How to Prepare for an EPC Assessment in London: A Practical Checklist
Preparing for an EPC assessment does not have to be complicated. Whether you are selling a home, renting out a property or getting ready to market a London property, a little preparation can help the assessment run smoothly.
An Energy Performance Certificate provides information about a property’s energy efficiency and includes an energy rating from A to G. If you are selling or renting a property, it is important to check whether you already have a valid EPC before arranging a new assessment.
You can check an existing certificate through the official GOV.UK Find an Energy Certificate service.
If you need a new assessment, here is a practical checklist to help you prepare.
1. Check Whether You Already Have a Valid EPC
Before booking an EPC assessment, check whether your property already has a valid certificate.
EPCs are generally valid for 10 years. If your existing certificate is still valid, you may not need another assessment simply because you are selling or letting the property.
The official GOV.UK service allows you to search for an existing EPC using information such as the postcode, street name or certificate number.
This is a useful first step because it can prevent you from arranging an unnecessary assessment.
If your EPC has expired or you cannot find a valid certificate, you may need to arrange a new one.
For more information, read our guide on EPC certificate renewal and when London landlords need one.
2. Make Sure the Property Is Accessible
One of the simplest ways to prepare for an EPC assessment is to make sure the assessor can access the relevant areas of the property.
Depending on the property, the assessment may involve looking at features such as:
Heating systems
Hot water systems
Windows and glazing
Lighting
Insulation
Roof or loft areas
Walls and floors
Ventilation
Heating controls
The exact information required can vary depending on the property.
Before the appointment, make sure rooms, cupboards and relevant equipment are reasonably accessible.
There is no need to completely empty your property. However, moving items that block important areas can make the visit easier.
3. Locate Any Property Documents You Have
If you have documents relating to the property’s construction, heating or energy improvements, keep them available.
Useful information may include documentation relating to:
Boiler installation
Heating systems
Loft insulation
Wall insulation
Double glazing
Solar panels
Extensions
Renewable energy systems
Previous energy improvements
Having supporting information available can help the assessor understand the property more accurately where relevant evidence can be used.
Do not worry if you do not have every document. Your assessor can explain what information is required for the assessment.
4. Check Your Heating System
Heating is an important part of a property’s energy performance.
Before the assessment, make sure the assessor can access the boiler, heating controls and other relevant heating equipment.
If you have recently replaced your boiler or heating system, keep any installation documentation available.
For example, you may have:
Boiler installation records
Product information
Installation certificates
Heating system documentation
Information about heating controls
Keeping these documents together can make it easier to provide relevant evidence during the assessment.
5. Check Windows and Glazing
Windows can also form part of the information considered during an EPC assessment.
If your property has double glazing or other improvements, make sure the relevant areas are accessible.
If you have documentation confirming when windows were installed or providing information about the glazing, keep it available where possible.
You do not need to replace windows simply because you are having an EPC assessment.
The purpose of the assessment is to evaluate the property’s existing characteristics rather than to require you to carry out improvements before the assessor visits.
6. Make Loft and Insulation Areas Accessible
If your property has a loft or accessible insulation area, make sure the assessor can reach it safely where inspection is required.
If insulation has been installed, any available documentation can also be useful.
You should not attempt to make unsafe areas accessible yourself.
Instead, tell the assessor about any access restrictions when arranging the appointment.
7. Do Not Carry Out Unnecessary Improvements Just Before the Assessment
One common mistake is assuming that a property needs to be upgraded before an EPC assessment.
That is not necessarily the case.
An EPC assessment is intended to assess the property’s existing energy characteristics. You do not need to install new insulation, replace windows or change your heating system simply to prepare for the appointment.
If your EPC later recommends improvements, you can then decide which changes make sense for your property.
The recommendations section of the EPC can help you understand potential energy-efficiency improvements.
If you are unsure what the information on your certificate means, our guide explains how to read an EPC certificate in simple terms.
8. Tell the Assessor About Recent Changes
Have you recently made improvements to your property?
Tell the assessor.
For example, mention relevant changes such as:
A new boiler
New insulation
Replacement windows
Solar panels
Heating controls
Loft insulation
Other energy-efficiency improvements
Where appropriate, provide supporting documents.
This information can help the assessor establish the property’s current characteristics.
9. Keep the Property Address and Details Ready
When arranging an EPC, make sure the property information you provide is accurate.
Double-check:
Property number or name
Street
Town
Postcode
Property type
Number of bedrooms
Accurate information helps avoid unnecessary confusion when arranging the appointment.
If you are preparing the property for sale or rental, it is also worth keeping your EPC information together with your other property documents.
10. Think About Your Property Listing at the Same Time
An EPC is only one part of preparing a property for the market.
If you are selling or renting your London property, you may also need professional photographs and a floor plan.
A good property listing can bring these elements together:
EPC: Provides energy-performance information.
Professional photography: Shows the property’s appearance.
Floor plan: Helps buyers and tenants understand the layout.
This is why it can be useful to organise your property marketing materials around the same time.
Our Property Listing Checklist for London covers other things to prepare before your property goes live.
You can also read EPC Before Marketing a Property: What Sellers Need to Know for more information about EPCs and property marketing.
What Happens During an EPC Assessment?
Once the appointment starts, the assessor will collect information about the property’s construction and energy-related features.
Depending on the property, this can include information about:
Building construction
Heating
Hot water
Windows
Lighting
Insulation
Ventilation
Renewable technologies
The information is then used to produce the EPC.
The resulting certificate includes an energy efficiency rating and recommendations for potential improvements.
The exact assessment time can vary depending on the size, type and complexity of the property.
If you want to understand the process in more detail, read our guide on what to do after an EPC assessment in London.
Do You Need a Same Day EPC in London?
Sometimes an EPC is needed quickly.
For example, you may have:
A property going on the market soon
A tenancy deadline
An urgent sale
A delayed property listing
A certificate that has expired unexpectedly
Urgent EPC provides a Same Day EPC service for customers who need an EPC quickly, subject to appointment availability.
The important thing is to check your EPC requirements early rather than leaving the assessment until the last moment.
Preparing for an EPC Assessment in South London
Urgent EPC provides EPC services across London and South London.
The wider service area includes locations such as:
Croydon
Thornton Heath
Mitcham
Clapham
Streatham
Tooting
Sutton
Surrey and surrounding areas
For example, property owners searching for an EPC in Croydon CR0 or CR2, EPC in Mitcham CR4, EPC in Clapham SW4 or SW9, EPC in Streatham SW16, EPC in Tooting SW17 or EPC in Sutton SM1–SM3 can check current availability when booking.
Always confirm availability for your specific postcode before arranging an appointment.
EPC, Photography and Floor Plan: Prepare Everything Together
If you are preparing a property for sale or rent, you may prefer to arrange the main property marketing services together.
Urgent EPC provides:
EPC assessments
Same Day EPC services
Professional property photography
Property floor plans
A combined booking can make the process easier because you can organise several important property marketing requirements through one provider.
If you are preparing a complete listing, explore the Property Marketing Package London: EPC, Photography & Floor Plans guide.
You can also view the Urgent EPC property services to see the available options.
Where a combined booking is available at an approved discounted price, check the current pricing before booking. Pricing and availability can change.
EPC Assessment Preparation Checklist
Before your assessor arrives, use this quick checklist:
Before booking
Check whether your property already has a valid EPC.
Search the official EPC register.
Check the certificate expiry date.
Decide whether you need a new assessment.
Check your property address and postcode.
Before the appointment
Make the property accessible.
Make the boiler and heating controls accessible.
Make relevant windows and insulation areas accessible.
Gather available documents for recent improvements.
Tell the assessor about significant property changes.
Mention any access restrictions in advance.
Before marketing
Confirm you have the correct EPC information.
Arrange professional property photography if required.
Arrange a property floor plan.
Prepare your property description.
Give the required information to your estate or letting agent.
Frequently Asked Questions
How should I prepare for an EPC assessment?
Make sure the assessor can access relevant areas of the property, including heating equipment and other energy-related features. Keep documentation for recent improvements available if you have it.
Do I need to clean my property before an EPC assessment?
You do not need to deep-clean your property specifically for an EPC assessment. The important point is to make relevant areas and equipment accessible to the assessor.
Do I need to make improvements before getting an EPC?
No. An EPC assessment evaluates the property’s existing characteristics. You can review the recommendations afterwards and decide which improvements, if any, are appropriate.
Should I find my existing EPC before booking another one?
Yes. It is sensible to check the official EPC register first. If your existing EPC is still valid, you may not need a new certificate.
How long is an EPC valid?
An EPC is generally valid for 10 years. You should check the current certificate and its expiry date rather than assuming that a new assessment is required.
Can I arrange an EPC and property photography together?
Yes. Urgent EPC provides EPC assessments, property photography and floor plans. Combining services can be convenient when preparing a property for sale or rental marketing.
Can I get a Same Day EPC in London?
Same Day EPC appointments may be available depending on location, appointment capacity and other requirements. Check current availability when booking.
Final Checklist
Preparing for an EPC assessment is mainly about having the right information available and making the property accessible.
Start by checking whether you already have a valid EPC. Then prepare access to heating systems, windows, insulation areas and other relevant features. Keep documentation for recent improvements available where possible.
If you are selling or renting, think beyond the EPC as well. Professional property photography and a clear floor plan can help complete your property marketing materials.
For London property owners working to a deadline, arranging these services together can make the preparation process easier.
Book an EPC assessment with Urgent EPC or explore the available EPC, photography and floor plan services.
Authoritative Sources
For official information, refer to:
These government sources provide official information about EPC requirements and checking existing certificates.
