The non-domestic MEES regime differs from the domestic residential MEES in two important respects. First, the April 2023 requirement applied to ALL commercial lettings — including leases already in place — rather than only new grants of lease (as was the case for the first phase of domestic MEES). This means commercial landlords cannot simply wait for an existing lease to expire to address a sub-standard EPC rating — they are in breach now if they continue to accept rent on a sub-E property without a valid registered exemption. Second, the civil penalty for commercial MEES breach is substantially higher: up to £150,000 per property, compared to a maximum of £5,000 (for lettings of less than 3 months) or £30,000 for domestic residential MEES breaches.
The proposed future trajectory — EPC C by 2027 for new commercial leases, EPC B by 2030 for all commercial lettings — is not yet enacted in legislation as of June 2026, but institutional lenders and commercial property investors are incorporating these proposed targets into their underwriting standards and investment mandates. A commercial property that is currently EPC D or E is already viewed as an asset requiring significant capex to maintain its value and lettability over the next 5-10 years. Landlords who act early — improving energy performance now — avoid the double cost of emergency compliance under tenant pressure and the premium pricing that contractors will charge when the market is simultaneously trying to hit the 2030 deadline.
Commercial MEES EPC E requirement, proposed future trajectory, NDEA assessors, improvement measures, exemptions, civil penalties and Display Energy Certificates
The complete framework for commercial EPC and non-domestic MEES compliance:
- Current EPC E requirement, stranded assets, what constitutes a commercial EPC and the NDEA assessor levels: CURRENT NON-DOMESTIC MEES REQUIREMENT: Energy Efficiency (Private Rented Property) (England and Wales) Regulations 2015 (SI 2015/962) — the non-domestic provisions (Part 3 of the Regulations). From 1 April 2023: a landlord must not continue to let any commercial property (other than those with a valid registered exemption) where the property has an EPC rating below E. This applies to all commercial lettings including leases already in place — not just new leases granted after April 2023. STRANDED ASSET RISK: a commercial property with EPC F or G that cannot achieve EPC E with cost-effective improvements and cannot register a valid exemption: (a) cannot legally be let (breach of the Regulations); (b) is increasingly difficult to mortgage — many commercial mortgage lenders now require EPC E as a minimum lending condition; institutional lenders (insurance companies; pension funds) that provide senior debt on commercial properties often require EPC C or above; (c) is increasingly difficult to sell at full value — buyers discount sub-E properties for the cost of compliance works; REITs and institutional property investors routinely exclude sub-E properties from their mandates. WHAT IS A COMMERCIAL EPC: a Non-Domestic Energy Performance Certificate (NDEPC) is produced by a Non-Domestic Energy Assessor (NDEA) using approved government software. Unlike a domestic EPC (produced by a domestic energy assessor using the SAP or RdSAP methodology), a commercial EPC uses: (a) iSBEM (Simplified Building Energy Model) for simpler buildings — most standard offices; retail units; industrial units; simple educational buildings; iSBEM assesses the building fabric (U-values; air permeability; thermal bridging) and fixed building services (heating; cooling; ventilation; lighting; hot water) against a notional reference building; (b) DSM (Dynamic Simulation Modelling) for complex buildings — where HVAC or internal gains are too complex for iSBEM; hotels; hospitals; large multi-story commercial buildings; data centres. EPC RATING SCALE: commercial properties use the same A+ to G scale as domestic EPCs. Current standard: EPC E = minimum threshold. A+ is the most energy-efficient; G is the least. Most commercial properties built before 1990 without major refurbishment will typically be in the D-F range; modern well-insulated offices and industrial units typically achieve A-C. EPC VALIDITY: commercial EPCs are valid for 10 years from the date of issue. A new EPC is required on: a new lease being granted (or on re-letting after the existing lease ends); sale of the property; when the existing EPC expires. NDEA LEVELS: Level 3: competent person for simpler building types (non-complex HVAC; buildings heated by gas boiler with simple ventilation); Level 4: complex buildings with complex HVAC systems (offices with full air conditioning; hospitals; hotels); Level 5: very complex buildings (large multi-story; data centres; high-rise office towers). NDEA must be listed on the Elmhurst Energy / Stroma Certification / Quidos register.
- Proposed EPC B by 2030 trajectory, improvement measures, MEES exemptions, civil penalty and Display Energy Certificates: PROPOSED FUTURE TRAJECTORY (NOT YET ENACTED — GOVERNMENT CONSULTATION): the government has proposed (subject to legislation) the following commercial MEES trajectory: (a) EPC C — new commercial leases from 1 April 2027; (b) EPC C — all existing commercial lettings from 1 April 2028; (c) EPC B — new commercial leases from 1 April 2030; (d) EPC B — all existing commercial lettings from 1 April 2032. These proposed dates are NOT yet law as of June 2026 and remain subject to Parliamentary approval. However, institutional lenders and commercial property investors are incorporating these targets NOW: CBRE; Cushman and Wakefield; JLL; and other major commercial property agents and advisers are consistently advising their clients to target EPC B or above on any major refurbishment, regardless of the current legislative minimum. A commercial property that achieves EPC E (the current minimum) but fails EPC C or B would require further works in 2027-2028 and 2030-2032 — 'double spending' on energy improvements — whereas a single major refurbishment now that achieves EPC B future-proofs the asset for the foreseeable regulatory environment. COMMON IMPROVEMENT MEASURES FOR COMMERCIAL PROPERTIES: (a) LED LIGHTING: replacing T8 fluorescent or older technology lighting with LED typically reduces lighting electricity consumption by 50-80% — one of the most cost-effective measures with a typical payback of 2-5 years; approximate cost £5-25/sqm depending on complexity; (b) HVAC SYSTEM UPGRADE: replacing old gas-fired air handling units or DX (direct expansion) cooling systems with modern VRF (Variable Refrigerant Flow) or heat pump systems; replacing gas boilers with commercial air source heat pumps (ASHP); (c) BUILDING MANAGEMENT SYSTEM (BMS): installing or upgrading a BMS to provide automated control of HVAC; lighting; and hot water systems — a BMS can reduce overall energy consumption by 10-30% at relatively low cost; (d) INSULATION: solid wall insulation; roof insulation (low-cost for industrial units with large flat or pitched roof areas); (e) SOLAR PV: photovoltaic panels on large south-facing roof areas (industrial and warehouse properties are ideal); can also include battery storage for peak-shaving; (f) AIRTIGHTNESS MEASURES: draught-proofing; automatic door closers; revolving door entries for offices. MEES EXEMPTIONS FOR COMMERCIAL PROPERTY: registered on the PRS Exemptions Register (PRS-EX) at www.gov.uk/energy-performance-certificate-commercial-property; valid for 5 years; grounds: (a) ALL RELEVANT IMPROVEMENTS MADE: all improvements recommended in the EPC's Recommendations Report have been installed and the property still does not achieve EPC E — valid exemption; evidence required: EPC issued after the works, confirming sub-E rating and that all recommended improvements have been installed; (b) THIRD-PARTY CONSENT REFUSED: improvements require the consent of a superior landlord; head leaseholder; or tenant (e.g., access to the demised area to carry out works) and consent has been formally refused; evidence: written refusal of consent; (c) RICS DEVALUATION EXEMPTION: a RICS-accredited chartered surveyor certifies that carrying out one or more of the EPC-recommended improvements would reduce the market value of the property by more than 5%; note: this exemption is more commonly available for commercial properties than for residential (where the 5% devaluation threshold is rarely met); evidence: written RICS valuation report; (d) NEW LANDLORD EXEMPTION: where a landlord recently acquired a commercial property that was already below EPC E in the preceding 18 months, a 6-month new landlord exemption is available while the landlord takes steps to achieve compliance or establish another exemption. CIVIL PENALTIES: enforcement is by the local authority (London boroughs; district councils; unitary authorities outside London; county councils in two-tier areas); penalties for commercial MEES breach: up to £150,000 per property (the maximum for a commercial MEES breach — compared to the domestic residential MEES maximum of £5,000 for lettings of less than 3 months or £30,000 for longer lettings); the civil penalty does NOT void the commercial lease (unlike some domestic enforcement outcomes); the breach is publicised in the PRS Exemptions Register. DISPLAY ENERGY CERTIFICATES (DECs): DECs are required for public authority buildings with a total useful floor area over 250 sqm under the Energy Performance of Buildings (England and Wales) Regulations 2012 (reg.16). DECs are fundamentally DIFFERENT from EPCs: (a) EPC: based on modelled (theoretical) energy performance of the building — ASSET RATING; (b) DEC: based on ACTUAL metered energy consumption (gas; electricity; oil; district heat — obtained from utility bills and metering data) — OPERATIONAL RATING; DECs must be displayed publicly in the building (reception; main entrance); annual DECs (and advisory report) for buildings over 1,000 sqm; 10-year DECs for buildings 250-1,000 sqm; local authority buildings; higher and further education institutions; central government offices — all commonly subject to the DEC requirement; failure to display a DEC: civil penalty of up to £1,000 (per offence)
Frequently asked questions
What is the current commercial MEES requirement for commercial landlords?+
From 1 April 2023, commercial landlords in England and Wales cannot continue to let commercial property with an EPC rating below E, unless a valid exemption is registered on the PRS Exemptions Register. This applies to ALL existing commercial lettings — not just new leases granted after April 2023. A commercial property below EPC F or G is a stranded asset: unlettable, increasingly unmortgageable, and value-impaired. Civil penalty for breach: up to £150,000 per property.
What is the proposed EPC B target for commercial property by 2030?+
The government has proposed (subject to legislation — NOT yet enacted as of June 2026): EPC C for new commercial leases from April 2027; EPC C for all existing commercial lettings from April 2028; EPC B for new commercial leases from April 2030; EPC B for all existing commercial lettings from April 2032. These are proposed dates and require Parliamentary approval. However, institutional lenders and commercial property investors are already incorporating these targets into underwriting standards and investment mandates.
What exemptions are available from commercial MEES?+
Commercial MEES exemptions (registered on PRS Exemptions Register; valid 5 years): (a) all EPC-recommended improvements installed and property still below EPC E; (b) third-party consent (tenant; superior landlord) required for improvements and formally refused; (c) RICS-accredited surveyor certifies improvements would reduce market value by more than 5%; (d) new landlord exemption — 6-month window for recently-acquired sub-standard property. Each exemption requires supporting evidence; the PRS Exemptions Register is publicly searchable.
What is a Display Energy Certificate (DEC) and is it the same as a commercial EPC?+
No — a DEC is different from an EPC. An EPC shows MODELLED (theoretical) energy performance based on the building's fabric and fixed services (asset rating). A DEC shows ACTUAL energy performance based on metered energy consumption data (gas; electricity; heat — from utility bills). DECs are required for public authority buildings over 250 sqm, must be displayed publicly in the building, and renewed annually (for buildings over 1,000 sqm) or every 10 years (for buildings 250-1,000 sqm). Failure to display a DEC carries a civil penalty of up to £1,000.
- Residential MEES — EPC E minimum for domestic private rented sector →
- EPC C upgrade — residential EPC C target 2030 and improvement costs →
- EPC exemptions — domestic MEES exemption grounds and register →
- Commercial mortgage — LTV, ICR and lender EPC requirements →
- Building regulations — Part L energy efficiency compliance →
- Net zero rental property — decarbonisation pathway for landlords →