Parcels vs Titles vs Addresses: How Land Ownership Works in Australia

Understand why an address is not a parcel, a parcel is not a title, and a title is not a rates assessment. Real-world multi-model property cardinality.

Open Land Fabric Admin

— 1 min read

When building proptech applications or conducting property due diligence, nothing causes more headaches than discovering that an address is not a parcel, a parcel is not a title, and a title is not a rates assessment. These four concepts represent completely different systems that happen to describe the same patch of Australian soil.

The Common Trap: Many databases assume a neat 1-to-1 relationship: one house = one address = one parcel = one title. In reality, Australian property administration is multi-model and exhibits 1-to-many and many-to-many relationships across all jurisdictions.

1. The Four Distinct Property Models

To understand Australian land data, you must separate physical delivery (G-NAF) from spatial geometry (Cadastral Parcel), legal ownership (Land Title), and municipal taxation (Council Assessment).

2. Real-World Cardinality Scenarios

Explore real-world scenarios including 1 address over multiple parcels (consolidated lots), multiple addresses on 1 parcel (dual occupancy), and multiple titles on 1 parcel (strata apartment schemes).

3. How to Find a Property's Lot and Plan Number

Conflate street addresses against the national cadastre to extract registered DP and SP identifiers for conveyancing and title searches.

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