1934年にこの建物の新たな所有者となったのが越中（富山県）出身の寿原外吉です。外吉は建築資材としての金物や硝子を全道に卸す事業で大成しました。外吉没（1985年）後の翌年、遺族が土地建物を小樽市に無償譲渡されたことから「旧寿原邸」と称されています。当時の新聞には時価総額1億4千万円と記されています。
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Sotokichi and the Suhara residence
In 1934, the new owner of this building was Sotokichi Suhara from Ettyu(Toyama Prefecture). Sotokichi was very successful in the business of distributing hardware and glass used as building materials throughout Hokkaido. It is called the former Suhara residence because the land and building were transferred to Otaru City for free to the bereaved family of Sotokichi the year after his death(1985). The newspaper at that time reported that the Suhara residence was worth a total of 140 million yen.