By the mid-1980s, the Gas Board had moved out of the building and it lay empty for a number of years. It was scheduled for demolition in the early 1990s, when Crispin Kelly – a developer and one of Bernard’s sons – acquired the site and redeveloped it, transforming the main block of laboratories into 70 apartments and the ground floor into spaces for artists’ and photographers’ studios. The architects Lifschutz Davidson oversaw the project, retaining the building’s mid-century character, including the double height spaces and large windows of the main building, giving London one of its earliest iterations of American-style industrial ‘lofts’.
Upon completion, Watson House was re-named ‘The Piper Building’, in honour of the creator of its unique and striking decoration – with Lifschutz Davidson adding electric sun blinds to the new steel balconies in a bright ‘Piper’ yellow to extend the artist’s imprint across the whole building. The murals themselves were afforded Grade II listing in 2022, in recognition of their cultural significance.