Domestic and commercial energy audits
What does an energy audit cost?
A domestic retrofit assessment typically costs £150–£400. A commercial energy audit runs £500–£2,500+ depending on floor area and how many meters, plant items and systems the assessor has to trace. ESOS jobs for large undertakings are priced per organisation. Tell us about your building and relevant local energy assessors will quote you their exact price.
£500–£2,500+
commercial energy audit, priced mainly by floor area and system count (typical 2026 quotes)
Three steps
- Tell us what you need audited, building type, size, why. Two minutes, no account.
- We pass your details to relevant energy assessors covering your postcode, and to no one else.
- They contact you directly with their actual price for your building. Compare, choose, or walk away.
Energy Audit Cost is a free introduction service operated by Ellul Solutions Ltd; we pass your details to relevant local energy assessors who quote you directly. We may receive a fee from providers; you pay nothing and are under no obligation. We are not an energy assessment firm and nothing here is professional advice; cost figures are typical 2026 quote ranges that vary by region, floor area and complexity.
Typical energy audit costs, 2026
Last updated
What each kind of energy assessment typically costs in the UK. These are typical quote ranges observed across the market in 2026, not fixed prices; floor area, system count and travel move the number.
Ranges reflect typical quotes for energy assessment work observed across the UK market in 2026; they vary by region, floor area and the number of meters and systems on site. ESOS work has no standard tariff because it is priced per undertaking and site count. Get exact quotes for your building via the form above.
| Assessment | Typical cost (2026 quotes) | Notes |
|---|---|---|
| EPC, domestic | £60–£120 | Standardised rating needed to sell or let; not a full audit |
| Domestic retrofit / home energy assessment | £150–£400 | Whole-house survey with costed improvement measures |
| Commercial energy audit, small premises (under 500 m2) | £500–£1,000 | Walkthrough survey, metering review, costed measures |
| Commercial energy audit, larger or multi-system premises | £1,000–£2,500+ | HVAC, lighting, controls and fabric; priced by floor area |
| ESOS assessment (large undertakings) | Priced per undertaking | Depends on site count and data quality; multi-site portfolios run into thousands, get quotes |
- A domestic retrofit or home energy assessment typically costs £150–£400 (typical 2026 quotes; varies by region and property size).
- A commercial energy audit typically costs £500–£2,500+ in 2026 quotes, priced mainly by floor area and the number of systems surveyed.
- ESOS is mandatory for large UK undertakings; the Phase 4 compliance deadline is 5 December 2027 (gov.uk ESOS guidance).
Cite this page
“Typical energy audit costs, 2026”, Energy Audit Cost, https://energyauditcost.co.uk/ (updated 2026-08-14). Ranges reflect typical quotes for energy assessment work observed across the UK market in 2026; they vary by region, floor area and the number of meters and systems on site. ESOS work has no standard tariff because it is priced per undertaking and site count. Get exact quotes for your building via the form above.
Read next
The longer answers, with sources.
ESOS explained: who qualifies, deadlines and audit costs in 2026
ESOS is mandatory for UK undertakings with 250+ staff, or over £44m turnover and a £38m balance sheet. Phase 4 deadline is 5 December 2027. What compliance costs.
EPC vs energy audit: which one you need and what each costs
An EPC is a standardised rating needed to sell or let, £60–£120 for homes. An energy audit is a tailored survey, £150–£400 domestic. Which one you actually need.
Commercial energy audit: what's included and 2026 costs
A commercial energy audit covers metering, HVAC, lighting, controls and building fabric, with a costed savings report. Typical 2026 prices run £500–£2,500+ by size.
Questions, answered directly
How much does an energy audit cost?
Typical 2026 quotes: £150–£400 for a domestic retrofit or home energy assessment, £500–£2,500+ for a commercial energy audit depending on floor area and systems. ESOS work for large undertakings is priced per organisation. Ranges vary by region, so get quotes for your actual building.
Is an energy audit a legal requirement?
Only in specific cases: ESOS energy audits for large undertakings (250+ employees, or over £44m turnover with a £38m balance sheet), an EPC when selling or letting, and Display Energy Certificates for larger public buildings. For everyone else an audit is voluntary and bought to cut bills.
Is an EPC an energy audit?
No. An EPC is a standardised A–G rating produced for sales and lettings, typically £60–£120 for a home. An energy audit is a tailored survey of how your building actually uses energy, with costed measures and paybacks, typically £150–£400 domestic and £500–£2,500+ commercial (typical 2026 quotes).
How long does an energy audit take?
A home assessment is usually a half-day visit with the report following in days. A commercial walkthrough audit is typically one site day plus data analysis; detailed investment-grade audits and multi-site ESOS work run to weeks because monitoring and data collection take the time.
Will an energy audit actually save money?
The audit itself saves nothing, it finds and prices the measures. Good commercial audits typically identify no-cost and low-cost measures first (setpoints, controls, out-of-hours baseload) before capital items. Ask any assessor to show a sample report with costed paybacks before you hire.
Is this quote service really free?
Yes, free to you, with no obligation to accept any quote. We pass your details only to relevant local energy assessors, who quote you directly; we may receive a fee from those providers, which is how the service is funded.