The conservation of heritage architecture buildings is becoming more popular and significant, as there is a growing interest in changing city growth while conserving identity. One strategy for maintaining a heritage building’s identity is to modify the building’s uses, which we reveal based on prior expert-authored publications. However, five conservation methods are worth elaborating on in order to conduct the cultural preservation of heritage buildings in Indonesia. In this study, we assess the existing experience of conservation methods in many heritage buildings in Indonesia and consider the concepts of preservation, maintenance, restoration, reconstruction, and adaptation in practice. When Henry Maclaine Pont designed the Barakgebouw building in 1920, those conservation techniques had been successfully used. Bandung Institute of Technology’s West Hall is currently often referred to as Technische Hoogheschool Bandung. The practical value of his architectural work is found in the integration of the research findings into contemporary architectural practice and regional indigenous vernacular heritage, particularly in the cultural preservation of Indonesian historic structures. This research was expected to be crucial for subsequent studies on Indonesian heritage buildings’ interior conservation techniques.