Its three-year fixed rates start from 3.14 per cent, while its five-year fixed rates start from 3.24 per cent.
Its two-year fixed rates will not be changing, standing at 2.99 per cent.
These products are available to landlords purchasing individually or via a limited company structure.
The specialist buy to let range is available on houses in multiple occupation (HMO) and multi-unit properties.
Keystone Property Finance CEO, David Whittaker (pictured), said: “I am confident these new rates will be popular with brokers when faced with complex buy to let enquiries in which Keystone specialises.
“We hope these new rates will help brokers looking to complete their clients deals in time for their summer break.
We’ve focused the rate reductions on three and five-year rates to help brokers offer their property investors the ability to lock into longer term fixed rates given current political uncertainty.”
Keystone’s cashback purchase-only product range is being withdrawn on 31 May 2019 after running since 4 March.