The building society, which was one of the first lenders to reintroduce a 95% facility after the credit crunch, aims to help first-time buyers and customers returning to the housing market.
While the product is limited to buyers in the three counties, The Mansfield is also encouraging broker business in the area.
Mike Taylor, sales and marketing manager at The Mansfield, said: “As a local lender we value all of our customers, whether they come to us directly or through our partnership with intermediaries in England and Wales.
“Being a lender that prices its products exactly the same for broker business as for the direct channel, we are keen to hear from brokers with clients looking for 95% mortgages within our catchment area.
“While we are a national lender, we are proud to be a society, which lives and breathes our support for local borrowers and savers.”