Mandatory Building Inspection Scheme (MBIS) is a kind of preventive approach to tackle the building maintenance problem through the identification of target buildings by the Authority for the prescribed inspection and the necessary subsequent remedial works. Since the launching of the MBIS in 2012, around 4,000 target buildings were selected and owners of these target buildings are required to appoint Registered Inspectors to conduct the prescribed inspection in compliance with the legislative requirements. Subsequent prescribed repair works have to be carried out to rectify the identified defects and restore the building conditions. There is an observation at the initial period of the launching of the Scheme that some owners were not taking positive response, trade practitioners were also not actively involving to offer the services. The Building Authority has to serve warning letters and take action against these owners. Having said that, some responsible owners followed the required procedure and there is recent observation that more registered inspectors participate in this market. The Building Authority has kept such data and kept monitoring the market situation. We have invited the Chief Building Surveyor of MBIS Section, Buildings Department, Sr Patrick TSUI, to discuss with us from the government angle on various aspects in the implementation of MBIS, which will cover the followings: Objectives and main requirements; Progress and achievements; Promotion and assistance to owners; Enforcement and regulation of service providers; Challenges and improvement measures; and Way forward. The Scheme is applicable to the whole territory irrespective of the district. However, it appears that buildings at some early developed areas are found in comparatively poor conditions. Pressure to upkeep the building conditions may be different and varies from district to district. There is recent publication of a research on the study of the building stocks in Hong Kong. The better understanding on the statistics of aged buildings in Hong Kong, the better on the planning of building maintenance in the territory. We have invited Sr Dr Ken CHAN, who is the lecturer at the Department of Construction Technology and Engineering, Technological and Higher Education of Hong Kong (THEi), to share with us his research findings which will cover: Statistics and analysis on the existing stock and distributions of private buildings and density among the 18 Districts of Hong Kong; and The existing stock of private aged buildings and provide projection of future building stock in the next decade.