An investment grade property is a real estate asset with the structural qualities to generate consistent capital growth, attract a broad owner-occupier buyer pool, and build long-term wealth. In Australia it is defined by lifestyle-driven location, a high land-to-asset ratio, scarcity that cannot be easily replicated, and broad buyer appeal. Fewer than 5% of Australian investment properties meet these criteria.
https://wealthnest.com.au/blog/what-is-an-investment-grade-property-in-australia