My house is super close to two subway stations.
Eonju Station (Line 9) / 1min by walk, airport line (ICN, GMP airport) / 3 stops from COEX
Yeoksam station (Line 2) / 5min by walk, 1 stop from Gangnam
Covenient Store, Bakery, Cafe are very close to the Sweet Home. Many Restaurants (Korean, Japanese, Western Styles...) are near Yeoksam station.