The UK property market is changing — and not just in terms of house prices. A growing number of lenders are now offering a new type of home loan designed to reward energy efficiency: the green mortgage. But what exactly is it, who qualifies, and is it right for you?

What Is a Green Mortgage?

A green mortgage (sometimes called an eco-mortgage or energy-efficient mortgage) is a home loan that offers preferential terms — typically a lower interest rate or cashback — to buyers purchasing or re-mortgaging an energy-efficient property.

The idea is straightforward: properties that consume less energy are considered a lower financial risk by lenders. They're cheaper to run, which means homeowners have more disposable income and are less likely to default on repayments. Lenders pass some of that reduced risk back to borrowers in the form of better rates.

How Does It Work?

Most green mortgage products in the UK are tied to a property's Energy Performance Certificate (EPC) rating. To qualify, your home typically needs to hold an EPC rating of A or B, though some lenders accept a C rating depending on the product.

When you apply, your lender will ask to see the EPC for the property. If it meets the threshold, you may be eligible for:

• Lower interest rates — often 0.1% to 0.5% below the lender's standard equivalent
• Cashback on completion, sometimes up to £1,000
• Higher loan-to-value ratios in some cases
• Additional borrowing to fund energy-efficiency improvements

Some lenders also offer "improvement mortgages" variants — products that allow you to borrow extra funds to upgrade your home's energy efficiency (such as installing solar panels, a heat pump, or improved insulation) and then switch to a green rate once the improvements are made and verified.

Which Lenders Offer Green Mortgages?

Green mortgage products are now offered by a wide range of high street and specialist lenders, including Barclays, NatWest, Halifax, Nationwide, Santander, and a number of building societies. The market has grown significantly in recent years, with more products and more competitive rates arriving regularly.

As an independent mortgage broker, Inform Mortgages has access to the full range of green mortgage products across the market — not just those offered by a single bank — which means we can find the most competitive option for your circumstances.

Why Are Green Mortgages Growing in Popularity?

Several factors are driving the growth of green mortgages:

Government targets. The UK government has committed to reaching net zero by 2050, and improving the energy efficiency of the existing housing stock is central to that goal. Lenders are increasingly aligning their products with these ambitions.

Running cost savings. Energy-efficient homes cost significantly less to heat and power. With energy bills still a major concern for many households, a property rated A or B is an increasingly attractive purchase.

Future-proofing. There has been ongoing discussion about minimum EPC requirements for rental properties and potentially for mortgaged homes in the future. Buying an energy-efficient home now means staying ahead of any regulatory changes.

Consumer demand. Buyers — particularly younger buyers — are increasingly focused on sustainability. A green mortgage aligns with these values while also delivering tangible financial benefits.

What If My Home Isn't Energy Efficient Enough?

Don't worry if your current property — or the one you're looking to buy — doesn't yet meet the EPC threshold. There are options.

Some lenders offer "green further advance" products, which let you borrow additional funds specifically to make energy improvements. Once those improvements are verified through a new EPC assessment, you may be able to move onto a green rate.

Improvements that can boost an EPC rating include:

• Loft and wall insulation
• Double or triple glazing
• Solar panels
• Air source or ground source heat pumps
• Smart heating controls
• LED lighting upgrades

It's also worth checking your existing EPC — many homeowners are surprised to find their rating is higher than they thought, particularly if improvements have been made since the last assessment.

Is a Green Mortgage Right for You?

As with any mortgage product, the right choice depends on your individual circumstances. A green mortgage won't always offer the best overall rate in the market, so it's important to compare the full cost of any product — including fees, incentives, and the interest rate — rather than assuming a green label automatically means the best deal.

That's where having an independent broker makes a real difference. At Inform Mortgages, we compare green mortgage products alongside the full market to ensure you're getting the best possible outcome — both financially and in terms of sustainability goals.

Ready to explore your green mortgage options? Get in touch with the team at Inform Mortgages today for a no-obligation conversation about what's available for your situation.

Inform Mortgages is an independent mortgage broker. Your home may be repossessed if you do not keep up repayments on your mortgage.