If you’re buying, selling, or renting a property in London (or anywhere in the UK), you’ve likely come across the term EPC—short for Energy Performance Certificate. At the heart of the EPC is the energy efficiency rating, graded from A to G. But what does this rating actually mean, and why does it matter?
Let’s break it down so you can better understand how your property performs—and how you can improve it.
What Is an EPC Rating?
An EPC rating measures the energy efficiency of a property. It indicates how much energy your home consumes and how much it costs to heat and power it. The scale runs from:
A (most efficient) to
G (least efficient)
The higher the rating, the lower your energy bills and environmental impact.
Your EPC also includes an Environmental Impact Rating, which shows the property’s CO₂ emissions.
EPC Rating Scale Explained
| Rating | Efficiency | Typical Features |
|---|---|---|
| A (92–100) | Excellent | Very well insulated, modern heating, renewable energy (solar panels/heat pumps) |
| B (81–91) | Very Good | New build homes, double glazing, good insulation |
| C (69–80) | Good | Well-maintained properties with standard efficiency |
| D (55–68) | Average | Older homes with standard boilers, some insulation |
| E (39–54) | Below Average | Poor insulation, outdated heating systems |
| F (21–38) | Poor | High energy bills, single glazing, inefficient appliances |
| G (1–20) | Very Poor | Uninsulated, expensive to run, often non-compliant with rental standards |
Why Your EPC Rating Matters
For Homeowners:
A better rating can increase your property value and make it more attractive to buyers.
For Landlords:
Since April 2020, rental properties in England and Wales must have a minimum EPC rating of E. F or G-rated properties cannot be legally rented out unless exempt.
For Tenants and Buyers:
It helps estimate monthly utility costs and determine how eco-friendly the property is.
What Affects Your Rating?
Several factors influence your EPC score:
Wall, roof, and floor insulation
Windows and doors (double or single glazed)
Type and age of heating system
Use of renewable energy (e.g., solar panels)
Hot water system efficiency
Lighting (use of LED bulbs)
Can You Improve Your EPC Rating?
Absolutely. Here’s how:
Install loft and cavity wall insulation
Upgrade to a modern condensing boiler
Replace single-glazed windows with double glazing
Use low-energy lighting throughout
Add solar panels or a heat pump
These improvements not only enhance your EPC score but also lower your bills and carbon footprint.
Understanding your EPC rating gives you a clearer picture of your property’s energy performance—and what you can do to make it better. Whether you’re preparing a home for sale, making your rental compliant, or simply trying to reduce energy bills, your EPC is the first step toward smarter, more sustainable living.
