孙中山基地纪念馆位于打铜仔街的120号店屋内。此店屋约建于1880年，屋身甚长，约有130呎，前后三进深。它晚期华南折衷式建筑风格。底楼门面有梳子门。门两侧开木窗，窗上头设气窗。一楼外墙由栏梁支撑，梁上有矮墙，内置绿釉花窗。矮墙上是通排的百叶窗，上下水车堵皆作彩绘。铜仔街120号是文思古建公司少数的槟城店屋修复工程，始于2010年，同年竣工，主要修复外墙门面的彩绘和剪黏，以及入口梳子门。

Sun Yat-sen Museum former base or No. 120 Armenian Street in Penang is a residential shophouse on Armenian Street. It was built around the year of 1880. The shophouse has three sections with an unusual length of 130 feet. The exterior facade reflects the characteristics of a late Southern Chinese Eclectic style shophouse. The ground floor facade is equipped with a traditional gilded comb door, paired with timber windows and fan-shaped air vents. On the first floor, a bressummer beam supports a low wall with green ceramic vents. Above the low wall is a series of full width timber louvred shutters, which are then topped by coloured panels. No. 120 Armenian Street is one of the few Wensi Heritage’s undertakings on heritage shophouses. The restoration focuses on the decorative paint works and jian nian sculptural works on the front facade as well as making a new comb door.