Energy efficiency requirements for commercial buildings in the UK are changing. EPC B rating commercial regulations under proposed MEES updates mean many businesses may need to improve their building’s energy performance to remain legally lettable in the coming years.
What is an EPC B rating for commercial buildings?
An Energy Performance Certificate (EPC) measures how energy efficient a building is, scoring it from A (most efficient) to G (least efficient). A B rating indicates strong building fabric, efficient heating and electrical systems, and lower operational energy demand.
Commercial EPC timeline: what to expect by 2027 and 2030:
– Currently: Minimum EPC E required
– Expected from 2027: Minimum EPC C
– Expected by 2030: Minimum EPC B
These changes form part of the UK government’s wider Minimum Energy Efficiency Standards (MEES) framework.
Which commercial buildings are affected by EPC B ratings?
These proposed MEES changes apply to non-domestic rented buildings in England and Wales, including offices, warehouses, retail units, hospitality venues and industrial sites, unless a valid exemption is registered.
These EPC changes apply in England and Wales under UK legislation; Scotland has its own energy performance regulations, which operate under a separate framework.
Why EPC compliance matters:
For many organisations, meeting EPC B rating commercial requirements will involve a combination of targeted energy efficiency upgrades and long-term planning.
Failing to meet minimum EPC requirements or to register an appropriate exemption can result in enforcement action, fines and restrictions on future lettings.
Improving EPC ratings:
– Solar PV
– LED lighting
– Heat pumps
– Insulation and glazing
– Battery storage
Supporting businesses through EPC compliance
Many businesses are now taking a strategic approach to EPC compliance by combining energy assessments, on-site generation, and funded solutions. Early planning allows upgrades to be phased, cost-effective, and aligned with operational needs.
Non-capex options:
Power Purchase Agreements (PPAs) can allow solar installations with no upfront cost, lower energy prices and improved EPC performance.
Next steps:
1. Check your EPC
2. Identify improvements
3. Assess compliance risk
4. Explore funding options
5. Plan upgrades early
Conclusion:
Preparing early for EPC B requirements protects asset value, reduces costs and ensures compliance — especially as enforcement becomes tighter towards 2030.
FAQ's
Do all commercial buildings need an EPC B rating by 2030?
Not all buildings will be affected immediately. Requirements apply mainly to properties that are rented or leased, unless a valid exemption is registered.
Is EPC B a legal requirement yet?
No, but government policy indicates EPC B is the long-term target, with EPC C expected first from 2027
How much does it cost to improve an EPC rating?
Costs vary depending on building size, age, and use. Many businesses are now exploring funded or non-capital options to manage upgrades.
Last updated: January 2026