Warm Homes Loan Scheme (WHLS)

Government-Backed, Low-Interest Loans for Home Energy Efficiency Improvements

The Warm Homes Loan Scheme (WHLS) is a UK Government-backed initiative designed to help homeowners access affordable finance for energy-saving improvements, including solar panels, battery storage and low-carbon heating systems.

Introduced as part of the government’s wider Warm Homes Plan, the scheme provides access to interest-free and low-interest loans through participating lenders, helping households spread the upfront cost of energy efficiency improvements over an extended period.

By making clean energy technologies more financially accessible, the Warm Homes Loan Scheme aims to reduce household energy bills, improve energy efficiency and support the transition towards warmer, more sustainable homes.

At Energy Advice Portal, a Fairway Energy service, we provide free, impartial energy advice to help residents understand the Warm Homes Loan Scheme, explore available funding options and make informed decisions about improving their home’s energy performance.

Introduction to the Warm Homes Loan Scheme

The Warm Homes Loan Scheme is part of the UK Government’s wider strategy to improve the energy efficiency of homes, reduce household energy expenditure and encourage the adoption of renewable and low-carbon technologies.

Many homeowners would benefit from installing solar panels, battery storage or more efficient heating systems but face significant upfront installation costs.

The Warm Homes Loan Scheme aims to address this financial barrier by making affordable borrowing available through participating banks, credit unions and specialist lenders.

Unlike government grant schemes, which provide funding that generally does not need to be repaid, the Warm Homes Loan Scheme offers finance that households repay over an agreed period.

Government support helps participating lenders offer more competitive interest rates, making energy efficiency improvements more accessible to homeowners who may otherwise struggle to finance the initial investment.

The scheme is available across England, Scotland, Wales and Northern Ireland, subject to eligibility and individual lender requirements.

Key Points

• Government-Backed Finance: Supported by the UK Government to help reduce borrowing costs for eligible home energy improvements.
• Low and Zero-Interest Loans: Participating lenders offer interest-free or reduced-interest finance products.
• UK-Wide Availability: Available to eligible property owners across England, Scotland, Wales and Northern Ireland.
• Energy Efficiency Improvements: Funding can support solar panels, battery storage, heat pumps and other approved technologies.
• Flexible Repayment Options: Loan terms vary by lender, with some products offering extended repayment periods.
• No Universal Income Threshold: Eligibility is primarily determined by property ownership and individual lender affordability requirements.
• Potential Energy Bill Savings: Eligible improvements may help reduce household energy consumption and ongoing energy costs.
• Combination with Grants: Certain government grants may be used alongside Warm Homes loans, provided the same improvement is not funded twice.

Eligibility for the Warm Homes Loan Scheme

Eligibility depends on property ownership, the type of improvement being financed and the participating lender’s individual lending criteria.

Property Ownership

To qualify for a Warm Homes loan, applicants must own the property they wish to improve.

The property must:

• Be located within the United Kingdom.
• Be a residential property rather than a commercial building.
• Be owned by the applicant, either outright or with an existing mortgage.

Individual lenders may apply additional requirements depending on their financial products.

Household Income and Financial Circumstances

Unlike some government energy grant schemes, the Warm Homes Loan Scheme does not have a universal household income threshold.

Instead, participating lenders assess applicants based on their financial circumstances, credit history and ability to meet the proposed repayments.

Applicants may be required to provide evidence of income, existing financial commitments and other information relevant to the lending decision.

Approval is not guaranteed, and individual lenders retain responsibility for determining whether an applicant qualifies.

Property Energy Efficiency

The scheme supports eligible home energy improvements, but properties do not necessarily need to have a poor Energy Performance Certificate (EPC) rating to qualify.

The suitability of improvements depends on the property’s characteristics, existing heating arrangements and the technical requirements of the proposed installation.

Credit and Affordability Assessments

As the scheme provides repayable finance, applicants must satisfy the lender’s credit and affordability requirements.

Before applying, households should consider whether the proposed monthly repayments are affordable alongside their existing household expenditure.

What Improvements Are Available?

The Warm Homes Loan Scheme supports a range of renewable energy and low-carbon heating technologies designed to improve household energy performance.

Solar Photovoltaic (PV) Panels

Solar panels generate electricity from sunlight, helping households reduce the amount of electricity purchased from their energy supplier.

Depending on household consumption and system performance, solar installations may help reduce electricity bills and reliance on grid-supplied energy.

Government-backed loans of up to £15,000 may be available for eligible solar panel installations.

Battery Storage Systems

Home battery systems store electricity for use when it is needed.

When combined with solar panels, batteries can help households use more of the electricity generated by their own system.

Some households may also benefit from charging batteries during cheaper electricity tariff periods.

Loans of up to £15,000 may be available for eligible electrical battery storage systems.

Air Source Heat Pumps

Air source heat pumps extract heat from the outside air and use it to provide heating and, depending on the system, hot water.

They can offer an efficient alternative to traditional fossil-fuel heating systems.

The scheme supports eligible air source heat pump installations, with maximum loan amounts depending on the technology.

Air-to-water heat pumps may qualify for loans of up to £20,000.

Ground Source Heat Pumps

Ground source heat pumps extract heat from the ground to provide heating and hot water.

These systems can offer efficient, low-carbon heating but may involve higher installation costs due to the groundworks required.

Eligible ground source heat pump installations may qualify for loans of up to £35,000.

Other Eligible Technologies

Depending on the scheme rules and participating lender arrangements, additional supported technologies may include:

• Air-to-air heat pumps are eligible for loans of up to £10,000 when the required Microgeneration Certification Scheme (MCS) certification is available
• Eligible biomass heating systems.
• Heat network connections.
• Domestic wind turbines.
• Micro-hydroelectric generation systems.

Not every lender will offer finance for every technology, and funding limits vary according to the improvement being installed.

How Much Funding Is Available?

The maximum loan amount depends on the technology being financed.

Energy Improvement	Maximum Supported Loan
Solar PV Panels	£15,000
Electrical Battery Storage	£15,000
Air-to-Water Heat Pumps	£20,000
Air-to-Air Heat Pumps	£10,000
Ground Source Heat Pumps	£35,000
Biomass Boilers	£20,000
Heat Network Connections	£7,500
Eligible Micro-Renewable Systems	£20,000

These figures represent maximum supported loan amounts for individual technologies, rather than guaranteed borrowing limits.

The amount available to an applicant will depend on the lender, installation costs, eligibility and affordability assessments.

How Does the Warm Homes Loan Scheme Work?

The scheme provides government-supported finance through participating lenders rather than direct loans from the government.

1. Identify Suitable Home Improvements

Homeowners should first consider which energy efficiency improvements may be appropriate for their property.

This could include solar panels, battery storage or replacing an existing heating system with a low-carbon alternative.

Independent energy advice can help households understand the potential benefits and limitations of different technologies.

2. Obtain Installation Information and Quotations

Applicants should obtain information about the proposed improvements, including installation costs, technical suitability and potential energy savings.

Where appropriate, quotations should be obtained from qualified installers.

3. Compare Available Loan Products

Participating lenders offer different finance products, interest rates and repayment terms.

Households should compare the total cost of borrowing, monthly repayments, loan duration and any applicable fees before making a decision.

4. Submit a Loan Application

Applications are made through participating lenders, which may include banks, credit unions, specialist finance providers or finance arrangements offered through installers.

Applicants do not apply directly to the government.

5. Credit and Affordability Assessment

The lender assesses the applicant’s financial circumstances and determines whether the proposed loan is affordable.

Approval remains subject to the lender’s eligibility and lending criteria.

6. Installation of Approved Improvements

Once finance has been approved and the necessary arrangements are in place, the energy efficiency improvements can be installed.

Most supported technologies must be installed by businesses certified under the Microgeneration Certification Scheme (MCS).

7. Loan Repayments

Following installation, the borrower repays the loan according to the agreed finance arrangement.

Repayment amounts, interest rates and loan terms depend on the individual lender and product selected.

What Are the Benefits of the Warm Homes Loan Scheme?

The scheme offers several potential benefits for homeowners looking to improve their property’s energy efficiency.

Reduced Upfront Costs

One of the main advantages is the ability to spread the cost of eligible improvements over time rather than paying the full installation cost upfront.

Lower Energy Bills

Solar panels, battery storage and efficient heating systems may help reduce household energy expenditure.

Actual savings depend on the technology installed, household energy consumption, energy tariffs and other factors.

Improved Household Comfort

More efficient heating technologies can help households maintain comfortable indoor temperatures while reducing unnecessary energy consumption.

Greater Energy Independence

Generating and storing electricity at home can reduce reliance on electricity purchased from the grid.

Reduced Carbon Emissions

Renewable energy generation and low-carbon heating technologies can help households reduce emissions associated with their energy use.

Access to More Affordable Finance

Government support allows participating lenders to offer reduced-interest or interest-free finance products, potentially lowering borrowing costs compared with standard lending arrangements.

Can the Warm Homes Loan Scheme Be Combined with Other Grants?

In some circumstances, homeowners may be able to combine a Warm Homes loan with other government energy efficiency funding.

This may include:

Boiler Upgrade Scheme

Eligible households in England and Wales may be able to access grant funding towards the installation of qualifying low-carbon heating systems.

A Warm Homes loan may potentially be used to finance eligible costs not covered by the grant.

Home Energy Scotland

Eligible households in Scotland may be able to combine certain Home Energy Scotland grants with Warm Homes loan finance, subject to the relevant programme requirements.

However, households cannot use a Warm Homes loan and another source of government funding to pay for the same improvement.

Applicants should check the relevant scheme rules before proceeding.

Warm Homes Loan Scheme vs Warm Homes: Local Grant

Although both programmes form part of the government’s wider approach to improving home energy efficiency, they provide different types of assistance.

Warm Homes Loan Scheme

The Warm Homes Loan Scheme provides repayable finance to help eligible property owners cover the cost of approved energy improvements.

It is primarily intended for households able to meet loan repayments but seeking more affordable finance.

Warm Homes: Local Grant

The Warm Homes: Local Grant provides government-funded energy efficiency improvements to eligible lower-income households in England.

Qualifying owner-occupiers may receive fully funded improvements without needing to repay the cost.

For households experiencing fuel poverty or financial hardship, exploring available grant funding before taking out a loan may be particularly beneficial.

Supporting Financial Wellbeing and Informed Decisions

At Energy Advice Portal, we recognise that improving home energy efficiency can involve important financial decisions.

Although low-interest loans can make energy improvements more accessible, borrowing money creates an ongoing financial commitment.

Households should carefully consider the total amount repayable, potential energy savings and whether the monthly repayments are affordable.

For residents already struggling with energy bills or experiencing financial hardship, other forms of assistance may be more appropriate.

Our commitment is to provide free, impartial energy advice that helps households understand their options without unnecessary pressure.

We believe residents should have access to clear information about both the potential benefits and financial responsibilities associated with home energy improvements.

Challenges and Considerations

Before applying for a Warm Homes loan, homeowners should consider several important factors.

Repayment Commitments: Loans must be repaid, even where the improvements do not deliver the anticipated energy savings.

Interest Rates: Not all products are interest-free. Rates and borrowing costs vary between lenders.

Credit Eligibility: Applicants must satisfy the lender’s credit and affordability requirements.

Installation Costs: The maximum available loan may not cover every cost associated with a particular installation.

Technology Suitability: Not every property is suitable for every renewable energy or low-carbon heating technology.

Energy Savings: Actual savings depend on installation performance, household behaviour, energy prices and tariffs.

Loan Terms: Longer repayment periods may reduce monthly payments but can increase the total amount of interest paid.

Residents should review all finance documentation carefully and seek independent financial guidance where appropriate.

The Wider Impact of the Warm Homes Loan Scheme

The Warm Homes Loan Scheme forms part of the UK’s wider efforts to improve domestic energy efficiency, encourage renewable energy generation and reduce reliance on fossil fuels.

By making low-carbon technologies more accessible, the programme aims to support the transition towards more sustainable homes.

Potential wider benefits include reduced household energy consumption, lower carbon emissions and increased investment in energy efficiency improvements.

However, affordable borrowing is not a substitute for targeted financial assistance for households experiencing fuel poverty.

For vulnerable residents and those on lower incomes, grant-funded improvements and other support schemes may provide more appropriate solutions.

Ensuring households understand the different forms of assistance available is therefore an important part of delivering accessible and responsible energy advice.

How Energy Advice Portal Can Help

At Energy Advice Portal, a Fairway Energy service, we understand that navigating government energy schemes and funding options can sometimes be confusing.

Our experienced advisors provide free, impartial guidance to help residents understand available energy efficiency programmes and make informed decisions about their household energy needs.

We can help you:

• Understand the Warm Homes Loan Scheme and its general eligibility requirements.
• Explore the types of home energy improvements supported by the scheme.
• Find information about available government grants and financial assistance.
• Understand the differences between repayable loans and grant-funded improvements.
• Identify practical opportunities to reduce household energy consumption.
• Access information about other relevant energy advice and support services.

Through our dedicated telephone helpline and home-visiting arrangements, where available and appropriate, we aim to make energy advice accessible to everyone.

Our advisors provide energy information and signposting rather than regulated financial advice. Loan applications, credit decisions and finance agreements are handled by participating lenders.

Conclusion

The Warm Homes Loan Scheme provides UK homeowners with an opportunity to access government-backed, low-interest and interest-free finance for eligible home energy improvements.

By helping households spread the upfront cost of solar panels, battery storage, heat pumps and other approved technologies, the scheme aims to make energy efficiency improvements more financially accessible.

However, borrowing should always be considered carefully, particularly where households are already experiencing financial pressures.

At Energy Advice Portal, we’re committed to helping residents understand their options, explore available grants and access reliable, impartial energy advice.

Our aim is to help households make informed decisions that support lower energy costs, improved comfort and more sustainable homes.

Find Out More About the Warm Homes Loan Scheme

Thinking about improving your home’s energy efficiency but unsure what financial assistance may be available?

Our friendly, experienced advisors can help you understand the Warm Homes Loan Scheme, explore available government grants and identify practical ways to manage your household energy costs.

Contact Energy Advice Portal today for free, impartial energy advice and support.

Warm Homes loans are provided by participating lenders and are subject to eligibility, credit assessments, affordability checks and individual lending terms. Energy Advice Portal provides general energy advice and information about available schemes. We do not guarantee loan approval, funding availability or energy bill savings.