Improve EPC Before Remortgaging

If you’re approaching the end of your current mortgage deal, you may be wondering whether improving your home’s Energy Performance Certificate (EPC) before remortgaging is worth the investment.

The answer depends on your circumstances. Improving your EPC may be worth considering if the work makes financial sense for your home, could help you qualify for a suitable green mortgage product or improves your property’s energy efficiency for the long term. However, there is no guarantee that a better EPC will reduce your mortgage rate, increase your property’s valuation or be necessary to remortgage.

The best approach is to understand your current EPC rating, compare your mortgage options and speak to a mortgage adviser before committing to significant improvement work.

What Is an EPC and Why Might a Lender Consider It?

An Energy Performance Certificate, commonly known as an EPC, measures the energy efficiency of a property. Every certificate gives the home a rating from A to G, with A being the most energy efficient.

An EPC also includes recommendations that may improve the property’s rating. These might include upgrading insulation, replacing an older heating system, improving heating controls or installing renewable technology where appropriate.

It is important to remember that an EPC is based on standard assumptions about how a property performs rather than the way an individual household actually uses energy. For that reason, it should be viewed as a useful guide rather than a prediction of future energy bills.

For most homeowners, an EPC becomes relevant when buying, selling or letting a property. Some mortgage lenders may also consider the rating when assessing eligibility for certain green mortgage products or incentives.

That does not mean every lender places the same importance on an EPC. For many standard residential remortgages, affordability, loan-to-value, income and credit history remain the primary considerations.

If you are unsure how lenders assess affordability alongside factors such as your property and borrowing, our guide to mortgage affordability questions explains the process in more detail.

Does An EPC Affect A Remortgage?

For most homeowners, having a lower EPC rating will not prevent you from remortgaging.

Lenders continue to base the majority of their lending decisions on factors such as:

• Your income
• Your affordability
• Your loan-to-value ratio
• Your credit history
• The property’s suitability as security for the loan

An EPC is usually only one part of a much wider picture.

Where it can become more relevant is if you are interested in a green mortgage or another product designed to encourage energy-efficient homes. Some lenders offer products for properties that already meet a particular EPC standard, while others may support borrowers who intend to improve their property’s energy performance.

The products available, the qualifying criteria and any incentives offered vary between lenders and change over time. A green mortgage should never be assumed to be the cheapest option simply because it carries a green label.

That is why it is usually worth comparing the whole market before deciding whether improving your EPC should form part of your remortgage plans.

What Is A Green Remortgage?

A green remortgage is a mortgage product that is designed to support energy-efficient homes or improvements that increase a property’s energy performance.

Different lenders take different approaches.

Some may offer products for homes that already have a higher EPC rating. Others may provide incentives where borrowers intend to carry out qualifying energy-efficiency improvements after completion.

Those incentives can vary and may include features such as cashback, preferential pricing or additional borrowing options, although every lender sets its own criteria and these products change regularly.

This is where careful comparison becomes important.

A mortgage with a green incentive may appear attractive, but the overall cost of borrowing still matters. Arrangement fees, interest rates, flexibility, early repayment charges and your long-term plans should all be considered alongside any energy-related benefits.

If your fixed rate is ending soon, speaking to an adviser before arranging improvement work can help you understand whether a green product is likely to be relevant to your circumstances or whether another remortgage option could represent better value overall.

Which Improvements Can Raise An EPC Rating?

There is no single improvement that guarantees a higher EPC rating. Every property is different, and the impact of any work depends on the building’s age, construction and existing level of energy efficiency.

Your current EPC is usually the best place to start because it includes recommendations that are specific to your property.

Depending on the home, improvements may include:

• Increasing loft or cavity wall insulation
• Upgrading heating controls
• Replacing older glazing where appropriate
• Reducing draughts
• Installing low-carbon heating systems
• Fitting solar panels where suitable

Some homes may benefit from relatively modest improvements, while others may require much larger investment before the EPC rating changes significantly.

Before committing to expensive work, it is sensible to obtain professional advice on the improvements themselves rather than relying solely on generic recommendations.

Installation quality, planning requirements, warranties and expected lifespan should all form part of the decision.

The Government also provides guidance on improving your home’s energy efficiency, which can help explain the types of improvements available and how they may apply to different properties in England and Wales.

Could A Better EPC Affect Valuation?

This is one of the most common questions homeowners ask before remortgaging.

The honest answer is that no one can promise a better EPC will increase your property’s valuation.

Mortgage valuations consider many factors, including location, property type, size, condition, comparable local sales and the wider housing market. Energy efficiency may contribute to a property’s overall appeal, particularly as buyers become more aware of running costs, but it is rarely considered in isolation.

Research has suggested there may be an association between stronger EPC ratings and higher property values in some parts of the market. That should not be interpreted as a guarantee that carrying out improvements will automatically increase your home’s value or the figure a lender places on it.

For many homeowners, the stronger reasons for improving energy efficiency are lower running costs, greater comfort and preparing the property for future ownership, rather than expecting an immediate increase in valuation.

Costs, Savings & Payback

Before improving your EPC purely to support a remortgage, it is worth stepping back and looking at the wider financial picture.

Some energy-efficiency improvements can reduce running costs and make a home more comfortable throughout the year. Others involve a significant upfront investment that may take many years to recover through lower energy bills alone.

That is why the decision should not be based solely on the possibility of qualifying for a green mortgage.

Ask yourself:

• How much will the work cost?
• How long are you planning to stay in the property?
• Are the improvements likely to reduce your energy use in a meaningful way?
• Will you need to borrow money to pay for the work?
• Could borrowing over a longer mortgage term mean paying more interest overall?

For example, borrowing £10,000 through your mortgage may reduce the immediate financial pressure of paying for improvements, but because mortgage borrowing is spread over many years, the total amount repaid could be considerably higher than the original cost unless you overpay or repay the borrowing sooner.

You can also use our mortgage calculator to get an illustrative idea of how different borrowing amounts could affect your repayments.

Looking beyond the mortgage itself often leads to a better decision than focusing only on a potential green product.

Ofgem also provides impartial advice on saving money on your energy bills, including practical ways to improve energy efficiency before committing to larger projects.

Should You Improve Before Or After Applying?

There is no single answer that suits every homeowner.

In some cases, completing improvements before remortgaging could make sense, particularly if the work is already planned, affordable and may help you meet the criteria for a suitable green mortgage product.

In other situations, it may be better to review your mortgage first.

For example, if your current deal is ending within the next few months, delaying your remortgage while waiting for building work, EPC reassessments and contractor availability could leave you moving onto your lender’s Standard Variable Rate, which may increase your monthly payments.

Some homeowners also choose to remortgage first before arranging improvements, particularly if additional borrowing is needed to help fund the work.

The right sequence depends on factors such as:

• When your current mortgage deal ends
• Whether early repayment charges apply
• How quickly the improvements can realistically be completed
• Whether a lender requires updated EPC evidence
• The products currently available

This is why it is often worth discussing your plans with a mortgage adviser before arranging major work. A conversation at an early stage may help you avoid unnecessary costs or delays.

If you are approaching the end of your mortgage deal and would like to understand your options, our guide explaining what happens at a mortgage adviser appointment outlines what to expect before you begin the remortgage process.

Ways To Finance Energy Improvements

If you decide that improving your home’s energy efficiency is the right move, there are several ways the work may be funded.

Some homeowners use savings, avoiding additional borrowing altogether.

Others may consider incorporating the cost into a remortgage through additional borrowing, where appropriate and subject to affordability and lender criteria.

Depending on your circumstances, the options could include:

• A full remortgage
• Additional borrowing with your existing lender
• A further advance
• Separate finance for the improvement work

Each option has advantages and disadvantages.

Borrowing through your mortgage may spread the cost over a longer period and reduce monthly repayments compared with shorter-term borrowing. At the same time, extending borrowing over many years can increase the total amount repaid through interest.

The most suitable approach depends on your finances, the cost of the improvements and your longer-term plans for the property.

A Simple Checklist Before You Decide

Before spending money purely to improve your EPC ahead of a remortgage, it is worth working through a few practical questions.

• Check your current EPC rating and review the recommendations made for your property.
• Understand whether the improvements are worthwhile in their own right, rather than relying on potential mortgage incentives.
• Compare the total cost of the work against realistic energy savings and how long you expect to stay in the property.
• Find out whether your chosen lender requires updated EPC evidence or a new certificate after the work has been completed.
• Check whether early repayment charges apply if you intend to remortgage before your current deal ends.
• Consider how additional borrowing could affect your loan-to-value and overall affordability.
• Obtain quotations from reputable installers and understand whether planning permission or building regulations approval may be required.
• Speak to a mortgage adviser before committing to significant expenditure based on assumed lender criteria.

Taking these steps can help ensure your decision is based on accurate information rather than assumptions.

How Key Mortgage Advice Can Help

Every homeowner’s circumstances are different.

Some people are looking for the lowest monthly payment. Others are planning renovation work, while some simply want to understand whether improving their EPC is likely to make any difference before their current deal ends.

At Key Mortgage Advice, we help homeowners compare the wider picture rather than focusing on one feature of a mortgage product.

That means looking at affordability, loan-to-value, fees, flexibility, lender criteria and your longer-term plans before recommending the most suitable route forward.

Whether you are considering a standard remortgage, exploring green mortgage products or thinking about borrowing to improve your home’s energy efficiency, we can help you understand the options available without assuming one approach will suit everyone.

If you are approaching the end of your current mortgage deal, our remortgage brokers can review your circumstances and compare available products across the market.

You can also explore our wider mortgage advice if you would like to understand the different options before making a decision.

Improve EPC Before Remortgaging FAQs

Should I improve my EPC before remortgaging?

It depends on your circumstances. Improvements may be worthwhile if they make financial sense for your home or could help you qualify for a suitable green mortgage product. They are not automatically necessary before remortgaging.

Does an EPC rating affect a remortgage application?

A lower EPC rating does not usually prevent you from remortgaging. Some lenders may consider EPC ratings for certain green mortgage products, but affordability, credit history and loan-to-value remain key factors.

Can a better EPC help me get a lower mortgage rate?

Possibly, but not automatically. Some lenders offer green mortgage products linked to energy-efficient homes, although eligibility and pricing vary. A green mortgage is not always the cheapest option available.

What EPC rating do I need for a green mortgage?

There is no universal minimum rating. Different lenders have different criteria, and some products are available for existing energy-efficient homes while others support planned improvements.

Do I need a new EPC to remortgage?

Not always. Some remortgages do not require a new EPC, while some lenders or green mortgage products may ask for valid or updated EPC evidence. It is worth checking the lender’s requirements before arranging improvements.

How long is an EPC valid for?

An EPC is generally valid for 10 years unless a newer certificate is issued.

Which improvements can raise an EPC rating?

Recommendations vary between properties but may include insulation, improved heating controls, replacing older heating systems, reducing draughts, upgrading glazing or installing renewable technologies where appropriate.

Will improving my EPC increase my property value?

There is no guarantee. Energy efficiency may improve a property’s appeal to some buyers, but lenders’ valuations take many factors into account, including location, condition and the wider housing market.

Can I borrow more on my mortgage for energy improvements?

In some cases, yes. Subject to affordability and lender criteria, additional borrowing or a remortgage may help fund eligible home improvements.

Should I complete the work before or after remortgaging?

That depends on your circumstances. If your current mortgage deal is ending soon, it may be worth reviewing your mortgage options before delaying an application for improvement work.

Are green mortgages always cheaper than standard mortgages?

No. Green mortgage products may include useful incentives, but they are not automatically the lowest-cost option overall.

Can landlords remortgage a property with a low EPC rating?

Possibly, although landlords should also consider the separate minimum energy efficiency requirements that can apply to buy-to-let properties in England and Wales. These rules are different from the criteria used for owner-occupied residential mortgages and should be checked before making decisions.