Obayashi HDB Tengah C3C7 is a construction site for public housing blocks in Tengah, at 222A Tengah Garden Avenue. The company, Obayashi Singapore, was set up in 1965, and it has been a Singapore subsidiary since 2014. On this Build-To-Order project it worked with the Housing and Development Board to try new site technology. An autonomous tower crane system, used with Skyjuster, lifts and positions precast parts before they are fitted. A crane guidance system with LiDAR lets several cranes work close together without colliding. The company says these tools make lifting more precise and reduce the need for workers to guide loads by hand. One review praises the site's safety standards, its regular safety briefings and its monitoring tools. Within a kilometre there are three other builders on Open Locally. Garden Vale at Tengah, 0.5 km away, has fewer reviews.