From 1956 ownership was transferred from the Mechanics Institute to the Louth Naturalists Antiquarian and Literary Society, locally known as the “Ants and Nats”.
During the second half of the twentieth century, the Mansion House was established as the Louth Public Reading Room and Library until the late 1980’s. It was subsequently used as a storage facility.
Andrew Leonard, a local businessman, secured a Lindsey Action Zone LEADER grant in 2018, to help with the sympathetic restoration and conversion of the building into a restaurant. This has secured future use and access to the Mansion House for the benefit of visitors to Louth and its residents, restoring its position as the place to be in the heart of the Louth.