To be eligible for the First Home Owners Grant you need to;
Purchase an established home, newly built home or buy vacant residential land and build a home. as your principal place of residence for the first time.
Purchase an established property or a new home for less than $600,000 to be fully exempt from Stamp Duty. First Home Buyers are also eligible for stamp duty reductions when purchasing above $600,000 but under $750,000.
Generally, one of the purchasers is required to be an Australian citizen or permanent resident aged 18 or over when buying the property.