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Welcome to the UKAEE – ESOS Lead Assessor certification guide, your support for applications, renewals and legislative queries. We are dedicated to supporting professional growth and community impact through our chapter.
Our Objectives:
To provide clear guidance to ESOS Lead Assessors past, existing or new applications.
To support additional queries or issues faced with new applications or renewals.
Support improvements to the application process and platforms.
Support ESOS queries to the Environmental Agency
What is an Energy Savings Opportunity Scheme (ESOS) Lead Assessor?
What is an Energy Savings Opportunity Scheme (ESOS) Lead Assessor?
An AEE certified ESOS Lead Assessor (LA) has demonstrated that they have the capability to carry out and oversee or review energy audits and overall ESOS assessment aligned with the requirements of the UK Environment Agency ESOS regulations.
ESOS certified Lead Assessors are the only individuals approved by the UK Environmental Agency to sign off ESOS audits for organisations required to comply with ESOS.
Energy Savings Opportunity Scheme (ESOS) information
Lead Assessor competencies and process:
PAS 51215:2014 (withdrawn but current) - Energy efficiency assessment. Competence of a lead energy assessor. Specification
The below PAS documents specify the assessment and reporting process that can be used on a voluntary basis for ESOS compliance in Phase 4.
PAS 51215-1:2025 - Energy and decarbonisation assessment - Process Specification
PAS 51215-2:2025 - Energy and decarbonisation assessment - Competencies of lead assessors and assessment teams.
UKAEE ESOS Pages
AEE Certification
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Contact us at esos@ukaee.org
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