Its original Western-style ferroconcrete building used to be the former Kyoto Central Telephone Office, which was designed by Tetsuro YOSHIDA, an architect of the Ministry of Communications Building and Repairs Section, constructed by Shimizu Gumi (now Shimizu Corporation), completed in 1926, and extended in 1931.
原形となる鉄筋コンクリート構造の洋館は、逓信省営繕課技師の吉田鉄郎による設計、清水組（現清水建設）の施工で1926年竣工、1931年に増築された京都中央電話局。