The Covid-19 pandemic has led to the adaptation of new habits to prevent transmission of Covid-19 in the workplace. In Indonesia, two work systems currently apply, namely working from home (WFO) and working from the office (WFO) to minimize the spread of Covid-19. It is necessary to prepare office facilities and infrastructure to comply with the Covid-19 protocol, and it is necessary to develop an instrument for assessing building readiness. In this study, a building readiness assessment instrument was prepared according to the Covid-19 protocol using a questionnaire. The methodology to design the questionnaire uses the literature study method, validation on three experts, and reliability testing on 24 Covid-19 unit task forces.

Furthermore, the final questionnaire was used to assess the readiness of 83 buildings in ITS by using the safety culture maturity level scoring. The result shows that 1.2% of buildings are at the reactive level, 12,05% of the buildings are at the bureaucratic level, 44,58% of the buildings are at the proactive level, and 42.17% of the buildings are at the generative level. At the end of the study, can concluded that the building at the proactive and generative level could carry out work activities in the office. Meanwhile, buildings at the bureaucratic and reactive levels need to improve the Covid-19 protocol before being reactivated.