Energy performance certificates (EPC).
Energy Performance Certificates (EPCs) are mandatory assessments rating the energy efficiency of commercial buildings from A (most efficient) to G (least). EPCs are legally required when commercial properties are built, sold or let, and are valid for 10 years.
Future-proof your property portfolio.
Meet evolving EPC regulations
Improve building energy performance
Reduce compliance risks
Plan upgrades with confidence
EPC, MEES and ESOS, all in one place.
ista provides EPC assessments, MEES modelling and ESOS audits, all under one integrated service.
Our MEES reporting models the impact of on‑site improvements, helping you clearly understand what actions are required to achieve your target EPC rating – now and in the future.
Contact our team to discuss your EPC, MEES and ESOS requirements in one coordinated approach.
Understanding EPC requirements for UK commercial properties (2025–2030).
Among other things, EPC data also plays an important role in wider compliance obligations, including Minimum Energy Efficiency Standards (MEES) and Energy Savings Opportunity Scheme (ESOS) assessments, making them a key foundation of a building’s overall energy strategy.
Current EPC & MEES requirements.
Under current MEES regulations:
- All commercial properties in England and Wales must meet a minimum EPC rating of E to be legally let
- A valid EPC must be in place for any property that is sold or leased
- Properties with ratings F or G cannot be legally let unless a valid exemption is registered
Failure to comply with EPC and MEES requirements can result in financial penalties and enforcement action, as well as restrictions on letting affected properties.
What’s changing from 2025–2030?
The UK Government has set out a clear trajectory to tighten EPC standards over the coming years:
- April 2025: All let commercial properties must have a valid EPC, including those with existing leases
- 2028 (proposed): Minimum EPC rating expected to rise to C
- 2030 (proposed): Minimum EPC rating expected to rise to B
These changes mean many properties that are currently compliant will require targeted upgrades to remain lettable.
Why EPC standards are tightening.
EPC and MEES reforms support the UK’s net‑zero 2050 targets. Commercial buildings are responsible for over 20% of UK carbon emissions, and improving building efficiency reduces energy consumption, operating costs and emissions.
Raising EPC standards also brings EPC, MEES and ESOS requirements closer together, helping organisations take a more strategic and data‑led approach to building energy performance.
EPC methodology updates.
Recent EPC methodology changes, including SBEM 6.1, place greater emphasis on:
- Actual energy performance
- Updated carbon factors
- Detailed assessment of building services and controls
Future updates are expected to increasingly favour low‑carbon heating technologies, improved insulation, advanced lighting and smart controls, making early planning essential.
What property owners should do now.
- Check whether your EPC is valid and up to date.
- Identify buildings rated D or below and assess upgrade options.
- Plan improvement works to meet EPC C (2028) and EPC B (2030) targets.
- Use energy modelling to understand the impact of improvement measures before investing.
EPC reviews and improvement planning are often completed as part of ESOS audits, giving organisations clearer insight into compliance gaps and cost‑effective upgrade pathways.
Let us help you find the perfect solution.
Contact our team to discuss your EPC, MEES and ESOS requirements in one coordinated approach.
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Maximise energy tax savings and achieve your carbon reduction goals with expert CCA support that simplifies compliance and aligns with your wider reporting obligations.
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Plan with confidence using data-driven insights and integrated compliance services that help keep your properties lettable and efficient.
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Stay compliant with TM44 regulations through expert inspections that improve system efficiency, reduce energy costs and support your wider compliance strategy.