The society said that this increase aims to benefit first-time buyers looking to secure their own home.
Customers can borrow up to £350,000, up from the previous limit of £250,000.
West Brom BS has also cut its rates by up to 0.15% across the 95% LTV range.
For a two-year fixed rate product, rates have been cut from 2.99% to 2.84%, but for a five-year fix, they have been reduced to 3.44% from 3.59%, with £1,500 cashback.
The society has also added a three-year fixed rate to the range at 3.14%.
Richard Scott, the West Brom’s head of intermediaries, said: “We recognise the importance of helping the next generation of homeowners to secure their first property and have proven experience in providing a choice of good value mortgage products.
“These changes should help to broaden the West Brom’s reach in this particular market segment.”
