If your Energy Performance Certificate (EPC) score is lower than expected, you’re not alone. Many property owners in London are surprised by a low EPC rating, but understanding the key contributors can help you take action. Below, we explore the most common factors dragging down your EPC—and what you can do to improve it.

🔍 What Causes a Low EPC Rating?

1. Poor Insulation

Insufficient loft, cavity wall, or floor insulation leads to excessive heat loss. If your home isn’t properly insulated, your EPC score will suffer.

2. Inefficient Heating Systems

Older boilers and non-programmable thermostats are red flags during an EPC assessment. Consider upgrading to a modern, energy-efficient system.

3. Single-Glazed Windows

Properties with single glazing lose more heat compared to double or triple-glazed units. This significantly impacts your EPC grade.

4. Outdated Lighting

Traditional incandescent bulbs use far more energy than LED alternatives. Replacing all lights with energy-saving options can boost your rating.

5. Lack of Renewable Energy Sources

Homes without solar panels, heat pumps, or other renewable systems often miss out on valuable EPC points.

6. Uninsulated Hot Water Cylinders

Failing to insulate your hot water cylinder can result in a surprising energy penalty during your assessment.

💡 How to Improve Your EPC Score

  • Install modern insulation throughout the property.

  • Upgrade your central heating system.

  • Switch to double-glazed windows and energy-efficient lighting.

  • Explore renewable options like solar panels or heat pumps.

Want to speak to professionals about your rating? Book an EPC assessment today for expert guidance.

🤝 Why Choose EPCrate.co.uk?

At EPCrate.co.uk, we provide fast, professional EPC assessments across London. Our qualified assessors ensure your certificate is both accurate and delivered on time. Whether you’re selling, renting, or just want to know how energy-efficient your home is, we’re here to help.

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📝 Final Thought

EPC scores are not just a legal formality—they reflect the real energy performance of your property. Don’t let a low rating affect your property value or rental eligibility. Take steps now to improve your home’s efficiency and compliance.