The Henry Moore Foundation was founded by the artist in 1977 to encourage public appreciation of the visual arts. Despite careful preservation of Moore’s estate at Perry Green (UK), the Foundation’s activities had outgrown their facilities. The project brief called for robust, economic and intelligent solutions with high levels of energy efficiency achieved with designs, which would be sympathetically integrated into the sensitive landscape. Dane Tree House has been re-purposed to accommodate environmentally controlled art stores and offices for the Foundation. It has been extended to accommodate visitors’ facilities within a timber-clad and glass pavilion, which wraps around three sides and doubles up with a sweeping curve to create the curatorial offices on the first floor. The building has been meticulously re-planned to ensure separation of public and private functions, which is critical to international art handling operations. The archive contains publications, correspondence, photographs and exhibition material. It was housed in a former dwelling, which was in poor condition. The house has been refurbished and extended with a new wing clad in Corten steel. Storage is fully compliant to national standards for archive conservation.