If your commercial property has an F or G EPC rating, you could face serious restrictions under the UK’s Minimum Energy Efficiency Standards (MEES). In 2026, landlords must ensure their buildings meet at least an E rating to legally let most commercial properties.
The good news? Many low EPC ratings can be improved quickly with targeted, practical upgrades — without full-scale renovations.
Why Acting Now Is Critical
Under the Energy Efficiency (Private Rented Property) Regulations 2015, enforced by the Department for Energy Security and Net Zero, landlords cannot grant new leases on substandard properties unless exemptions apply.
Risks of a low EPC include:
Inability to lease or renew tenancies
Financial penalties
Public registration of non-compliance
Reduced property value
Improving your rating protects both income and asset performance.
Step 1: Understand What’s Pulling Your Score Down
Before spending money, review your current EPC recommendation report. It highlights:
Inefficient lighting systems
Poor insulation
Outdated heating or cooling systems
Lack of controls or zoning
High carbon emissions
If your certificate is outdated, consider reassessment to ensure accuracy before upgrading.
Practical Solutions to Improve a Low Commercial EPC
Below are proven methods that typically produce measurable improvements in 2026.
1. Replace Old Lighting with LED Systems
Fastest improvement available
Lighting significantly impacts EPC calculations in commercial buildings.
✔ Install LED panels or bulbs
✔ Add motion sensors in low-use areas
✔ Install daylight-responsive controls
Completion time: 1–3 days
Impact level: Moderate to High
For offices and retail units, this alone can sometimes shift a property from F to E.
2. Upgrade Heating Systems or Improve Controls
Heating systems heavily influence energy ratings.
Practical improvements include:
Installing a modern condensing boiler
Adding programmable thermostats
Installing thermostatic radiator valves
Zoning large spaces for better efficiency
Even small heating upgrades can significantly reduce calculated energy demand.
3. Improve Insulation
Heat loss is a common issue in older commercial buildings.
Focus on:
Roof or loft insulation
Pipe and duct insulation
Suspended ceiling insulation
Cavity wall insulation (where applicable)
Improved insulation reduces overall building heat demand — a key EPC scoring factor.
4. Optimise HVAC & Air Conditioning
Older HVAC systems often lower EPC scores due to poor efficiency ratings.
Consider:
✔ Replacing outdated air conditioning units
✔ Installing variable speed drives
✔ Upgrading to inverter-driven systems
✔ Improving ventilation controls
In larger buildings, HVAC optimisation can produce substantial improvements.
5. Install Smart Energy Management Systems
Building Management System (BMS) optimisation can deliver measurable gains without full replacement.
Examples:
Adjust heating/cooling schedules
Install occupancy sensors
Automate lighting systems
Improve calibration of sensors
Sometimes optimisation alone improves your rating band.
6. Add Renewable Energy (Higher Investment, Strong Impact)
Solar photovoltaic panels significantly improve carbon emission scores.
While installation takes longer, renewables can:
Increase EPC banding
Improve tenant appeal
Reduce long-term operating costs
Quick Compliance Plan for 2026
If you’re currently rated F or borderline E:
Upgrade lighting immediately
Improve heating controls
Optimise HVAC systems
Reassess the property
Plan insulation or renewables next
This staged approach keeps costs manageable while improving compliance quickly.
How Much Can Your Rating Improve?
With targeted upgrades, many commercial properties move:
F → E (minimum compliance level)
E → D (better asset positioning)
D → C (with significant upgrades)
The key is prioritising measures that heavily influence EPC software calculations.
Don’t Forget Reassessment
Improvements do not automatically update your certificate.
You must:
✔ Complete the upgrades
✔ Arrange a new Commercial EPC assessment
✔ Receive an updated certificate
Qualified assessors, including professionals registered with bodies such as the Royal Institution of Chartered Surveyors, ensure improvements are properly recorded.
Final Thoughts
A low Commercial EPC rating in 2026 is not a permanent problem — but it is a compliance risk.
The most practical solutions include:
✔ LED lighting upgrades
✔ Heating system improvements
✔ Smart energy controls
✔ Insulation enhancements
✔ HVAC modernisation
✔ Renewable energy installation
By acting strategically, you can improve your rating quickly, maintain legal compliance, and enhance your property’s market value.
Office: 150–160 City Road, London, EC1V 2NX
Phone: 020 3488 4142
Email: info@epcrate.co.uk
