Since its inception in 2005, On Constructions Pty Ltd has gained a solid reputation within the Medical Building Industry. Based on the values of hard work, attention to detail and relationship building On Constructions reputation has grown steadily over the years leading to a continued stream of referrals from happy and satisfied clients. On Constructions is a Sydney based, Australian owned and managed company. On Constructions offers a vast range of Healthcare and Medical Building Services and expertise in the Greater Sydney, Hawkesbury, Illawarra, Hunter Regions and the ACT.