Kanoman Palace and Kacirebonan Palace located in Cirebon, Indonesia still show their existence until today. The form of the existence is shown through the appearance of the palace building, the king, and all the activities. Although both palaces are similarly a palace space, but there are some differences on the quality of the buildings. The differences are considered as the initial stage of cultural heritage building conservation. Palace or keraton is an initial formation of a city space. The structure of the palace space shows the development of civilization and culture that is served as a knowledge. The aim of this study is to describe the quality of the material and the building of Kanoman Palace and Kacirebonan Palace. The approach method used is a comparative technique for the two palace buildings by collecting reference of conservation technology on materials in the building of cultural heritage that can be applied to the buildings of the palace. Furthermore, the quality of buildings is obtained from the results of fieldwork and research reports conducted previously. The results of this study can be found to take technological steps in the conservation of cultural heritage buildings in the Kanoman Palace and Kacirebonan Palace. The implication for the local government of the city of Cirebon is to help making strategic policies in the procurement of conservation technology for the palace buildings.