A Complete Guide to Business Energy Efficiency and Costs
For businesses, one of the most important tools for measuring and improving energy performance is the Energy Performance Certificate, often shortened to EPC.
This guide explains what an EPC is, how EPC ratings work for business properties, why they matter for business electricity bills, and how improving energy efficiency can help businesses save money and secure better business electricity deals.
What Is an Energy Performance Certificate (EPC)?
An Energy Performance Certificate (EPC) is an official document that shows how energy‑efficient a building is. It applies to both domestic and non‑domestic property, including offices, shops, warehouses, and other business premises.
Each EPC includes an energy efficiency rating from A to G, along with details on current energy performance and estimated usage. It also outlines recommended improvements and shows the potential rating the building could achieve if those changes are made.
An EPC is required when a business property is sold, rented, or newly built. It must usually be available before advertising begins and is valid for ten years unless updated sooner.
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Who Needs a Commercial EPC?
Most business buildings need an EPC, including offices and shared workspaces, retail units, hospitality venues, manufacturing buildings, storage facilities, and public buildings frequently visited by the public.
Some properties are exempt, such as places of worship, temporary buildings, and certain industrial sites with very low energy use. If a business moves into new premises, it should always ask the landlord or current supplier for a copy of the EPC before signing a new contract.
Examples of business buildings that usually need a commercial EPC
- Office buildings and shared workspaces
- Retail shops, showrooms, and shopping units
- Restaurants, cafés, pubs, and hotels
- Warehouses and distribution centres
- Factories and light industrial units
- Leisure facilities such as gyms and cinemas
- Healthcare buildings including clinics and care homes
- Schools, colleges, and training centres
- Public buildings over 500 square metres that are regularly visited
Examples of properties that may be exempt from needing an EPC
- Places of worship, such as churches, mosques, and temples
- Temporary buildings intended to be used for two years or less
- Stand‑alone buildings with a total floor area under 50 square metres
- Certain industrial or agricultural buildings with very low energy demand
- Buildings due to be demolished, where the correct permissions are in place
Understanding EPC Ratings and Energy Performance
Every EPC uses an energy efficiency rating from A to G, with A being the most efficient and G the least. An A‑rated building typically uses significantly less energy, costs less to operate, and produces lower emissions. At the other end of the scale, F and G‑rated properties tend to be expensive to heat and power, which can push up energy bills.
Most UK business properties sit somewhere in the middle. A D rating is common, particularly in older office buildings and mixed‑use premises that have not been upgraded in recent years.
The rating itself is calculated using SBEM (Simplified Building Energy Model). This looks at how the building is constructed and equipped, including heating systems, lighting, insulation, glazing, ventilation, controls, and overall electricity usage. The assessment is carried out by an accredited energy assessor, and once completed, the EPC certificate is lodged on the official register.
EPCs, MEES, and Legal Requirements for Businesses
EPCs are not just informational. They are closely tied to legal obligations under the Minimum Energy Efficiency Standards (MEES).
In England and Wales, most rented business properties must have an EPC rating of E or above. If a property falls into band F or G, it may be unlawful to let unless a valid exemption has been formally registered. Failing to comply can result in financial penalties and enforcement action against the landlord.
How EPC Ratings Affect Business Electricity Costs
A building’s EPC rating can have direct implications on a business electricity prices, energy bills, and overall energy costs. Buildings with poor energy efficiency often use more electricity for heating, lighting, and power, leading to higher electricity usage and increased standing charges. As a result, inefficient buildings usually cost more to run.
Improving energy efficiency can reduce electricity consumption, making it easier to compare business electricity prices, access cheaper electricity, and secure more competitive business electricity tariffs or fixed rate tariffs. Energy suppliers increasingly consider energy performance when offering business electricity rates, particularly for micro businesses and smaller organisations.
Improving Energy Efficiency in Business Buildings
EPCs usually recommend a range of practical improvements, such as:
- Upgrading heating systems
Replacing older boilers or inefficient heating equipment with modern, energy‑efficient systems that use less power and provide better control. - Switching to energy‑efficient lighting
Installing LED lighting and improving lighting layouts to reduce electricity usage and ongoing maintenance costs. - Improving insulation and glazing
Adding or upgrading insulation in walls, roofs, and floors, and replacing single glazing with double or triple glazing to reduce heat loss. - Introducing smart controls
Using timers, sensors, thermostats, and building management systems to control heating, lighting, and power more efficiently.
Making these improvements helps buildings perform more efficiently overall. A higher EPC rating can make a property cheaper to run by reducing energy bills and electricity costs, while also lowering total energy consumption and day‑to‑day energy use.
At the same time, efficiency upgrades support climate change and sustainability targets and help businesses achieve long‑term cost‑saving and efficiency goals, rather than relying on short‑term fixes.
EPCs and Comparing Business Electricity Deals
When comparing business electricity rates, EPCs provide valuable context. Energy‑efficient buildings use less power, carry less risk on variable rate tariffs, and are often better suited to long‑term fixed rate tariffs.
Before switching electricity supplier or agreeing a new deal, businesses should review their EPC rating, current electricity usage, contract terms, and contract end date. This makes it easier to secure the best deal when comparing business electricity tariffs or negotiating a new contract.
Ready to Improve Your Energy Efficiency?
If you want to improve your EPC rating, lower your business electricity bills, or understand how your building’s energy performance affects your energy costs, we can help.
Get in touch to speak to us about improving energy efficiency, reducing costs, and finding the right business energy deal for your needs.
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Frequently Asked Questions:
A stronger EPC rating can make a property more attractive to tenants and justify higher rents, especially where energy costs are a concern. Poor ratings can reduce demand or lead to renegotiation, particularly if upgrades will soon be required to meet regulations.
Yes, in many cases tenants can ask landlords to carry out energy efficiency improvements, particularly where the building falls below minimum legal standards. However, outcomes depend on lease terms and whether exemptions apply.
Improvements that raise EPC ratings can reduce real energy usage, however many factors can contribute to this. Upgrades like better insulation or efficient lighting can cut consumption, which may directly lower electricity costs over time.
Yes, EPC ratings are often used as an indicator of building performance. Improving your rating can support wider environmental goals and demonstrate progress to stakeholders, investors, or regulators.
Not always. While newer buildings often meet higher efficiency standards, older buildings that have been refurbished or upgraded can achieve strong ratings too. Condition and upgrades matter more than age alone.
Even though EPCs last up to ten years, it is worth reviewing performance regularly, especially if energy costs are rising or you are considering switching suppliers. A new EPC after improvements can reflect gains and support better energy deals.
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