Nationwide is doubling the number of mortgage customers who will be able to benefit from its interest-free green loans.
The 0% green additional borrowing products were initially launched in June 2023 with the aim of supporting 5,000 households with a Nationwide mortgage to improve the energy efficiency of their homes. Nationwide is now committing to doubling that amount - meaning that 10,000 households will be able to benefit from interest-free loans to fund energy-efficient home improvements.
Nationwide mortgage customers can borrow between £5,000 and £20,000 up to a maximum of 90% LTV across a two or five-year term. Customers can apply for the additional borrowing as soon as their first mortgage payment has been taken.
Since launch, Nationwide has lent around £60 million to customers, with an average loan size of around £13,000. The installation of solar panels and insulation, as well as new windows, are the most popular energy-efficient improvements customers have used loans for.
The South West has seen the highest take up, accounting for 16% of all green additional borrowing completions, followed by the Outer Metropolitan and Outer South East regions (both at 12%).
The move to support more customers comes as housing continues to be one of the main contributors to greenhouse gas emissions in the UK. And while the energy efficiency of the UK’s residential housing stock has been improving, a fifth of emissions in England come from residential buildings.
According to a recent report by Nationwide and WPI Economics, improving the EPC rating of all residential buildings to band C or higher could bring down total emissions from residential housing in England by up to 47%.
Nationwide is also a member of the Green Home Finance Strategic Partnership, an initiative between the government and the Green Finance Institute that was announced as part of the Warm Homes Plan. The partnership brings together financial services providers, the energy sector and consumer groups to ensure green home finance is available for the mass market, helping people to retrofit their homes.
Alongside the 0% green additional borrowing, Nationwide offers Green Reward, which is aimed at encouraging people to consider buying greener homes, with more cashback available to those purchasing the most energy-efficient properties.
Since its launch, Nationwide has given around £4.8 million in cashback, with more than £1.7 million of that given to customers in the 12 months between February 2025 and January 2026.
Nationwide also offers customers a Home Energy Efficiency Tool, which is supported by the Energy Savings Trust. It outlines cost, energy or carbon savings that can be made over the long term and potential home improvements that can be made based on a customer’s individual budget.
Henry Jordan, Nationwide’s group director of mortgages, said: “We are committed to helping our members improve the energy efficiency of their homes. Extending our 0% green additional borrowing products will help another five thousand households who want to retrofit their home and can afford long-term investment but struggle to meet the upfront costs. However, more is needed and collaboration is crucial if we are to decarbonise the UK’s housing stock. We are, therefore, delighted to be part of the Green Home Finance Strategic partnership, which will play a leading role in helping to unlock the changes needed to make our homes resilient for the future.”
