EPC When Buying a Property in London: What Buyers Should Know
Buying a property is a major decision. Along with the location, price, condition and size of the property, energy efficiency is another factor worth checking.
An EPC when buying a property can give you useful information about the home’s energy performance. It provides an energy efficiency rating from A to G and includes recommendations that may help improve the property.
For buyers in London, understanding the EPC before completing a purchase can help you identify potential energy improvements and future costs.
What Is an EPC?
An Energy Performance Certificate, commonly called an EPC, shows how energy efficient a property is.
The certificate gives the property an energy rating from A to G.
It also provides information about the property’s energy performance and recommends improvements that could make the property more energy efficient.
If you are buying a home, you can check whether an EPC already exists before arranging a new assessment.
The official GOV.UK Energy Performance Certificate service allows you to search for an existing certificate.
Do Buyers Need an EPC?
The buyer does not normally arrange an EPC simply because they are purchasing a property.
The seller is generally responsible for providing an EPC when a property is being marketed for sale, subject to applicable exemptions.
This means you should normally be able to review the property’s EPC while considering the purchase.
However, an EPC is not a substitute for a full property survey.
The certificate focuses on energy performance rather than structural condition, damp, electrical safety or other issues that may require specialist inspection.
What Should Buyers Look for on an EPC?
When reviewing an EPC, do not only look at the large A to G rating.
There are several other useful sections to check.
Current Energy Rating
The current rating gives you an indication of the property’s energy efficiency.
A higher rating generally indicates better energy efficiency than a lower rating.
However, the rating should be considered alongside the property’s age, construction, heating system and other characteristics.
Potential Rating
Many EPCs also show an indication of how the property could perform after recommended improvements.
This can help you understand whether there may be opportunities to improve the home’s energy performance.
Do not assume that reaching the potential rating will be cheap or straightforward.
The cost and practicality of improvements can vary significantly between properties.
Recommended Improvements
The EPC includes recommendations for potential energy improvements.
These may include measures relating to:
Insulation
Heating
Windows
Lighting
Hot water
Renewable energy
Review these recommendations before making your final decision.
They can help you identify improvements that may need to be considered after moving into the property.
Can an EPC Tell You How Much Your Energy Bills Will Be?
Not exactly.
An EPC can provide useful energy-related information, but it should not be treated as a precise prediction of your future bills.
Actual energy costs depend on many factors.
These include:
How much energy you use
The temperature you prefer
The number of people living in the property
Energy prices
How often the heating is used
The property’s condition
Weather conditions
Therefore, use the EPC as an indication of energy performance rather than a guaranteed bill estimate.
Should You Avoid a Property With a Low EPC Rating?
Not necessarily.
A low rating does not automatically mean that a property is a bad purchase.
Some older London properties naturally have lower energy ratings because of their construction.
For example, period properties may have solid walls or older heating systems that make energy improvements more complicated.
Instead of immediately rejecting a property, look at the recommendations and consider what improvements may realistically be possible.
Our guide on How to Improve Your EPC Rating Before You Sell or Let explains some of the improvements that can affect EPC performance.
Although that article is aimed at owners and landlords, the improvement principles can also help prospective buyers understand what may be involved.
Check the Age of the EPC
An EPC is generally valid for 10 years unless it has been replaced by a newer certificate.
Therefore, check the certificate date when reviewing a property.
A newer EPC may provide more current information about the property’s features.
If the property has undergone major improvements since the EPC was produced, ask whether a newer certificate is available.
You can search for certificates using the official GOV.UK Find an Energy Certificate service.
What If the Property Has Been Recently Improved?
A property may have undergone improvements after its existing EPC was issued.
For example, the owner may have:
Replaced the boiler
Added insulation
Installed new windows
Changed the heating system
Installed solar panels
Improved lighting
If these changes were made after the EPC assessment, they may not be reflected in the existing certificate.
If energy efficiency is important to your purchase decision, ask the seller or estate agent about recent improvements.
You can also ask whether supporting documents or installation records are available.
EPC vs Property Survey
It is important to understand the difference between an EPC and a property survey.
An EPC focuses on energy performance.
A property survey looks at the physical condition of the building.
An EPC does not replace a survey.
If you are buying a property, consider both sources of information before making a decision.
The EPC can help you understand energy performance, while a suitable property survey can identify potential building or maintenance issues.
What Can Make an EPC Rating Lower?
Several characteristics can influence a property’s energy rating.
These may include:
Older heating systems
Poor insulation
Older glazing
Inefficient lighting
Construction type
Hot water systems
Property size and layout
The reason behind the rating is therefore more important than simply looking at the letter.
For example, two properties with the same EPC rating could require completely different improvements.
Buying a Flat in London?
If you are purchasing an apartment, there can be additional factors to consider.
The EPC relates to the individual property, but some improvements may depend on the building itself.
For example, changes involving external walls, communal areas or building-wide systems may require agreement or coordination with the freeholder or management company.
If you are buying a London flat, read our guide EPC for Flats London: What Flat Owners Need to Know for more information.
What Should Buyers Ask Before Completing?
If the EPC raises questions, consider asking the seller or estate agent:
When was the EPC issued?
Has the property been improved since the EPC assessment?
Has the heating system been replaced?
Has insulation been added?
Have the windows been replaced?
Are there records of recent energy improvements?
Are there any known issues with the heating system?
Is a newer EPC available?
These questions can give you more context before making a final decision.
What If You Plan to Renovate?
If you are planning a renovation after buying the property, the EPC can be a useful starting point.
Look at the recommendations and identify improvements that fit with your renovation plans.
For example, if you already plan to replace windows or upgrade heating, you can consider energy efficiency at the same time.
Planning improvements together can sometimes be more practical than completing separate projects later.
However, always consider the actual condition of the property and obtain professional advice where necessary.
EPC and Future Property Costs
The purchase price is not the only cost to consider when buying a property.
Future expenses can include:
Heating
Maintenance
Insulation improvements
Window upgrades
Heating replacement
General renovation
Property management
The EPC can help highlight potential energy improvements.
It should therefore be one part of your wider property research.
What Happens After You Buy?
Once you become the owner, you can decide whether to make improvements based on your budget and plans.
If you make significant energy improvements, you can consider obtaining an updated EPC later.
A new assessment can record the property’s updated energy-related features.
For more information about what an EPC assessment involves, see What Does an EPC Assessment Include?.
EPC When Buying a Property: Simple Buyer Checklist
Before completing your purchase, check the following:
EPC
Find the property’s current EPC.
Check the certificate date.
Check the current rating.
Review the recommendations.
Check the potential rating.
Ask about improvements made since the assessment.
Property
Consider the heating system.
Check the windows and glazing.
Ask about insulation.
Consider the property’s age and construction.
Review any planned renovation work.
Professional Checks
Arrange an appropriate property survey.
Ask relevant questions about the heating system.
Check available documentation.
Get specialist advice where required.
Final Thoughts
An EPC when buying a property can provide useful information before you commit to a purchase.
It can help you understand the property’s current energy performance and identify possible improvements.
However, the EPC should not be considered on its own.
Combine it with a property survey, information from the seller or estate agent and your own assessment of the property’s condition.
If you are buying a London property and want to understand its energy performance, checking the existing EPC is a simple place to start.
For sellers, landlords and property professionals who need a new certificate, you can check the latest EPC pricing in London or book EPC, floor plan and property photography services.
For the latest official requirements, always check GOV.UK’s Energy Performance Certificate guidance.