Commercial Energy Audits That Pay For Themselves
ESOS Phase 4 compliance, SECR reporting support and site-level audits built from your half-hourly meter data — delivering a costed savings register, not a shelf document.
Three regimes, one evidence base
Most UK energy compliance pulls from the same underlying data — metering, consumption, building services. We structure the work once and feed every obligation from it.
ESOS Phase 4
Mandatory four-yearly energy assessments for large undertakings. Qualification measured at 31 December 2026; compliance due by 5 December 2027 — now with action-plan targets carried over from Phase 3.
ESOS guide →SECR reporting
Annual energy and carbon disclosure in the directors' report for large companies and LLPs — energy use, Scope 1 and 2 emissions, intensity ratio and efficiency narrative, every financial year.
SECR guide →TM44 inspections
Statutory five-yearly inspections for air-conditioning systems over 12 kW — the compliance item estates teams most often discover late, usually during a transaction.
TM44 guide →Compliance is the floor. The savings are the point.
Treat an energy audit as a box-ticking exercise and it costs money. Treat it as an investigation and it makes money. The pattern across UK commercial estates is remarkably consistent: 10–25% of energy spend is recoverable, and the first slice rarely needs capital.
The recoverable spend hides in predictable places. Heating and cooling running outside occupancy hours — visible immediately in half-hourly data. Compressed air leaks in industrial sites, often 20–30% of compressor output. Lighting that pre-dates LED in back-of-house areas nobody audits. Plant fighting its own controls because setpoints drifted years ago. None of this is exotic; all of it needs someone to look, measure and cost the fix.
That is what the audit deliverable is for: a savings register your finance director can act on, each measure carrying its capital cost, annual saving, payback and carbon impact. Where measures point to on-site generation, the audit-to-solar pathway explains how audit data de-risks a PV investment decision.
What a proper audit looks like
The method matters more than the badge. Our audits follow the same sequence whether the driver is ESOS, a board net-zero commitment, or a painful energy contract renewal:
- 1Data before boots. Twelve months of half-hourly electricity data, gas consumption and bills, analysed before anyone visits. Out-of-hours baseload alone typically explains 5–15% of spend.
- 2Site survey. Plant rooms, distribution, controls, lighting, building fabric, compressed air, refrigeration — surveyed against how the data says the building actually behaves.
- 3Costed register. Every measure priced with real capital costs and verified savings calculations — not percentages lifted from a handbook.
- 4Compliance packaging. The same evidence assembled into whatever the regime needs: ESOS evidence pack and lead assessor sign-off, SECR disclosure figures, board papers.
The detailed walkthrough is on the audit process page; pricing logic on the cost page.
Who commissions us
Compliance-driven organisations
Groups crossing the ESOS thresholds, large companies inside SECR, estates discovering TM44 obligations mid-transaction. The deliverable is a defensible evidence pack, signed off by a registered lead assessor where the regime requires one.
Cost-driven operators
Manufacturers, logistics operators, hospitality groups — organisations whose energy line moved from nuisance to board item. The audit pays back through the register, and compliance comes along free if thresholds are crossed later.
Net-zero committed boards
Organisations with public commitments that now need numbers behind them. Audit data baselines Scope 1 and 2 emissions properly, sequences the decarbonisation plan, and feeds annual disclosures without re-doing the work each year.
Where commercial energy audits find money, sector by sector
Twenty years of UK audit findings are remarkably repetitive, which is good news: the waste is predictable, so the recovery is too. The patterns we see most often:
- Manufacturing. Compressed air is the perennial offender — leaks and inappropriate uses commonly absorb 20–30% of compressor output, and compressors run at night because nobody is sure what would happen if they stopped. Motor systems without variable speed drives and process heat escaping unrecovered follow close behind.
- Offices. The classic finding is simultaneous heating and cooling: perimeter heating fighting the air conditioning because two control systems were never introduced to each other. Add weekend HVAC schedules nobody reviewed since fit-out and lighting in cores and car parks running 168 hours a week.
- Warehousing and logistics. High-bay lighting pre-LED is still common and pays back in two to three years; destratification fans cut heating bills in tall spaces; dock door seals and fast-acting doors stop paying to heat the car park.
- Hospitality and leisure. Kitchens, pools and laundries — heat recovery opportunities everywhere, plus catering equipment switched on at 7am for a 12-noon service. Half-hourly data makes the morning plateau impossible to argue with.
- Cold storage and food. Refrigeration condition and control is the whole game: suction pressure setpoints, door discipline, defrost scheduling and heat recovery from compressor racks routinely return 10–20% of site spend.
None of these findings requires heroics. They require half-hourly data read by someone who knows what normal looks like, a survey that goes where the kWh actually go, and a register that prices each fix — which is precisely the process we run.
A note on funding the fixes: domestic property enjoys 0% VAT on energy-saving materials until March 2027, but commercial measures carry standard VAT — so the business case rests on payback, capital allowances and, in several regions, combined-authority grant programmes for SMEs. The savings register flags which measures qualify for what, because a measure that looks marginal at list price often clears the hurdle once the right funding route is attached.
Commercial energy audit questions
What does a commercial energy audit actually deliver?
A costed savings register: a list of specific measures for your buildings, each with capital cost, annual saving, payback and carbon impact, built from your half-hourly meter data and a physical site survey. Done properly, audits of UK commercial sites typically surface 10–25% in identifiable savings, with the first tranche usually low-cost or no-cost operational changes.
Does my company need to comply with ESOS Phase 4?
You qualify if, at the qualification date of 31 December 2026, your UK organisation employs 250 or more people, or has turnover above £44m and a balance sheet above £38m. Corporate groups qualify as a whole if any UK member qualifies. The Phase 4 compliance deadline is 5 December 2027 — and Phase 4 carries the new requirement to set targets against your Phase 3 action plan.
What is the difference between ESOS and SECR?
ESOS is a four-yearly audit obligation — you must assess your energy use and identify savings. SECR is annual disclosure — large companies report energy use, emissions and an intensity metric in the directors' report every financial year. Many organisations are caught by both; the same audit data, structured once, feeds the two regimes.
How much does a commercial energy audit cost?
Single-site audits typically run £1,500–£4,000 depending on size and complexity. Full ESOS compliance programmes for multi-site organisations range from roughly £5,000 to £25,000+. Set against a typical qualifying organisation's energy spend, audits usually pay for themselves several times over in year one — the cost page gives the full breakdown.
Is an energy audit the same as an EPC?
No. An EPC rates the building's theoretical efficiency for compliance at sale or letting; an energy audit analyses how your organisation actually uses energy and what specifically to change. The EPC is about the asset, the audit is about the operation. Buildings being let or sold need the certificate; organisations trying to cut spend need the audit.