Embedded Files
ESOS-compliant building audits and the BMS expertise to deliver what the report recommends
ESOS is a mandatory energy assessment scheme for large UK organisations (250+ employees, or £44m+ turnover and £38m+ balance sheet). Qualifying organisations must audit their energy use every four years, identify cost-effective savings, and commit to an Action Plan with annual progress updates that are publicly disclosed.
Phase 3 action plan second update due: 5 December 2026
Phase 4 qualification date: 31 December 2026.
Phase 4 compliance deadline: 5 December 2027.
Energy Approach provides ESOS building audits conducted by a registered Lead Assessor, with specialist BMS diagnostic capability that most generalist assessors cannot offer.
What Is Changing in ESOS?
What Is Changing in ESOS?
Current phase: Phase 4 (6 December 2023 – 5 December 2027)
Qualification date: 31 December 2026
Compliance deadline: 5 December 2027
New requirements from Phase 3 onwards:
All participants must produce an ESOS report, Action Plan, and two annual progress updates
Progress against Action Plan commitments must be included in the Phase 4 assessment
Where commitments have not been met, organisations must explain why and publicly
Display Energy Certificates and Green Deal Assessments removed as compliance routes
The direction of travel is clear: ESOS is shifting from a four-yearly reporting exercise to an ongoing accountability framework. Control is one of six statutory energy saving categories defined in the ESOS Regulations, and every audit recommendation must be assigned to the category it most closely relates to.
The Problem Most Organisations Have Right Now
The Problem Most Organisations Have Right Now
Phase 3 action plans were submitted by March 2025. The first progress update was due December 2025. The second is due December 2026.
1 in 6 measures in the published ESOS Phase 3 action plan dataset* are BMS or controls related. Nearly half of all action plans contain at least one. They are also among the least likely to be implemented, because the firm that wrote the audit is rarely equipped to deliver the work.
If your action plan lists BMS optimisation, setpoint corrections, scheduling improvements, or controls related measures and you haven't acted, you are already in the progress update window with a publicly visible gap to close.
Controls measures are the fastest to implement within the update window, and the easiest to evidence with M&V, because they need no capital procurement.
*Source: ESOS Phase 3 action plan dataset, GOV.UK, February 2026
How Energy Approach Helps
How Energy Approach Helps
Energy Approach is independently positioned to support both sides: the assessment review and the technical delivery.
ESOS support includes:
ESOS assessment review by a registered Lead Assessor: energy audits, evidence pack, total and significant energy consumption calculations, and confirmation that audits meet ESOS minimum requirements
ESOS Phase 4 building audits undertaken where needed, or review of audit work already carried out by others
BMS diagnostic audits aligned to ESOS audit requirements and action plan commitments
Controls implementation: schedules, setpoints, deadbands, sensor calibration, AHU sequencing
IPMVP aligned measurement and verification to evidence savings for progress updates
Action plan and progress update support ahead of 5 December 2026.
We work vendor-agnostically across Trend, Siemens Desigo, Honeywell (Tridium Niagara), Schneider, Johnson Controls and Satchwell.
Working alongside Lead Assessors and consultancies
Working alongside Lead Assessors and consultancies
If BMS comes up in your assessments, Energy Approach works as a specialist alongside you. Support includes site audit input on controls measures, categorisation of opportunities under the Control energy saving category, diagnostic work, IPMVP aligned M&V for progress updates, and sourcing the right BMS contractor for delivery. White label delivery available.
Why This Is Different
Why This Is Different
Most ESOS Lead Assessors are energy generalists. When a building audit identifies BMS improvements, the recommendation goes into the report and stops there. The client is left to commission a separate BMS contractor, who has no ESOS context, no M&V capability, and no interest in evidencing savings.
Energy Approach combines registered Lead Assessor status with 10 years of hands-on BMS diagnostic and technical project management experience across NHS PFI, corporate real estate, and multi-site portfolios. The audit and the implementation are handled by the same specialist.
Common action plan entries we deliver: BMS optimisation, cooling and heating network demand reviews, lighting controls, setpoint reviews, AHU control improvements, boiler optimisation, scheduling changes, CHP and district heating network optimisation.
Page updated
Google Sites
Report abuse