Documentation of 100 Heritage Buildings in Chennai authorized by CMDA (Chennai Metropolitan Development Authority) was given to McGAN’S Ooty School of Architecture in the year 2017. The students numbering 33 and 7 faculty took over the task of visiting all the 100 buildings as per the list given by CMDA authorities. The project stretched over 10 days during the time of which students stayed in Chennai and did site survey by taking the photographs of heritage buildings and by interviewing stake holders and users of the particular sites. Students were divided into groups of three and did archival studies in libraries and museums in Chennai. They also met historians and collected the latest information on certain sites. Some of the building typologies covered were palaces, temples, graveyards, hospitals, colleges and museums etc.