**UPDATE — September 2026:** Government policy has changed since this article was published. The proposed EPC C milestone for 2027 has been dropped. Following the June 2026 interim response, the Government now intends to introduce EPC B from 2031 for non-domestic privately rented buildings over 1,000 m², where cost-effective and subject to the necessary legislation. The current legal minimum to let remains EPC E, subject to exemptions. See our current Commercial EPC and MEES guidance. The article below is retained as published.
The Minimum Energy Efficiency Standards (MEES) already make it unlawful to let most commercial buildings rated F or G. Government has consulted on raising that bar to EPC C by 2027 and EPC B by 2030 — a move that would bring a significant share of the UK's let stock into scope of upgrade works.
For asset managers and landlords, the risk is twofold: stranded assets that cannot be lawfully let, and a rush on contractors and grid capacity as deadlines approach.
Step 1 — Portfolio screening
Begin with an EPC register pull across every let unit. Cross-check expiry dates, half-hourly meter data and rating bands. The buildings closest to a band boundary are usually the cheapest wins and the best place to start.
Step 2 — Cost-to-comply modelling
Build a cost-to-comply view per asset. The aim is not a perfect retrofit plan on day one, but a defensible budget envelope and prioritisation list that aligns with lease events and planned capex cycles.
Step 3 — Sequence works around lease events
Most upgrades are far cheaper between tenancies. Mapping intervention windows against your lease calendar typically removes 20–40% of disruption cost compared with reactive works.