The fence line is one of the most practical spots for a shed in a suburban backyard. Most Australian councils require a minimum 900mm setback from a side boundary for an outbuilding, and that number shapes everything: which shed width works, how the roof overhang sits, and whether you need a development application at all.
This Easyshed guide covers the setback rules by state, what 'slim' actually means in standard shed sizing, and what to check before you measure up a fence-line site.
What Do the Setback Rules Actually Say in Each State?
Most homeowners assume any shed can go right up against the fence. That's rarely the case. Australian councils set minimum boundary clearances, called setbacks, that apply to outbuildings like sheds, garages, and pergolas.
The 900mm rule is the most common standard across Australian states, but it's set at the local government area (LGA) level, not nationally which means your neighbour two streets over might be working to a different number. Here's how it generally breaks down by state:
- NSW: 900mm from side and rear boundaries for outbuildings under 20m² (source: NSW Department of Planning Complying Development Code, Clause 3.36).
- VIC: 600mm to 1m depending on lot size and zone (source: VIC Planning Permit Pathway and ResCode Schedule 7).
- QLD: 1.5m from rear boundary in standard residential zones (source: Queensland Development Code MP 1.2).
- SA: 900mm side setback for exempt outbuildings (source: SA Planning and Design Code).
- WA: 1m from any boundary for most residential outbuildings; smaller structures may attract reduced setbacks under some R-Codes provisions, but a setback still applies (source: WA R-Codes Volume 1).
- TAS: 900mm from side boundary for permitted development (source: Tasmanian Planning Scheme).
These numbers assume your shed qualifies as exempt or complying for development. The moment you go over certain thresholds (usually 10m² floor area, 2.4m wall height, or 3m ridge height) you'll likely need a planning permit, at which point setbacks may increase.
The short version: Check your specific LGA's exempt development rules before you measure up your fence line. Most councils publish this online, or you can call your local planning desk.
What Does 'Slim' Mean in Standard Shed Sizing?
Shed manufacturers typically describe sheds by their external footprint, width x depth. An Easyshed 3x3m Gable Roof garden shed is 3 metres wide and 3 metres deep. When people talk about a slim shed for a fence line, they usually mean a shed where the narrow face runs along the boundary.
Common narrow widths in Australian shed ranges run from 0.78m to 1.9m, like the Easyshed Narrow Slider and Skillion Roof shed models.
Go with a 1.9m wide kit and you'll get a usable internal width of roughly 1.8m once you account for wall cladding and frame thickness. That’s enough for a workbench along one wall and floor-to-ceiling shelving on the other.
A 3x3m shed can also work well on a fence line, positioned with one face running parallel to the boundary and a 900mm gap maintained. That puts your shed footprint at 3m along the fence and 3m into the yard. The 9m² floor area also keeps you under the threshold at which most LGAs require a development application, which is a practical reason many homeowners gravitate toward this size.
Steel sheds have an advantage over timber here. The frame-to-frame dimensions are tighter, which means less footprint for the same internal space. A steel shed's wall profile is typically 50–80mm, versus 90–120mm for a framed timber structure. On a tight site, that difference adds up.
What Should You Measure Before You Order?
The most common mistake is measuring the gap between fence and house and assuming the shed will fit. There are usually more constraints than just width.
Here's a handy list to work through:
- Overhang clearance: Eaves and roof overhangs on most sheds extend 150–300mm beyond the wall line. If your shed is 900mm from the fence, the overhang may put the roofline within 600mm. Some councils measure from the eave, not the wall. Check which measurement your LGA uses.
- Ground slope: A fence line that drops even 50mm over 3m will require levelling. Concrete slab or compacted gravel are the standard base options. A sloped site adds cost and may affect which orientation the shed can face.
- Gate and access: If the shed is deeper than your side gate opening, getting large items in and out (wheelbarrows, lawnmowers, timber sheets) becomes difficult. Measure your gate opening width, not just the fence gap.
- Neighbour's structures: If your neighbour has a shed on their side of the shared boundary, combined setbacks may apply under some councils' rules. Worth checking before you build.
🏠 Related: Our Best Shed Flooring Options for Australian Backyards blog covers base preparation options for tight or sloped sites in more detail.
💡 Also useful: How to Set Up a Home Workshop in a Garden Shed if your fence-line shed is earmarked for tools or workshop use.
Frequently Asked Questions
How close to the fence can I put a shed in Australia?
The most common setback is 900mm from a side or rear boundary, but this varies by state and local council. NSW, SA, and Tasmania generally apply 900mm for exempt development. Victoria can go as low as 600mm depending on zone and lot size. Queensland typically requires 1.5m from the rear boundary. Always check with your specific LGA before you build.
How narrow can a garden shed be and still be usable?
Most Australian shed manufacturers offer widths starting around 1.2–1.5m, though internal usability drops off significantly below 1.5m. A 1.5m x 3m or 1.8m x 3m footprint is the practical minimum for a shed you can actually move around in. At 1.2m wide, you're looking at a storage locker rather than a working shed.
Do I need council approval for a shed along a fence line?
In many Australian LGAs, sheds under 10m² floor area and under 2.4m wall height qualify as exempt development. No council approval is needed as long as setbacks are met. Go over those thresholds, or place the shed in a heritage overlay or bushfire-prone zone, and you'll likely need a development application. Check your council's exempt development criteria online or phone the planning desk before you start.
What is a 3x3 shed actually like to use along a fence line?
3x3m shed positioned with its long face parallel to the fence takes up 3m of fence line and extends 3m into your backyard. That's a 9m² footprint, which sits under the typical exempt development threshold, and gives you enough floor space for a workbench, shelving, and bike storage. If you position it with one of the 3m walls 900mm from the boundary, you'll have a side access path of exactly that width, which is just enough for a wheelbarrow.
Two numbers drive the whole decision: your council's setback, and the width of the gap you're working with. Get both confirmed before you shop and the rest follows from there: shed size, orientation, base type.
