What Is a Commercial EPC? Everything Business Owners Need to Know

Energy efficiency has become an increasingly important consideration for commercial property owners, landlords, investors and occupiers.

Whether you own an office, retail unit, warehouse, restaurant, industrial building or mixed-use property, understanding your Commercial Energy Performance Certificate (EPC) is an important part of property management and compliance.

A Commercial EPC can influence leasing decisions, investment strategies, refurbishment planning, operational costs and regulatory compliance.

This guide explains what a Commercial EPC is, when it is required, how assessments work and why commercial property owners are paying closer attention to EPC performance than ever before.

Founded in 2015 by Jino Jose, EPCRATE provides Commercial EPCs, Domestic EPCs, Floor Plans and Draft EPC Reviews across London.

What Is a Commercial EPC?

A Commercial Energy Performance Certificate (EPC) measures the energy efficiency of a non-domestic building.

The certificate provides a rating from A (most energy efficient) to G (least energy efficient).

Commercial EPCs commonly apply to:

• Offices.
• Retail premises.
• Warehouses.
• Industrial units.
• Restaurants and cafés.
• Hotels.
• Healthcare facilities.
• Educational buildings.
• Mixed-use commercial properties.

The certificate typically includes:

• Energy efficiency rating.
• Environmental impact information.
• Carbon emissions data.
• Recommended improvement measures.

When Is a Commercial EPC Required?

A Commercial EPC is commonly required when:

• Selling commercial property.
• Granting a new lease.
• Marketing commercial premises.
• Constructing certain new buildings.
• Completing certain major modifications.

Requirements can vary depending on the property and circumstances.

Property owners should seek professional advice where uncertainty exists.

Why Commercial EPCs Matter More Than Ever

Commercial EPCs are no longer viewed solely as a compliance document.

Many investors, landlords, lenders and occupiers now consider energy performance when evaluating commercial assets.

A stronger EPC rating may support:

• Improved marketability.
• Asset management planning.
• Refurbishment strategies.
• Occupier attractiveness.
• ESG reporting objectives.
• Long-term investment planning.

Minimum Energy Efficiency Standards (MEES)

Many rented commercial properties are subject to Minimum Energy Efficiency Standards (MEES). Our MEES guide explains how these standards work.

These regulations can affect a landlord’s ability to continue letting certain properties unless relevant requirements or exemptions apply.

Landlords should regularly review:

• EPC validity.
• Current EPC rating.
• Exemption status.
• Upcoming lease events.

Future regulatory changes remain subject to legislation and government policy. Our guide to commercial EPC compliance and penalties covers enforcement in more detail.

How Does a Commercial EPC Assessment Work?

A qualified Non-Domestic Energy Assessor (NDEA) will inspect the property and collect information relating to:

• Heating systems.
• Cooling systems.
• Ventilation systems.
• Hot water systems.
• Lighting.
• Building fabric.
• Renewable technologies.
• Building size and layout.

The building is then modelled using approved software to generate the EPC.

Depending on the property type, methodologies may include SBEM or other approved modelling approaches.

How Long Does a Commercial EPC Take?

The duration varies depending on the complexity of the building. Our guide on how long an EPC takes covers both domestic and commercial assessments.

Property Type	Typical Assessment Time
Small office or retail unit	Approximately 1 hour
Medium commercial building	1–3 hours
Large or complex property	Several hours or longer

Commercial EPCs generally remain valid for 10 years from the date of issue.

What Influences a Commercial EPC Rating?

Numerous factors contribute to the final rating.

Examples include:

• Lighting efficiency.
• HVAC performance.
• Building insulation.
• Heating controls.
• Renewable technologies.
• Building management systems.
• Hot water systems.
• Building fabric characteristics.

Even buildings of a similar size can achieve significantly different ratings depending on these factors.

How Can Commercial Property Owners Improve Their EPC?

Improvement opportunities vary between properties, but commonly include:

• LED lighting upgrades.
• Improved controls and zoning.
• HVAC upgrades.
• Insulation improvements.
• Renewable technologies.
• Building management systems.

No improvement guarantees a particular EPC rating because outcomes depend on the building, available evidence and assessment methodology.

Commercial EPCs and Property Transactions

Commercial EPCs are frequently reviewed during:

• Property acquisitions.
• Disposals.
• Lease negotiations.
• Refinancing.
• Portfolio reviews.
• Due diligence exercises.

An expired EPC or compliance issue can create avoidable delays during transactions.

Commercial EPCs and Refurbishment Planning

Many commercial property owners undertake improvement works without fully understanding how those changes may influence EPC outcomes.

Reviewing EPC performance before major expenditure can support more informed decision-making.

This is particularly relevant when planning:

• Office refurbishments.
• Retail upgrades.
• Industrial improvements.
• Energy efficiency projects.
• Asset repositioning strategies.

How a Draft EPC Review Can Help

EPCRATE’s Draft EPC Review service can help commercial property owners better understand their current position before committing significant expenditure.

A Draft EPC review may help:

• Review current EPC performance.
• Identify supporting evidence.
• Explore potential improvement pathways.
• Support budgeting decisions.
• Assist long-term asset planning.

However, a Draft EPC Review does not guarantee a future EPC rating, compliance outcome, financing outcome or improvement result.

Why Supporting Evidence Matters

Commercial buildings often contain systems and improvements that may require supporting documentation.

Useful records can include:

• Lighting schedules.
• Mechanical and electrical specifications.
• HVAC documentation.
• Renewable technology certificates.
• Building management system records.
• Building control documentation.

Providing accurate information helps ensure building features are appropriately reflected within the assessment process where methodologies permit.

Why Choose EPCRATE?

• Founded in 2015 by Jino Jose, DEA accredited.
• NDEA-accredited assessors for commercial EPCs.
• ★★★★★ Trustpilot Reviews.
• ★★★★★ Google Reviews.
• Commercial EPC specialists.
• Coverage across all London boroughs.
• Draft EPC Review Service available.
• EPC & Floor Plan Bundles available.
• Greater London Energy Efficiency Awards – Commended 2024.
• Greater London Energy Efficiency Awards – Highly Commended 2025.

Frequently Asked Questions

Need a Commercial EPC in London?

EPCRATE provides commercial EPC assessments by accredited Non-Domestic Energy Assessors (NDEA) across all 32 London boroughs, with pricing from £180 depending on the size and complexity of the building. See our full guide to commercial EPC costs, process and timeline.

Call 020 3488 4142 to discuss your commercial property, or book your assessment online.

Final Thoughts

A Commercial EPC is far more than a compliance document. It provides valuable information that can support investment decisions, refurbishment planning, regulatory compliance and long-term asset management.

For landlords, investors, developers and business owners, understanding EPC performance early can help reduce risk and support better property decisions.