As the life cycle of a building lasts longer in the face of a low-growth period, the maintenance of old buildings is becoming more important. According to the national building statistics at the end of 2019, the ratio of buildings older than 30 years or more after the completion is about 37.8% of all buildings, and the number is increasing each year. In particular, due to the huge housing supply in the 1990s, the number of old houses is expected to increase rapidly from 2020. However, only 1.7% of the existing buildings are subject to the maintenance according to the Building Act and the Special Act on the Safety Control and Maintenance of Establishments, and thus, about 98.27% of the existing buildings are in the blind spot of the management system.
In addition, although the dismantling, demolishing and remodeling works are increasing due to the increase of old buildings, collapsing accidents are occurring continuously because of the insufficient safety actions on the sites. Moreover, the demand for fire safety is also increasing due to the large fire
accidents that are continuously occurring at existing buildings.

As social consensus has been formed on the need for preparing an institutional means to systematically manage the actions after completion depending on the life cycle of buildings, the Building Management Act was enacted on April 30, 2019 and has been enforced since May 1, 2020.