Features and benefits

  • There is a choice of either a 2 or a 5 year fixed rate product at a discounted initial interest rate compared to our standard additional borrowing product range.

  • There are no product fees with this mortgage.

  • You can borrow between £5,000 - £25,000, dependent on your individual circumstances.

  • You can borrow up to 85% Loan to Value.

At the end of the deal period you move to our variable Standard Mortgage Rate (SMR) for the remainder of the mortgage term. Alternatively, you may switch to another Nationwide product, subject to availability and your eligibility at the time. The SMR has no upper limit or cap and is only available to existing members who have reached the end of their deal period.

To apply for a Green Additional Borrowing mortgage:

  • You need to be an existing member with a Nationwide mortgage.
  • You must spend at least 50% of your additional borrowing on energy efficient home improvements. Such as: solar panels, air source heat pump, cavity wall insulation, double glazing/replacement windows, electric car charging point, ground source heat pumps, loft insulation, small scale wind turbine, tanks and pipes insulation. Exclusions may apply.
  • The mortgage term of the additional borrowing cannot exceed the mortgage term of the existing main mortgage account.

Green Additional Borrowing Mortgage rates

Compare our Green Additional Borrowing Mortgage deals and see what your interest rate and monthly payments could be.

Going green – one home at a time

We think the move to a green society and a greener world should begin at home. And we’re doing our bit to help. Discover Nationwide’s commitment to going green, and how it could help you.

Find out more about going green

Ways to apply

Over the phone or video call

Call us to set up a meeting over the phone with one of our Mortgage Advisers. They will be able to talk you through your options and make recommendations based on your individual needs.

You have the option of a video call if you prefer to have a face-to-face meeting with our Mortgage Advisers.

For video call appointments, you’ll receive an email with details of what you’ll need and how to join the video call. 

Monday to Friday, 8am to 6pm.
Saturday 8:30am to 4pm.
Closed Sundays and bank holidays.


Think carefully before securing other debts against your home. Mortgages are secured on your home. You could lose your home if you do not keep up payments on your mortgage. Mortgages are subject to underwriting and criteria. Minimum age 18, UK residents only.