If you are looking for a property survey for fence work, the short answer is that only a licensed land surveyor can tell you where your boundary legally sits. Not a builder, not a fencing contractor, not a neighbour with an old plan, not an aerial imaging operator. Boundary definition is licensed cadastral work.

Most people searching this are not yet in a dispute. They are about to build or replace a fence, or something does not look right, and they want it correct before anything gets pulled down.

We are a CASA-licensed aerial imaging operator in Melbourne’s south-east. We do not define boundaries and we do not give legal advice. We produce a dated record of what a site looked like on a given day — knowing that difference will save you money.

Why people look for a property survey for fence work

Four situations account for nearly all of it.

Building a new fence. There was never a fence there, or the block has been subdivided, and you want the new one on the line rather than 300 mm inside your own land.
Replacing an existing fence. You want to know whether “where it has always been” is actually the boundary. Old fences drift — rebuilt slightly off, or following a garden bed rather than a title line.
A neighbour has built over the line. A fence, retaining wall, shed, carport slab or driveway that appears to sit on your side. This is where boundary disputes and fences usually begin.
Something is brewing. Nothing has been built yet, but the conversation has gone cold.

The first two are planning problems. The last two are evidence problems.

What a fence or boundary survey actually is

A boundary survey — often called a re-establishment survey — is a licensed surveyor physically identifying your title boundaries on the ground. They work from the Certificate of Title, the plan of subdivision, historical survey records and existing survey marks, then mark the corners and the line so a fence can be built to it.

Only a licensed land surveyor can do it. In Victoria, cadastral surveying is restricted work carried out by surveyors licensed for it. If a matter reaches a court or a mediator, an unlicensed opinion about where a line sits is worth very little.

Aerial imagery cannot legally define a boundary. This is the most common misunderstanding we hear, so we will be blunt. Drone imagery, orthomosaics and mapping overlays can be very accurate about where physical things are — a fence, a wall, a slab, a tree line. None of that is a title boundary. A boundary is a legal construct that exists on a plan, and only a licensed surveyor can put it on the ground.

The Victorian fencing process, in general terms

General information only, not legal advice, and simplified. Dividing fences in Victoria fall under fencing legislation that sets out a structured process. Broadly:

Adjoining owners generally share the cost of a sufficient dividing fence — one adequate for the properties as they are used, not the best fence either party can imagine. An owner wanting more than that standard typically pays the difference.
It usually starts with a written fencing notice to the adjoining owner setting out the proposed works, the fence type and the estimated cost. The neighbour has a defined period to respond, and if agreement is not reached there is a path through the courts.
Where the boundary itself is unclear, there is separate provision for giving notice that a survey is needed, with the cost generally shared.
Free mediation exists. The Dispute Settlement Centre of Victoria handles fencing matters at no cost.

Doing these steps in order is cheaper than doing them after a fence has come down.

Where fence disputes actually go wrong

Almost every difficult neighbour dispute over a fence has the same problem: something changed, and nobody has a reliable record of what was there beforehand. The fence came down, the retaining wall was rebuilt, the trees were removed. The line everyone assumed was the boundary no longer exists, and two people are describing it from memory, differently, with different interests.

The photographs people have at that point are incidental, with no clear date or position. They prove a fence existed, not where it sat. The party with the better record of the “before” state is in the stronger position.

What a dated aerial capture does give you

Here is the honest scope. A capture flown before anything changes gives you an accurate, timestamped record of existing conditions — and that is all. It does not define a boundary or resolve a dispute. It makes the site, as it was on a specific date, impossible to argue about. It records:

The existing fence along its full length, including the sections nobody photographs — the rear corner, the return down the side, the part behind the shed.
Structures near the line. Sheds, carports, retaining walls, slabs, driveways, overhanging eaves and any apparent encroachment, relative to the fence and wider site.
Vegetation. Tree positions, canopy spread and overhang — before anything is cut back or removed, frequently the trigger for the dispute.
Site context and levels. How the ground sits on both sides, where a retaining wall, drainage or a fall across the boundary is part of the argument.
Provenance. Delivered as a Site Record Pack — cover sheet, manifest, methodology statement, file integrity ledger, metadata intact — so the capture date, time and position travel with every file. A record like this gets tested on exactly those points: when was it taken, by whom, has it been altered.

The point is timing rather than technology. Document early, cheaply, before it escalates — once a fence is down the moment has passed. This sits underneath a surveyor’s work: an orthomosaic gives everyone a measurable, current base image, and the surveyor puts the legal line on it.

What to document now

If a fence is going up, coming down, or causing friction, do these this week. Most cost nothing.

Take dated photographs along the full length of the fence, from both ends and several points between. Include wide shots showing the fence in relation to the house and other fixed features — not just close-ups. Keep the originals; do not crop or re-save them.
Record the fence’s current condition and position. Leaning, rot, damaged palings, missing sections, anything built up against or over it. Photograph both sides if you can do so lawfully, without entering your neighbour’s land.
Put communication in writing. Follow up any doorstep conversation with a short, polite email confirming what was discussed. Keep the exchanges where nothing was resolved too.
Get your Certificate of Title and plan of subdivision. Inexpensive, and the starting point for every conversation that follows.
Find any existing survey. Check your purchase documents, the council building file and subdivision paperwork. A previous re-establishment survey can save you commissioning a new one.
Capture the site before anything changes. If works are imminent, this is the last chance to record the “before” state. A capture after demolition documents an argument, not a fence.

Then take advice. The sequence that works: document what is there now, obtain the title, talk to the neighbour, use free mediation if that stalls, engage a licensed surveyor if the boundary is genuinely in question, and see a solicitor if it goes further. Documentation supports a position rather than replacing one — but skipping the first step is the only part that cannot be undone.

This article is general information only and is not legal advice. Boundary definition is licensed cadastral work and must be carried out by a licensed land surveyor. Fencing law and procedure differ between states and depend on the property’s circumstances. For advice on a specific fence or boundary dispute, speak to a solicitor; for the position of your boundary, engage a licensed surveyor.

Frequently asked questions

Do I need a property survey to build a fence?

Not always. If both neighbours agree on the line and the fence is replaced in the same position, many are built without one. You need a survey when the boundary is unclear, when there is no existing fence, when a subdivision has changed the lot layout, or when either party disputes the line.

Who can legally determine a property boundary in Victoria?

A licensed land surveyor. Defining or re-establishing title boundaries is restricted cadastral work, and a survey by anyone else has no legal standing. Builders, fencing contractors, aerial imaging operators and mapping software can describe where objects sit, but none can place a boundary on the ground.

Can drone or aerial imagery show where my boundary is?

No. Aerial imagery accurately records where physical features sit — fences, walls, slabs, trees, encroaching structures. It cannot define a legal boundary, because a boundary exists on a title plan rather than on the ground. Aerial capture documents conditions; a licensed surveyor determines the line.

Who pays for a dividing fence in Victoria?

In general terms, adjoining owners share the cost of a sufficient dividing fence — one adequate for how the properties are used. An owner wanting a higher standard usually pays the difference. The process normally begins with a written fencing notice setting out the proposed works and estimated cost.

What should I do if my neighbour builds a fence over the boundary?

Document it before anything changes: dated photographs of the structure and its position relative to fixed features. Obtain your Certificate of Title and raise it in writing. If that stalls, free mediation is available through the Dispute Settlement Centre of Victoria, and a licensed surveyor can establish the line.

Is it worth documenting a fence before a dispute has started?

Yes, and it is the cheapest thing you can do. Most fence disputes turn on what was there beforehand, and by the time the dispute is live the fence has usually been removed. A dated, metadata-intact record costs a fraction of the argument it can shorten.

Property Survey for Fence: What to Document First