The need of a public housing in a large city such as Bandung kept developed as the increase of the inhabitant of Bandung. Leuwigajah public housing is a small-scale public housing where the pleasures inside are based on the pleasure of each units. The purpose of this research is to analized the building from the thermal condition. The object of this research is leuwigajah public housing, because it is a newly build and it is newly operated, remembering that the building is a Cimahi Government project in order to arranging the low area of this city with build a nice and neat housing. The methods used are direct observation, interviewing the residents and using Ecotect software tpo analized the lighting inside the buiding. In order to gain an architectural knowledge, to build a building, not just an aecthethic is important, but also a thermal condition, for make a better housing to live.