This mansion appears as idol’s Tony’s house, in front of which Sung Shi-won (Jung Eun-ji) squats fangirl-style in a paper carton on the sidewalk in episode 3 of Reply 1997 (응답하라 1997) (tvN, 2012) to be able to see him. “Oppa, I love you,” she manages to tell him after hours of painful waiting.
This mansion is located in Pyeongchang-dong [평창동], Seoul.
It has been thoroughly renovated (if not replaced) in 2014 and doesn’t resemble the house seen in Reply 1997 at all (see Daum screenshots).
Adress: 서울 특별시 종로구 평창동 479-1
(서울 종로구 평창30길 41)
Geolocation: 37.613159, 126.974767