can add value.
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Data collection and site audits, we review energy use and build energy consumption profiles.
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Report and recommendations - clear, actionable and costed advice on how to reduce energy overheads including life-cycle cost analysis (LCCA) of proposals.
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Board-level review and sign-off, we’ll present our findings and guide you through every step.
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Submission and support – we prepare your evidence pack and help you submit the compliance notification and outline your action plan and annual reviews going forward.
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We’re with you from start to finish, no guesswork, no stress.
Book an ESOS Consultation Today
The sooner you start, the more time you’ll have to gather data, plan site visits and benefit from early energy-saving actions. Whether you’re preparing for your first ESOS audit or looking to improve on previous phases, we can help.
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Contact us now to book a consultation with a qualified ESOS Lead Assessor.