A stratum subdivision is a Torrens title subdivision, where lots are created as stratum lots. These stratum lots are limited in height and depth. Stratum subdivisions are essential for mixed use developments where there are multiple uses over a parcel of land that differ over different floors in the development. Each stratum lot represents a specific portion of the building, such as a floor or a defined vertical section.

Unlike a traditional horizontal subdivision, where land is divided into separate lots, a stratum subdivision focuses on the vertical division and ownership within the building. Each stratum lot owner has exclusive ownership rights over their designated space.

Stratum subdivisions are commonly used for commercial, residential, or mixed-use buildings, including apartments, office complexes, and shopping centres. They provide a way to divide and manage ownership and responsibilities within a multi-level structure, allowing for efficient use of space and shared amenities.