Kampung Mahmud is one of the villages in Indonesia. Normally an indigenous village generally have distinctive features and special rules one of them is building. The building was established following the climate, culture, environment and materials, religion/beliefs, tradition law, science and technology at the time. Based on these, so Kampung Mahmud can be regarded as a vernacular village. Simplicity that highlighted of building be a characterize of building typology which existing in Kampung Mahmud. Nowadays building typologi in Kampung Mahmud has changes a lot started with the times. By qualitative research methods, survey, observations and interviews with relevant parties, obtained aspects that influence the development of the alteration building typology in Kampung Mahmud.