Rumah adat are traditional houses built in any of the vernacular architecture styles of Indonesia, collectively belonging to the Austronesian architecture. The traditional houses and settlements of the several hundreds ethnic groups of Indonesia are extremely varied and all have their own specific history. It is the Indonesian variants of the whole Austronesian architecture found all over places where Austronesian people inhabited from the Pacific to Madagascar each having their own history, culture and style.

The architecture of Indonesia reflects the diversity of cultural, historical, and geographic influences that have shaped Indonesia as a whole. Invaders, colonizers, missionaries, merchants, and traders brought cultural changes that had a profound effect on building styles and techniques.