A low EPC rating (F or G) on a commercial property can limit your ability to rent, reduce tenant interest, and even lead to legal penalties under MEES (Minimum Energy Efficiency Standards). Fortunately, there are fast, cost-effective steps you can take to improve your rating.

1. Upgrade Lighting

Switching from traditional halogen or fluorescent lighting to LED or energy-efficient lighting is one of the quickest ways to improve your EPC rating:

  • Reduces electricity consumption

  • Lowers running costs

  • Often approved as a “quick fix” in EPC recommendations

Book an assessment to see potential improvements:
https://epcrate.co.uk/booking/

2. Insulate the Building

Proper insulation can significantly improve energy efficiency:

  • Roof and loft insulation

  • Wall cavity or external wall insulation

  • Floor insulation where applicable

Even partial insulation upgrades can help raise your EPC band quickly, especially if your property previously had minimal insulation.

See assessor guidance:
https://epcrate.co.uk/services-epc-assessors-london/

3. Upgrade Heating Systems

Heating is a major factor in EPC calculations. Consider:

  • Replacing old boilers with modern condensing boilers

  • Installing programmable thermostats or smart heating controls

  • Switching to low-carbon or energy-efficient heating (heat pumps, hybrid systems)

These changes can increase your EPC rating and reduce long-term running costs.

4. Improve Glazing and Windows

Windows affect heat retention and energy loss:

  • Replace single-glazed windows with double or triple glazing

  • Seal draughts around windows and doors

  • Add thermal blinds or film if replacement is not feasible

These steps are often highlighted in EPC recommendations for quick improvements.

5. Install Renewable or Low-Carbon Technology

  • Solar PV panels for electricity generation

  • Solar water heating systems

  • Integration of efficient lighting and heating controls

While slightly more expensive, these upgrades have a high impact on EPC scores and future-proof your property.

6. Minor Quick Fixes

  • Insulate hot water cylinders

  • Replace inefficient fans or pumps

  • Seal ducts to prevent heat loss

  • Reduce unnecessary standby energy usage

Small adjustments can sometimes raise your rating by one band without major renovations.

7. Reassess the Property

After improvements, book a new commercial EPC assessment. The assessor will:

  • Measure the updated systems

  • Update the energy model using SBEM software

  • Lodge the new certificate on the national register

Check cost before booking:
https://epcrate.co.uk/pricing/

✅ Key Takeaways

  • Focus on lighting, heating, insulation, and glazing first

  • Minor adjustments can improve EPC quickly

  • Larger renewable upgrades add long-term value

  • Always follow up with a new EPC assessment to reflect improvements

Meet the assessors:
https://epcrate.co.uk/about-us-epc-company-london/

Office: 150–160 City Road, London, EC1V 2NX
Phone: 020 3488 4142
Email: info@epcrate.co.uk