McGrath is the founder of McGrath Estate Agents, a real estate company in Australia. The company was listed on the ASX beginning in 2015, with McGrath retaining 27% share of the company. It has been considered one of Australia's largest real estate networks.
McGrath has grown to be one of Australia's most successful residential real estate groups. The McGrath network currently has 94 offices throughout the East Coast of Australia. It has an established market presence in NSW, QLD and the ACT, and has now expanded into Victoria. An integrated real estate services business, McGrath operates five business units providing residential property sales, property management, mortgage broking, auction services and career training.