Keystone Property Finance

Keystone Property Finance was established as a specialist buy-to-let lending brand within the Nationwide Building Society group. While The Mortgage Works (TMW) handles standard buy-to-let lending for the group, Keystone was created to serve the more complex end of the BTL market — landlords with non-standard properties, larger portfolios, and cases that require bespoke underwriting.

Keystone focuses on areas such as HMO lending, multi-unit freehold blocks (MUFBs), portfolio landlord cases, and buy-to-let for limited company structures. The lender benefits from Nationwide's financial strength and funding stability, while maintaining the agility and specialist focus needed to serve professional landlords with complex requirements. Keystone's underwriting team has deep expertise in property investment structures and can assess cases that mainstream lenders would decline.

Keystone Property Finance operates exclusively through mortgage brokers and intermediaries. The lender has built strong relationships with the intermediary community by offering clear criteria, pragmatic underwriting, and competitive rates for specialist BTL products. Being part of the Nationwide group gives Keystone access to substantial funding and institutional stability that independent specialist lenders cannot always match.