The change, effective immediately, will enable the Society to help first-time buyers across England and Wales achieve their goal of getting on the property ladder.
Dan Goulding, Product Development Manager, said: "The expansion of our lending area allows a wider range of customers from across England and Wales access to our competitive product range.
"The Society is always looking at ways to build on its strong foundations, and to grow as a mutual building society. We have exciting plans to further enhance the business for the benefit of our members and this is definitely a step in that direction."