ESOS Audit provides ESOS Phase 4 assessments and compliance support for large UK organisations that need to meet the requirements of the Energy Savings Opportunity Scheme.

We can help determine whether your organisation qualifies, calculate total and significant energy consumption, complete the required energy audits and prepare your business for ESOS Phase 4 compliance.

The ESOS Phase 4 qualification date is 31 December 2026, with qualifying organisations required to submit their notification of compliance by 5 December 2027.

If your organisation requires an ESOS audit in Forest Hill, contact us to discuss your requirements and start preparing for the 2027 compliance deadline.

How much does an ESOS Audit Cost in Forest Hill?

An ESOS audit in Forest Hill typically costs between £2,000 and £10,000+, depending on the size and complexity of the organisation.

The cost can be affected by:

• Number of sites
• Total energy consumption
• Buildings included within the assessment
• Transport energy use
• Industrial processes
• Availability of energy data
• Number of site surveys required
• Corporate group structure
• Existing energy audits
• ISO 50001 certification

A business operating from a small number of straightforward sites will generally cost less to assess than a large organisation with multiple locations, vehicles and energy-intensive processes.

Contact us with details of your organisation and we can discuss your ESOS Phase 4 requirements and likely costs.

Who Needs to Comply with ESOS Phase 4?

Large UK undertakings and corporate groups containing a large UK undertaking may need to comply with ESOS Phase 4 if they meet the qualification criteria on 31 December 2026.

An undertaking is considered large for ESOS purposes if it meets either of the following conditions:

• It employs 250 or more people
• It has an annual turnover exceeding £44 million and an annual balance sheet total exceeding £38 million

ESOS can also apply across a corporate group where at least one UK undertaking meets the qualification criteria.

If you are unsure whether your organisation qualifies, we can review your company size and group structure to help establish whether ESOS Phase 4 applies.

When is the ESOS Phase 4 Deadline?

The ESOS Phase 4 compliance deadline is 5 December 2027.

The qualification date is 31 December 2026, meaning organisations should establish whether they qualify and then allow sufficient time to complete the required assessment before the compliance deadline.

Organisations in Forest Hill with multiple sites, substantial transport energy use or complex industrial operations should consider starting the process well before December 2027.

If you expect your organisation to qualify, contact us to start planning your Phase 4 assessment.

What does an ESOS Phase 4 Assessment Include?

An ESOS Phase 4 assessment reviews your organisation’s energy consumption and determines what needs to be assessed to meet the scheme requirements.

Depending on your organisation, our ESOS services in Forest Hill can include:

• ESOS qualification assessment
• Corporate group review
• Total energy consumption calculation
• Identification of significant energy consumption
• Energy intensity ratio calculations
• Building energy audits
• Transport energy audits
• Industrial process energy audits
• Site surveys
• Energy-saving opportunity identification
• Energy-saving calculations
• ESOS report preparation
• Evidence pack preparation
• Lead assessor review where required
• Support with director sign-off
• Compliance notification support

The exact work required will depend on your organisation, its energy consumption and the compliance route being used.

What Happens During an ESOS Energy Audit?

An ESOS energy audit in Forest Hill examines how your organisation uses energy and identifies practical opportunities to reduce consumption.

The process can include:

1. Energy data collection: Relevant electricity, gas, fuel and other energy consumption data is gathered.
2. Total energy calculation: The organisation’s total energy consumption is calculated.
3. Significant energy consumption: The assets and activities accounting for significant energy use are identified.
4. Site surveys: Relevant buildings, processes and operational areas may be assessed.
5. Energy analysis: Consumption patterns and existing energy efficiency measures are reviewed.
6. Energy-saving opportunities: Potential measures for reducing energy use are identified.
7. Savings calculations: Potential reductions in consumption and energy costs are assessed.
8. ESOS reporting: The information required for the ESOS compliance process is prepared.

We can manage the assessment process from the initial qualification review through to the information required for your Phase 4 compliance notification.

What is Significant Energy Consumption for ESOS Phase 4?

For ESOS Phase 4, significant energy consumption must account for at least 95% of your organisation’s total energy consumption.

Energy consumption can come from:

• Commercial buildings
• Industrial buildings
• Manufacturing processes
• Machinery and equipment
• Company transport
• Fleet vehicles
• Heating
• Cooling
• Lighting
• Other energy-consuming activities

Once total energy consumption has been calculated, the areas accounting for significant energy consumption can be identified and the appropriate compliance route determined.

We can calculate your total and significant energy consumption as part of the ESOS assessment in Greater London.

What has Changed for ESOS Phase 4?

ESOS Phase 4 introduces additional requirements compared with previous compliance periods, including greater reporting around energy-saving measures and the progress organisations have made.

Changes for Phase 4 include:

• ESOS reports must include an action plan review.
• Participants must report energy savings achieved during the compliance period.
• Energy-saving measures that have been implemented must be identified.
• Proposed measures that were not implemented must be identified, with reasons given.
• A third annual progress update has been introduced.
• Display Energy Certificates are no longer an alternative ESOS compliance route.
• Green Deal Assessments are no longer an alternative ESOS compliance route.
• Requirements have changed for organisations using eligible ISO 50001 certification.

These changes mean organisations should review their previous ESOS documentation and energy-saving activity when preparing for Phase 4.

If you need help understanding how the Phase 4 changes affect your organisation, contact us to discuss your compliance requirements.

Can ISO 50001 be Used for ESOS Phase 4 Compliance?

Eligible ISO 50001 certification can be used as a deemed compliance route for ESOS Phase 4.

For Phase 4, the ISO 50001 certificate must have been issued on or after 6 December 2023 and remain valid on the compliance date of 5 December 2027.

Where eligible ISO 50001 certification provides the required coverage, the ESOS requirements are reduced and a lead assessor and ESOS report may not be required.

However, other requirements can remain, including energy calculations, director confirmation, notification of compliance through MESOS and maintaining an evidence pack.

If your organisation already has ISO 50001 certification, we can review the coverage and determine what additional work, if any, is required for ESOS Phase 4 in SE23 2.

What Happens if you Fail to Comply with ESOS?

Organisations in Greater London that fail to meet their ESOS obligations can face enforcement action and financial penalties.

The penalty depends on the type of breach. Failure to undertake a required energy audit, for example, can result in a fixed penalty of up to £50,000, together with an additional daily penalty where the breach continues following a compliance notice.

Different penalties can apply for failures such as not submitting the required compliance notification, failing to maintain records or providing false or misleading information.

If your organisation qualifies for ESOS Phase 4, it is important to establish the work required and allow enough time to complete the assessment before the 5 December 2027 deadline.

Contact Us

If your organisation needs an ESOS audit in Greater London, contact us to discuss your requirements.

We can help establish whether your organisation qualifies, calculate your energy consumption, complete the required energy audits and support you through the Phase 4 compliance process.

The Phase 4 qualification date is 31 December 2026 and the compliance deadline is 5 December 2027.

Contact us now to start preparing your organisation for ESOS Phase 4.

Frequently Asked Questions

What are the ESOS Phase 4 Progress Update Deadlines?

The Phase 4 progress update deadlines are:

• 5 December 2029 – First progress update
• 5 December 2030 – Second progress update
• 5 December 2031 – Third progress update

The third annual progress update is a new requirement introduced for Phase 4.

Do Corporate Groups Need to Comply with ESOS?

A corporate group can fall within ESOS where at least one UK undertaking in the group meets the qualification criteria.

This means individual companies that would not qualify on their own can still be included because another undertaking within the group qualifies.

Do SMEs Need to Comply with ESOS Phase 4?

SMEs will not normally qualify for ESOS in their own right if they do not meet the large undertaking criteria.

However, an SME may still be included where it forms part of a corporate group containing a qualifying large undertaking.

Do Public Bodies Need to Comply with ESOS?

Public bodies meeting the relevant ESOS definition are generally excluded from the scheme.

However, organisations should check their individual circumstances rather than assuming they are exempt based solely on their sector or activities.

Do Display Energy Certificates Count Towards ESOS Phase 4?

No. Display Energy Certificates are no longer an alternative compliance route for ESOS Phase 4.

Green Deal Assessments have also been removed as an alternative compliance route for Phase 4.

How Long does an ESOS Phase 4 Assessment Take?

An ESOS assessment can take several weeks or longer, depending on the number of sites, availability of energy data, corporate structure and complexity of the organisation.

Larger organisations should start preparing early enough to allow for data collection, site assessments, energy audits and the required compliance work.

What Happens After an ESOS Audit?

Once the required assessment work has been completed, the ESOS compliance process can include preparing the ESOS report, maintaining an evidence pack, obtaining the required director sign-off and submitting the notification of compliance through MESOS.

Phase 4 participants will also need to consider the subsequent action plan and progress update requirements.

Do I Need an ESOS Lead Assessor?

A lead assessor is required where the organisation is using ESOS energy audits, or a combination of energy audits and ISO 50001, to meet the relevant assessment requirements, subject to the ESOS rules.

A lead assessor may not be required where eligible ISO 50001 certification provides the necessary coverage.

Does ESOS Cover Transport Energy?

Yes. Transport energy can form part of an organisation’s total energy consumption where it falls within the ESOS rules.

This can include energy consumed by company transport and fleet operations that falls within the scope of the scheme.

What is MESOS?

MESOS is the online system used for ESOS administration and submission of compliance information.

Qualifying organisations use the system to submit the information required for their ESOS notification of compliance.

Should we Start Preparing for ESOS Phase 4 Now?

Yes. Organisations that expect to qualify on 31 December 2026 can start preparing for ESOS Phase 4 before the qualification date.

Reviewing your corporate structure, gathering energy data, locating previous ESOS reports and assessing existing energy audits can make the compliance process more straightforward ahead of the 5 December 2027 deadline.

Find More Info

Make sure you contact us today for a number of great ESOS audit services in London.

Here are some towns we cover near Forest Hill SE23 2

Sydenham, Catford, Lewisham, Beckenham, Peckham

For more information on ESOS Audit in Forest Hill SE23 2, fill in the contact form below to receive a free quote today.