An Energy Performance Certificate (EPC) rates how energy-efficient your property is. The rating scale ranges from A (most efficient) to G (least efficient). Each letter grade also corresponds to a numerical score out of 100, which reflects the overall energy efficiency of your home or building.

Understanding EPC Ratings

  • A (92-100) – Most efficient

  • B (81-91)

  • C (69-80) – Average for UK homes

  • D (55-68)

  • E (39-54)

  • F (21-38)

  • G (1-20) – Least efficient

What Affects Your EPC Rating?

Several factors determine your EPC score, including:

  • Type of heating system

  • Insulation quality (roof, walls, floor)

  • Double glazing and window performance

  • Lighting efficiency

  • Renewable energy sources (solar panels, heat pumps)

  • Air tightness and ventilation

Your EPC will also come with a recommendation report, which lists practical improvements to boost your rating and reduce energy bills.

Why EPC Ratings Matter

A higher EPC rating:

  • Helps sell or rent your property faster

  • Can increase property market value

  • Saves money on energy bills

  • Ensures compliance with legal rental requirements

Need an EPC in London?

At EPCrate.co.uk, we are experienced EPC assessors providing fast, affordable, and compliant certificates across London.