On 18 June 2026, the government published its interim response on Minimum Energy Efficiency Standards (MEES) in the non-domestic private rented sector. After five years of consultation and shifting deadlines, there is finally a clear direction. The headline is simple: large commercial buildings will need an Energy Performance Certificate (EPC) rating of B to be legally let from 2031. This regulatory shift makes proactive energy compliance more critical than ever for landlords and property managers.
What Has Actually Changed?
The new regulations refine the scope and timeline of the previous proposals. Here is exactly what has been confirmed for the commercial property sector:
- Target rating: The ultimate target remains EPC B.
- Deadline: The compliance deadline has been moved to 2031, offering one additional year compared to the originally proposed 2030 cut-off.
- Scope: The new rules apply only to buildings over 1,000 square metres where improvements are deemed cost-effective.
- Interim step: The previously proposed interim milestone of achieving EPC C by 2027 has been dropped entirely.
- Smaller buildings: Buildings under 1,000 square metres remain at the current EPC E minimum, with no new uplift deadline introduced at this stage.
The “where cost-effective” test is crucial. Improvements expected to be uneconomic may qualify for an exemption, though the precise detail will be confirmed in upcoming secondary legislation. We strongly advise against relying on an untested exemption when planning your energy management strategy. Please note that MEES does not apply in Scotland, which operates a entirely separate regulatory regime.
Why 2031 Is Not As Far Away As It Sounds
The 2031 deadline is the date your property needs to be fully compliant, not the date to start preparing. Working backwards from 2031, the practical window is significantly shorter once you account for initial assessment, system design, equipment procurement, carrying out the physical works, and generating a fresh EPC.
Furthermore, early movers will avoid the inevitable 2029 to 2031 squeeze on assessors, installers, and equipment as the wider market rushes to meet the regulatory cut-off.
The Double Cost of Waiting
Every year a building remains inefficient, it pays more than it needs to for utilities and moves no closer to compliance. Energy avoided is money kept in your business today; the EPC improvement is simply the regulatory requirement you were going to have to meet anyway. Often, the exact same works serve both purposes.
For example, a site consuming high volumes of electricity on an unmanaged grid rate carries a substantial avoidable energy cost over the rest of the decade. Delaying action means absorbing these inflated costs for years before a deadline forces your hand. Implementing targeted energy reduction measures now allows you to bank the financial savings immediately.
Where Solar and On-Site Generation Fit
On-site solar generation does two jobs at once: it contributes to an improved EPC rating and starts cutting your energy costs from the day it is commissioned. While solar alone is rarely enough to take a large, poorly rated building all the way to EPC B, it is a highly effective measure within a broader, costed retrofitting plan.
When combined with intelligent energy monitoring, you can ensure your building operates efficiently and any generated power is maximally utilised. The commercial point stands either way: the financial saving is available right now, well before the 2031 legislation makes the higher rating compulsory.
What You Should Do Now
Government modelling suggests this policy could save tenants in these larger buildings in the region of £360 million a year in energy costs once the sector complies. That saving is not magically switched on in 2031; it accrues to the buildings that improve early.
Here is the three-step approach Omnium recommends for commercial portfolios:
- 1. Establish your baseline: Confirm current EPC ratings and floor areas across your entire portfolio. Identify which assets fall above the 1,000 square metre threshold and which sit furthest below the EPC B target.
- 2. Model the route to B: Develop a costed plan per priority building. This should outline the required measures, the realistic EPC uplift, the projected energy savings, and the optimal window to execute the works (ideally aligned with lease events or plant end-of-life).
- 3. Capture the saving early: Sequence the measures that pay back immediately. This ensures the operational savings fund the longer-term compliance work, rather than allowing a looming deadline to dictate a rushed, expensive retrofit.
Whether you need to overhaul your properties to meet the new MEES regulations, optimise your energy procurement to fund future upgrades, or streamline your commercial water services to reduce overall estate costs, Omnium provides the evidence-led roadmap you need. We assess honestly, show our remuneration clearly on the rate, and frame the facts so you can make confident real estate decisions.
