This study assesses the level of user importance to the building components of the Great Mosque of Mataram Kotagede Yogyakarta. The building components are the excellence and reliability of the mosque as a cultural and religious heritage in Indonesia. This research uses the qualitative and quantitative method. The qualitative method was conducted with contextual and conceptual studies on the comparative history of the Great Mosque of Mataram Kotagede. The quantitative method collected respondent perceptions using questionnaire. The results generate ten building components that the highest important component is the aesthetics appearance of the building, while the least important component is the tomb area. Other components consist of the ornaments and building elements, outdoor circulation, indoor circulation, landscapes and parks, the wall surrounding the mosque and its area, mosque furniture, ablution facilities and lavatories, and access from the mosque area to surrounding areas. The conservation maintains the sustainability of the physical and non-physical aspects of the mosque building. The physical aspects include aesthetics and reliability of building, while the non-physical aspects consist of historical values, heritage, symbols, socio-culture, local wisdom and religious tolerance
