"The reductions to our 95% fixed rate mortgage products will help those who have smaller deposits fulfil their homeownership ambitions."
Two and three-year shared ownership products have been reduced from 3.79% to 3.39%.
A five-year fixed rate is also available at 3.79%, down from 4.69%, up to 95% LTV.
All products have no application fees.
Roger Knight, lending manager at Newbury Building Society, commented: “As the shared ownership mortgage market grows, we are constantly looking for ways to enhance and develop our mortgage products in response to the needs of borrowers.
"We believe the reductions to our 95% fixed rate mortgage products will help those who have smaller deposits fulfil their homeownership ambitions.”