According to the surveys of 84 Hue traditional garden houses located in Hue Royal Citadel area, these garden houses can be divided into 7 types based on fayade elements and designs of nhii chlnh-major house (existence of ban khoa door
existence of veranda columns
and existence of separate veranda roof). Among these 7 types, type 5 (no ban khoa door/veranda columns/ separated veranda roof) is a typical type with 41 traditional garden houses. In contrast, there are 3 houses in type 3 (ban khoa door/no veranda columns/no separated veranda roof) and also 3 houses in type 4 (no ban khoa door/veranda columns/no separate veranda roof). Among these 7 types mentioned above, there have been transformation from simple forms with local and wooden material to complicated forms with durable materials such as brick, steel and concrete. In addition, type 5 is seemingly final form for transformation from other types of nhii chlnh (major house).