Whether you're a landlord with a portfolio of commercial units, a business owner selling or letting your premises, or a developer completing a new build — a valid, accurate Non-Domestic EPC is a legal requirement. And with commercial MEES deadlines tightening toward an EPC B requirement, knowing exactly where your property stands before the rules change is not optional — it's essential.
Kieran Bradnock
DEA & NDEA · PAS2035 Retrofit Assessor
Non-domestic EPCs use an Asset Rating (0–150+) — lower scores are better. E is the current legal minimum for let properties. 2028 (C) and 2030–35 (B) targets are consulted on but not yet confirmed in law.
Since April 2023, all privately rented commercial properties must hold EPC E or above — including existing leases. F and G rated properties cannot legally be let. Fines start at £5,000 and can reach £150,000. Check your compliance →
Know where you stand before the deadlines bite. An NDEA assessment gives you a clear picture of your current rating, what it would cost to improve, and whether any exemptions apply — before compliance becomes a crisis.
A current EPC tells you where your property stands today. MEES modelling tells you what it will take to get to where regulations are heading — and what that will cost. For commercial landlords with the EPC B deadline approaching, that distinction matters enormously.
Using the National Calculation Methodology (NCM) — the same software used to produce your non-domestic EPC — I model the impact of specific energy improvement measures on your property's rating. The output shows exactly what your property needs to reach EPC C and EPC B, in order of cost-effectiveness, before you commit to a single pound of expenditure.
The direction of travel for commercial MEES is clear — EPC B is coming, most likely between 2030 and 2035. A significant proportion of commercial stock is currently rated C, D or E. Waiting until the deadline is confirmed before assessing your position is a high-risk strategy. Contractors, materials, and assessors will all be in short supply as deadlines approach — exactly as they were for domestic landlords ahead of 2030.
MEES modelling gives you a clear improvement roadmap with indicative costings — so you can plan capital expenditure, phase improvements across a portfolio, and make informed decisions about which properties to invest in and which to consider selling. This is the information your asset manager, accountant, or bank should be asking for.
A full NCM-modelled improvement report showing your current rating, the measures required to reach EPC C and EPC B, their projected impact on the rating, and indicative costs. Delivered alongside your EPC certificate — or as a standalone instruction if you already hold a current EPC and simply want to understand your compliance exposure going forward.
The EPC B target for commercial properties is not confirmed — but the direction is. Every credible industry source expects a minimum EPC B requirement for let commercial buildings, with a deadline landing between 2030 and 2035. The landlords who understand their exposure now will be the ones who can act calmly, cost-effectively, and on their own terms — rather than under regulatory pressure.
Model my property →A Non-Domestic EPC is a legal requirement in a wide range of situations. If any of the following apply to your property, you need one — and you need it before marketing begins.
Required before the property is marketed for sale. The EPC must be commissioned and made available to prospective buyers at the earliest opportunity — not after a sale is agreed.
Required whenever a commercial property is let to a new tenant, or on formal lease renewal. Must be in place before marketing begins — not at the point of signing.
Required on completion of any new commercial building. New-build commercial EPCs must be carried out by a Level 4 qualified assessor — KIEEPC holds the ABBE Level 4 Diploma and is fully qualified to assess new-build commercial properties.
Works to a building's heating, hot water, air conditioning or ventilation systems may require a new or updated EPC to reflect the change in energy performance. Fabric-only works do not typically trigger this requirement.
Buildings over 500m² that are frequently visited by the public and occupied by a public authority must display their EPC certificate prominently on the premises at all times.
Commercial EPCs are valid for 10 years. An expired EPC doesn't require immediate action — but if you are selling, letting or formally renewing a lease, a current certificate must be in place. Don't let expiry catch you out at transaction time.
Commercial landlords face a phased programme of rising minimum EPC standards. With approximately 60% of commercial stock currently below Band C, the challenge is significant — and the time to act is now.
All privately rented non-domestic properties must hold at least an E rating across all leases — new and existing. Landlords with F or G rated properties cannot legally continue to let them without registering a valid exemption.
The government has consulted on requiring EPC C by April 2028. Around 60% of commercial stock currently falls below this threshold. Final regulations have not been confirmed — but the direction has been clear for years.
The long-term net zero target. No confirmed deadline exists as of early 2026, but only an estimated 28% of commercial stock currently meets this standard — acting early gives landlords the maximum time to plan.
The 2028 and 2030 deadlines have not been confirmed in law. Fines for non-compliance under existing MEES rules start at £5,000 and can reach £150,000 depending on the rateable value of the property and the length of the breach.
As a fully accredited Non-Domestic Energy Assessor holding the ABBE Level 4 Diploma, KIEEPC can carry out EPCs and Part L compliance work across the full range of non-domestic property types — including new-build commercial buildings, extensions, and conversions requiring BRUKL output for Building Control.
All new commercial buildings require an EPC on completion, assessed from plans and specification using SBEM software. A BRUKL document is also required for Building Control Part L sign-off. Both require a Level 4 qualified assessor — KIEEPC holds the ABBE Level 4 Diploma and can deliver both outputs.
Significant extensions to existing commercial buildings and material changes of use (e.g. converting a warehouse to offices) trigger a Part L compliance check and may require a new or updated EPC. A BRUKL document from SBEM is typically required for Building Control. KIEEPC is qualified to carry out this work at Level 3 and Level 4.
From small single-suite offices assessed at Level 3 through to larger multi-floor, multi-zone buildings with complex HVAC systems at Level 4. KIEEPC is qualified across the full range of office and professional premises.
Workshops, light industrial units, storage premises and distribution warehouses. Many straightforward industrial units fall under Level 3 and can be assessed efficiently. Larger or more complex sites with significant heating or ventilation systems are assessed at Level 4.
High street units, retail parks, convenience stores and any lettable retail or consumer-facing space — from small lock-up units at Level 3 to larger premises with more complex building services at Level 4.
Restaurants, cafés, gyms, hotels and other leisure properties. These often present a mix of heating, ventilation and cooling systems — assessed using the National Calculation Methodology (NCM) at the appropriate level for the building's complexity.
Larger HMOs and properties with mixed residential and commercial elements often require a non-domestic EPC — but it isn't always obvious which applies. Converted buildings can fall either way depending on how they are used and let. KIEEPC can advise at no charge on which type of assessment is required.
Clinics, dental practices, nurseries, training centres and other specialist non-domestic uses. These properties frequently have specific ventilation and heating requirements — assessed at the correct level to accurately reflect the building's energy systems.
Unlike domestic EPCs, commercial EPCs are categorised into levels based on the complexity of the building and its energy systems. Getting the right level matters — an incorrectly levelled EPC may not satisfy legal requirements. Here's what each level means and what KIEEPC can cover.
Existing commercial buildings with straightforward characteristics — simple heating systems under 100kW, natural or basic mechanical ventilation, and small comfort cooling under 12kW. Assessed using SBEM software. Does not cover new-build properties.
Typical properties: Small shops, cafes, small offices, modest industrial units, small HMOs.
Larger or more complex existing buildings with heating over 100kW, cooling over 12kW, or sophisticated HVAC systems such as VAV, fan coils or chilled ceilings. Also covers all new-build commercial properties assessed from plans using SBEM software.
Typical properties: Larger offices, retail parks, industrial units, new-build commercial, larger HMOs and mixed-use.
The most complex commercial buildings — large atria, automated blind and vent controls, complex ventilation with enhanced thermal coupling, and other highly specialised building services that cannot be modelled accurately using simplified SBEM methods. Level 5 requires Dynamic Simulation Modelling (DSM) software and a specialist Level 5 qualified assessor.
Typical properties: Major commercial developments, large shopping centres, high-rise office buildings, airports and other highly complex structures.
Not sure which level your property requires? Get in touch — I'll advise you honestly and direct you to a Level 5 assessor if needed.
Tell me about your property and I'll come back to you with a no-obligation quote. Choose how you'd like me to reply — call, WhatsApp, text or email.
I'm a fully accredited Non-Domestic Energy Assessor (NDEA) and Domestic Energy Assessor (DEA) based in Wolverhampton, trading as KIEEPC. I hold the ABBE Level 4 Diploma in Non-Domestic Energy Assessment and carry accreditations with Elmhurst Energy, Quidos and ECMK — covering both domestic and commercial work from a single, accountable point of contact.
Commercial EPCs are not a commodity job. The accuracy of an NCM assessment — and the quality of the improvement recommendations alongside it — directly affects your compliance position and your investment decisions. I work to a high standard, advise honestly about what's required, and won't push you toward work you don't need.
Based in the West Midlands. Available nationally for commercial instructions, portfolio assessments and larger projects.
KIEEPC is based in Wolverhampton and covers the West Midlands and surrounding counties. For commercial instructions, portfolio assessments, new-build projects and larger instructions, nationwide coverage is available — travel is not a barrier for the right project.
Not listed? KIEEPC is available nationwide for commercial instructions, portfolio assessments and new-build projects. Travel is not a barrier for the right project.
Enquire about your location →Answers to the questions KIEEPC gets asked most often about non-domestic EPCs, MEES compliance and assessment levels.
A BRUKL (Building Regulations UK Part L) document is the compliance output produced by SBEM software demonstrating that a new commercial building or significant extension meets the energy efficiency requirements of Part L of the Building Regulations. It is required by Building Control for sign-off on new commercial builds and certain extensions or changes of use — and is separate from, though related to, the EPC. Both are produced from the same SBEM model. KIEEPC holds the ABBE Level 4 Diploma and is qualified to produce BRUKL documents alongside EPCs for new-build commercial properties.
Since April 2023, all privately rented commercial properties in England and Wales must hold a minimum EPC rating of E. Properties rated F or G cannot legally be let. The government has consulted on raising this to EPC C and ultimately EPC B — neither deadline has been confirmed in law, but the direction of travel is settled. Commercial landlords are advised to understand their exposure now rather than wait.
The government has long-signalled an intention to require all let commercial buildings to achieve EPC B, with a target originally associated with 2030. As of early 2026, final regulations have not been confirmed. Industry commentary consistently expects a deadline to land between 2030 and 2035. Commercial landlords are advised to assess their exposure now rather than wait for a confirmed date — preparation time, contractor availability and assessor capacity will all tighten as a deadline approaches.
MEES modelling uses the National Calculation Methodology (NCM) software — the same tool used to produce a non-domestic EPC — to assess what improvement measures a property would need to reach EPC C and EPC B. The output is a clear improvement roadmap with indicative costings, allowing landlords to plan capital expenditure and understand their compliance position before committing to any works. It can be delivered alongside a new EPC or as a standalone instruction against an existing certificate.
Commercial EPCs are categorised by the complexity of the building and its energy systems — not its energy rating. Level 3 covers simple existing buildings: heating under 100kW, basic ventilation, small comfort cooling under 12kW. Typical properties include small shops, cafés and modest offices. Level 4 covers larger or more complex existing buildings — heating over 100kW, sophisticated HVAC such as VAV systems, fan coils or chilled ceilings — and all new-build commercial properties assessed from plans. Level 5 covers the most complex buildings requiring Dynamic Simulation Modelling (DSM) software. KIEEPC holds the ABBE Level 4 Diploma and is qualified to carry out Level 3 and Level 4 assessments, including new-build commercial buildings. Level 5 is outside our current scope — we will advise honestly and refer where needed.
Commercial EPC pricing varies with the size, complexity and assessment level of the property and is always quoted on survey. There is no fixed price list because a small retail unit and a large industrial building require very different assessment time and software modelling. Contact KIEEPC for a no-obligation quote — there is no charge for an initial discussion and no obligation to proceed.
Yes. KIEEPC is based in Wolverhampton and treats the West Midlands as a priority area, but is available nationwide for commercial instructions, portfolio assessments and larger projects. Travel is not a barrier for the right instruction — get in touch to discuss.