Facade is an identifiable identity of a building. As a unique tribe, Tenggerese has its own facade character. As a tourism village, it does not mean that facade of the building does not change. Changes in facade of a building can be seen from its basic geometry. Façade's geometry can be seen in the form of rectangles, triangles, circles, and its variations. Changing Tenggerese house's facade in Ngadas can be explained through basic geometry of the building, to provide character of Tenggerese house. Research was done through qualitative descriptive approach with sample selection by purposive sampling toward house which representing house typology in Ngadas Village. The results show, changes that occur were addition of parts, resulting in changes in geometry. This is caused by economic factors, because of the increasing standard of living of Tenggerese people. There was also a very drastic transformation by replacing all the original characters, such as the geometry of the roof which is no longer triangular but flat square. This is due to the development of homestay that mushroomed due to tourism activities. However, not all facade geometry changes, there was also a new building that has same character with concept of continuity to original character.