Buying property involves trust. You'll trust the contract, the title search, the agent, the fence line and what they see during inspection.
The problem is that fences, driveways, retaining walls and garden edges don't always match the legal boundary.
A cadastral survey identifies and defines property boundaries, and this is why they matter. In NSW, only surveyors registered with the Board of Surveying and Spatial Information can prepare plans of survey, with standards designed to protect the integrity of land boundaries and the property market. For buyers, this is not a technical detail. It is risk control.
The Fence is Not the Boundary
One of the most common mistakes buyers make is assuming the visible occupation line is the legal boundary.
A fence might have been built in the wrong place. A retaining wall might encroach (cross) into the neighbour’s land. A garage, eave, gutter, driveway or garden structure might sit partly outside the title particularly if the building has been altered, or if the block shape is irregular. In older suburbs, small errors can sit unnoticed for years until a buyer tries to build, extend, fence, refinance or sell.
An identification survey helps expose these issues before settlement or before design work starts. These surveys show the land, structures, improvements, distances to boundaries, easements, covenants and possible encroachments. They must be prepared and signed by a registered surveyor.
The key benefit is that you as a buyer learns what you are actually buying.
Encroachment can Turn into Cost
Encroachment is not always dramatic. It can be a fence out by 100 millimetres, a wall over the line, a stormwater pipe crossing land without an easement, or a neighbour’s structure occupying part of the block.
Small errors can still matter. They can affect useable land area, setbacks, development potential, insurance, neighbour relations and resale value. A buyer planning a renovation or dual occupancy may find that the land they assumed was available is not available at all. JRK Surveys notes that reliable site information helps identify potential issues early, including drainage concerns and encroachments. A survey is often seen as a cost. In practice however, it can prevent a much larger cost.
Title Does Not Show Everything on the Ground
A title search is essential, but it does not replace a survey. Title records show the legal parcel, interests and registered dealings. A survey checks how that legal parcel relates to the physical land. That distinction matters because the legal record and the occupied site can drift apart over time. Fences move. Buildings get extended. Old garages remain. Neighbours landscape. Owners build without measuring properly.
JRK Surveys describes a boundary survey as the tool that determines the exact legal perimeter of a property and marks where it begins and ends. It is useful for fencing, disputes, subdivision and development approvals because it gives owners legal certainty about their land.
Boundary Disputes are Harder After Settlement
If a buyer discovers a boundary problem after settlement, the leverage changes. The issue becomes theirs to manage. In NSW, boundary disputes can become formal matters. The Registrar General can resolve disputed boundaries where two independent registered surveyors disagree on the location of a common boundary, but this is a defined legal process, not a casual fix. Most buyers don't want that problem. They want certainty before they settle, renovate or build.
The Better Question for Buyers
The question isn't whether every property needs the same level of survey. The better question is whether the buyer understands the boundary risk before purchase. A survey is especially worth considering where the property is located in rural or semi-rural areas, has old fences, tight setbacks, retaining walls, garages near boundaries, recent renovations, irregular lot shapes, subdivision potential or obvious neighbour structures close to the line.
If you are buying property, don't let the fence line do the job of a registered surveyor. A cadastral survey protects buyers by turning uncertainty into evidence. It clarifies the boundary, identifies encroachments, confirms boundary ties and helps buyers decide with their eyes open.
