EPC for Older Properties in London: What Owners Should Know

Older properties are a common part of the London housing market. Period houses, converted flats and properties built many decades ago can have very different construction features from modern homes.

If you own an older property, you may wonder whether its age makes it more difficult to obtain an Energy Performance Certificate (EPC), or whether older construction automatically means a poor EPC rating.

The answer depends on the individual property.

An EPC for older properties in London considers the property’s construction, heating, insulation, windows, lighting and other energy-related features. Understanding these factors can help homeowners and landlords prepare for an assessment and decide whether improvements are worthwhile.

Does an Older Property Need an EPC?

The age of a property does not automatically mean that it is exempt from EPC requirements.

If an EPC is required when selling or renting a property, the usual requirements still apply, subject to applicable exemptions.

GOV.UK states that an EPC is generally required when selling or renting a property and should be commissioned before the property is marketed where there is no valid certificate. An EPC is normally valid for 10 years.

Before booking a new assessment, check whether the property already has a valid EPC.

You can use the official GOV.UK Find an Energy Certificate service to search for an existing certificate.

Why Can Older Properties Be Different?

Older London properties may have been built using construction methods and materials that differ from those used in newer homes.

For example, a period property may have:

• Solid walls

• Older roof construction

• Single-glazed windows

• Older heating systems

• Traditional floors

• Older hot water systems

• Limited insulation

• Extensions built at different times

This does not mean that every older property will have a low EPC rating.

The final assessment depends on the actual characteristics recorded for the property.

Government guidance also recognises that existing buildings can require a survey to collect information that is not readily available from modern building records.

What Does an EPC Assessor Look At?

An EPC assessment considers various features that can affect the property’s energy performance.

These can include:

Heating

The heating system can be an important part of the assessment.

The assessor may need information about the type of heating system, boiler and heating controls.

If the property has recently had a heating upgrade, having relevant information available can be useful.

Insulation

Insulation can affect how efficiently a property retains heat.

Older properties may have different insulation arrangements from newer homes.

The relevant areas can include:

• Loft insulation

• Roof insulation

• Wall insulation

• Floor insulation

• Hot water cylinder insulation

However, you should not assume that adding insulation is automatically appropriate for every older building.

The construction and condition of the property should be considered before major work is carried out.

Windows and Glazing

Windows can also form part of the information considered during an EPC assessment.

An older property may still have single glazing, while others may have replacement double glazing or secondary glazing.

If windows have been replaced, keep relevant documentation where possible.

Lighting

The type and efficiency of lighting can also contribute to the assessment.

Replacing inefficient lighting may be a relatively straightforward improvement, although the potential effect on the overall EPC rating will depend on the property.

Hot Water

Hot water systems and associated insulation can also be considered.

If your property has a cylinder, boiler or other hot water equipment, make sure the assessor can access the relevant areas where necessary.

Does an Older Property Automatically Get a Low EPC Rating?

No.

Property age alone does not determine the EPC rating.

An older property may have been upgraded over the years with better insulation, efficient heating, improved windows and other energy-efficiency measures.

At the same time, a relatively modern property can still receive a lower rating if it has inefficient systems or limited energy-efficiency features.

The EPC uses information about the individual building rather than simply assigning a rating based on its age.

Office for National Statistics data has shown that property age is associated with differences in energy efficiency across England and Wales, but individual properties can vary considerably.

What If Your Older Property Has a Low EPC Rating?

If your EPC rating is lower than expected, start by reading the recommendation report.

The report identifies potential energy-efficiency improvements for the property.

Possible recommendations may involve:

• Improving insulation

• Upgrading heating controls

• Improving heating efficiency

• Improving glazing

• Upgrading lighting

• Improving hot water insulation

• Considering renewable technologies

Not every recommendation will be suitable for every property.

This is particularly important with older buildings, where construction methods and the condition of the building need to be considered before major improvements are made.

You can also read our guide on how to improve your EPC rating before selling or letting for more information.

Should You Improve an Older Property Before Selling?

Not necessarily.

If you are preparing an older London property for sale, first check your existing EPC.

If the certificate is still valid, you may not need a new assessment simply because you are selling.

If you are considering improvements, review the EPC recommendations before spending money on major work.

Think about:

• The cost of the improvement

• The property’s condition

• The potential energy-efficiency benefit

• Your plans for the property

• Whether you are selling or keeping the property

• Whether professional advice is needed

An improvement that makes sense for a long-term homeowner may not necessarily make financial sense immediately before a sale.

For additional selling guidance, read EPC Before Selling a House in London: What Sellers Should Know.

What About Older Rental Properties?

Landlords should pay particular attention to the EPC requirements that apply to privately rented properties.

For covered domestic private rented properties, the current minimum standard is generally EPC Band E unless a valid exemption applies.

Because rental-property requirements can change, landlords should check the latest government guidance before making decisions about improvements or letting a property.

If you are preparing an older rental property, you can also read our EPC checklist for landlords before marketing the property.

Do Period Properties Have Special EPC Rules?

Some buildings with special architectural or historical characteristics may fall within specific EPC exemptions, depending on their circumstances.

However, you should not assume that a property is exempt simply because it is old or described as a period property.

The official government guidance lists circumstances where an EPC may not be required, including certain protected buildings where meeting minimum energy performance requirements would unacceptably alter their character or appearance.

If you believe your property may qualify for an exemption, check the current official guidance and obtain appropriate professional advice where necessary.

Should You Make Improvements Before the EPC Assessment?

It can be tempting to make changes immediately before an assessment if you want a better rating.

However, it is usually sensible to understand the existing property first.

If you already have an EPC, review its recommendations.

If you do not have a valid EPC, arrange an assessment with an accredited assessor.

GOV.UK advises property owners to use an accredited assessor when obtaining a new energy certificate.

Once you understand the property’s current position, you can decide which improvements are practical.

Preparing an Older London Property for an EPC

Before the assessor arrives, gather information about improvements that have already been made.

Useful information may include:

• Boiler installation details

• Heating system information

• Window replacement details

• Insulation information

• Solar panel documentation

• Hot water system information

• Other relevant energy-efficiency improvements

You should also make sure the relevant parts of the property can be accessed during the assessment.

Our guide on how to prepare for an EPC assessment in London provides more preparation tips.

What If You Cannot Find the Old EPC?

Do not automatically assume that you need to arrange a new certificate.

First, search the official government EPC register.

You can search by postcode, street name and town, or certificate number.

If there is no valid certificate, you may need to arrange a new assessment.

GOV.UK confirms that if a property does not have an energy certificate or the certificate has expired, you can arrange a new assessment with an accredited assessor.

Final Thoughts

An older London property does not automatically have a poor EPC rating.

The important thing is to understand the property’s actual construction, heating, insulation, glazing and other energy-related features.

If you are selling or renting an older property, start by checking whether a valid EPC already exists.

Then review the certificate and recommendations before deciding whether improvements are worthwhile.

For period or unusual properties, take extra care before carrying out major building work. The most appropriate energy-efficiency solution can depend on the construction and condition of the building.

For the latest EPC requirements and exemptions, always check the official GOV.UK guidance.

If you need an EPC assessment for an older property in London, you can arrange an assessment with EPC Rate London.