Colorbond Fence Heights in Sydney: 1.8m, 2.1m or Higher?
Updated: Oct 13
Most Colorbond boundary fences in Sydney are built at 1.8 metres, and that is the height the majority of homeowners end up with. Sheets are also commonly available shorter for front and feature fencing and taller - around 2.1 metres - where extra privacy or noise screening is wanted. What you are actually allowed to build depends on your council, your property, and in the case of a shared boundary, your neighbour. Here is how to work out the right height before you order anything.
The heights you will usually be offered
Around 1.2m and below: front fences, feature panels and low screening. Low enough to keep street appeal and, in many areas, low enough to avoid triggering extra approval - but always check your own council's controls.
1.5m: sometimes used on side boundaries where a full-height fence would feel heavy, or where a retaining wall already lifts the fence line.
1.8m: the standard side and rear boundary height across most of Sydney. Enough to give real privacy to a single-storey home and to a ground-floor outlook.
2.1m and above: used where privacy, traffic noise or an overlooking neighbour justifies it. This is the height most likely to need approval and most likely to need a conversation with the person on the other side.
Height is also affected by what sits under the fence. A plinth board, a step down a slope, or a retaining wall the fence sits on all change the finished height above ground, and councils generally measure from natural ground level - so a fence on top of a retaining wall can be treated very differently from the same fence on flat ground.
What the rules actually say
There is no single Sydney-wide number. Fence height is controlled by your local council through its planning controls, and in many cases a fence below a set height on a side or rear boundary can be built as exempt development without a development application, while a taller fence, a front fence, or a fence in a heritage conservation area may need approval.
Because those thresholds differ from one local government area to the next - and can differ between zones within the same council - the only reliable answer is your own council's controls and the NSW Planning Portal. We have set out how that process works in our guide on whether you need council approval for a fence in Sydney. Treat anything you read online, including this page, as background rather than a ruling on your block.
Separately, if the fence is on a shared boundary, the Dividing Fences Act process governs what a neighbour can be asked to contribute towards. A neighbour is generally only expected to share the cost of a reasonable standard of fencing - so if you want extra height purely for your own benefit, expect to fund the difference yourself. See who pays for a dividing fence in NSW, and take any legal question to NSW Fair Trading or LawAccess NSW rather than to a fencing contractor.
Front fences are a different conversation
Front fence heights are usually controlled more tightly than side and rear boundaries, because councils care about the streetscape and about sight lines for cars coming out of driveways. In older suburbs and conservation areas the controls can also cover materials and style, which is one reason solid metal front fences are less common on character streets. If a front fence is what you are planning, our front fence ideas for Sydney homes is a better starting point than a height chart.
Adding height to an existing fence
If an existing 1.8m fence is sound but not private enough, you do not always need to start again. Common options are a lattice or slat extension fixed above the sheets, taller posts installed at the outset so extensions can be added later, or planting a screening hedge behind the fence instead. Two practical cautions: an extension adds wind load to posts that were never designed for it, so the posts and footings need to be up to it; and adding height can be exactly the change that tips the fence over an approval threshold.
Sloping blocks: stepped or raked
On a block that falls, a Colorbond fence is either stepped - each panel level, dropping in stages - or raked, following the ground line. Stepping looks crisper and is more common, but it leaves triangular gaps at the bottom of each step that are usually closed with plinth boards or a small retaining element. Raking avoids the gaps but needs panels made for it.
Either way, the fence's nominal height and its actual height above ground will differ along the run, which matters both for privacy and for how a council measures it. Where the fall is steep enough that soil has to be held back, read our retaining wall guide first - the retaining decision comes before the fence.
Taller fences need more under the ground
This is the part homeowners rarely see and installers argue about. A 2.1m fence catches noticeably more wind than a 1.8m one, and that load goes straight into the posts and footings. Taller runs generally want larger posts, deeper and wider footings, and sometimes closer post spacing - particularly on exposed corner blocks and anywhere with soft or reactive soil. A tall fence on undersized footings is the one that leans after the first serious southerly.
If you are pricing up a taller fence, make sure the quotes you compare specify post size, footing depth and post spacing, not just height and colour. Our fencing cost guide explains what should be itemised, and our fence installation guide walks through how the job runs on site.
Frequently asked questions
What is the standard Colorbond fence height in Sydney?
1.8 metres is the usual height for side and rear boundary fences. Lower heights are common at the front, and 2.1 metres is available where extra privacy or screening is wanted and approval allows it.
Can I build a 2.1m Colorbond fence without approval?
Sometimes, and sometimes not - it depends on your council's controls, the boundary it sits on, the zone, and whether the property is in a heritage conservation area. Check your council and the NSW Planning Portal before ordering materials.
Does a retaining wall count towards the fence height?
It often does, because councils generally measure from natural ground level rather than from the top of a wall. If your fence is going on top of retaining, raise that with your council early - it is a common surprise.
Can I make my existing Colorbond fence taller?
Extensions exist, but the posts and footings have to be able to carry the extra wind load, and the added height may need approval. It is worth checking both before committing.
Does my neighbour have to pay for extra height?
Generally a neighbour is only expected to contribute to a reasonable standard of dividing fence. Extra height for your own benefit is usually yours to pay for. NSW Fair Trading is the right source on that process.
Not sure which height suits your block? We fence across Sydney and can look at the fall, the access and the boundary before anything is ordered. See our main Sydney fencing page, read more on Colorbond fencing or aluminium versus Colorbond, and request a quote here.
Read next: Colorbond fencing on a sloping block. Gate heights follow the same logic as the fence around them - see our guide to Colorbond driveway gates.
Also worth reading: Front Picket Fence Heights: A Sydney Guide
If your existing fence is structurally sound but simply too short, adding height is often an option instead of starting again - our guide to Colorbond fence extensions in Sydney goes through what the posts and footings will actually take.
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