Understand Your EPC Rating: What Does It Mean?

By Ian on Saturday 15th July 2023

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When it comes to energy efficiency, the Energy Performance Certificate (EPC) rating plays a crucial role. In this article, we’ll explore how EPC ratings are generated and what each rating signifies for your property. If you understand your EPC rating, it can help you make informed decisions to improve your energy efficiency and reduce your environmental impact.

EPC Rating Bands and SAP Points

The EPC rating is graded from band G (worst) to band A (best), determined by SAP points. During an EPC assessment, the energy assessor collects various observations about your property, which are then input into software that generates SAP points. The scale ranges from 0 to 100, with different bands corresponding to different points:

  • Band A: 92-100 SAP Points
  • Band B: 81-91 SAP Points
  • Band C: 69-80 SAP Points
  • Band D: 55-68 SAP Points
  • Band E: 39-54 SAP Points
  • Band F: 21-38 SAP Points
  • Band G: 1-20 SAP Points

Understanding Each EPC Rating Band

EPC Band A

If your property has an A rating, congratulations! You have one of the most energy-efficient homes in the UK. Properties in this band typically have minimal recommendations on the EPC, indicating their already high level of energy efficiency. It’s common to find features like solar panels or solar water heating in Band A homes.

EPC Band B

A Band B rating is excellent, with SAP points ranging from 81 to 91. It signifies a high level of energy efficiency and exceeds the UK average rating of Band D. While there is still room for improvement, properties in this band are already performing well. EPC recommendations might include exploring additional technologies like solar and wind power.

EPC Band C

Properties with a Band C rating have an above-average EPC grade. This band indicates that your home is using energy efficiently, and if it’s a rental property, it meets the upcoming minimum energy efficiency standards. Recommendations may involve upgrades to wall and floor insulation to further improve energy efficiency.

EPC Band D

The average EPC rating for properties in England is Band D. If your property falls into this band, there is room for improvement to reduce your energy costs. Review the recommendation section of your EPC report, which may include suggestions such as wall, floor, and loft insulation. Don’t forget to check if all your light bulbs are energy-saving as well.

EPC Band E

For rental properties in Band E, you’re starting to reach to lower end of the scale. These properties require investment to enhance their energy efficiency. Energy bills may be higher than necessary, and the property’s carbon footprint is likely significant. Quick wins to consider include proper loft insulation (at least 270mm), energy-saving light bulbs, and an efficient gas boiler system.

EPC Band F

Properties in Band F will require significant investments to reach an acceptable energy efficiency level. These properties may have poor insulation, single-glazed windows, or electric heating systems. If you own a property in this band, focus on fundamental improvements like loft insulation, energy-saving light bulbs, double-glazed windows, and an efficient boiler system.

EPC Band G

At the bottom end of the spectrum, Band G is the worst EPC rating. Properties in this band suffer from substantial heat loss and high energy costs. They are not suitable for renting. To improve the rating, expect substantial investments to address issues such as unfilled cavities or solid walls. The EPC report will provide recommendations tailored to your property, but significant improvements will be necessary.


To understand your EPC rating is crucial for homeowners looking to improve their energy efficiency and reduce environmental impact. By knowing your property’s rating and the corresponding recommendations, you can take targeted steps to enhance energy efficiency, lower your energy bills, and contribute to a more sustainable future.

Remember, consulting professional energy assessors can provide personalized advice and guidance to help you achieve optimal energy efficiency for your property.

We hope this article has provided valuable insights into EPC ratings and their significance for your property.

About the Author

About Ian Kay

Ian is a seasoned energy assessor helping his customers, reduce energy usage and save money on their bills. He holds qualifications from both City & Guilds and ABBE for Domestic EPCs and Commercial EPCs (Level 3 NDEA and Level 4 NDEA). With a background in the building trade he can provide his customers with a unique perspective and advice. Ian combines his deep industry knowledge with practical advice to create blog posts that help visitors understand the complexities of energy performance certificates and reducing operating costs. When not immersed in the world of energy assessments, Ian enjoys exploring the great outdoors and spending quality time with his family.

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