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If you’ve ever asked, “What is the standard shed size?” — you’re not alone. It’s one of the most common questions people ask when planning a new shed.
The short answer? There’s no such thing as a true “standard” when it comes to shed sizes anymore.
Custom Shed Sizes — Built to the Millimetre
Thanks to modern shed design software, most quality suppliers now offer fully custom shed sizes — tailored to suit your space, wind zone, slope, and layout preferences.
Whether it’s a 6m x 8m workshop or a 12m x 20m machinery shed, almost every dimension can be tailored to suit your space, wind zone, site slope and personal layout preferences. That means no wasted space, no unnecessary compromises, and far fewer surprises later on.
So Why Do “Standard Shed Sizes” Still Exist?
While there’s no official industry standard, shed companies often advertise common sizes like:
- 3m x 3m garden sheds
- 6m x 6m double garages
- 7m x 9m workshops
- 10m x 10m machinery sheds
Remember, these are a guide, not a limitation
These sizes are simply popular reference points that suit common residential and trade needs. They’re often more frequently used because:
- They’re efficient and cost-effective to produce. Manufacturers may buy and cut materials in bulk based on fixed dimensions, which helps reduce wastage.
- Using fewer materials by pushing structural spans to their engineered limits often results in lower prices.
- It can be easier, especially for online shed companies, to mass-produce sheds in fixed sizes, colours, and designs. By manufacturing in bulk, they streamline production and keep their margins low, offering more competitive upfront pricing.
The down-side of ‘standard sizes’:
While these ready-made options may seem appealing and even cost effective at first glance, they often come with trade-offs including:
- Limited customisation
- Generic engineering that may not suit your site
- Lack of local support
That’s why working with a trusted local supplier can make a big difference. You’ll get a shed tailored to your needs, designed to suit your specific site conditions, and supported by experienced professionals who know local regulations and weather challenges.
And that’s exactly what I offer through The Shed Guru — a service that connects you with vetted, reputable shed companies across Tasmania, so you can compare quotes, avoid pitfalls, and get the best value for your investment.
A good approach: Start by designing a shed size that fits your needs best — then compare it with standard sizes to see where you can save or optimise.
Want some inspiration or guidance on choosing the right size and layout?
Check out my free Shed Design Book here:
Why a “Standard” Shed Size Might Not Fit You
Let’s say you’re considering the commonly chosen 6m x 6m shed for your property, thinking it will comfortably fit a car and some storage. This layout might not be ideal — particularly if it’s slightly too wide for the space you’ve allocated, or not long enough to comfortably fit a vehicle.
For example, a longer vehicle (like a SUV or ute, usually around 5–5.5m long) may just squeeze in, but leave little room to move or store tools behind it. That can become frustrating if you were hoping for a workbench, shelving, or space to walk around.
A more functional layout for your block might be something like an 8m x 4.5m shed. It’s the same floor area (36m²), but the extended length provides much more breathing room and practical usability — especially if your goal is to combine parking with workspace.
A common trap we see is people trying to stay under the low-risk category with a 6 x 6 shed, only to find it’s not quite enough space to achieve what they actually wanted.
While it’s true that going over the 36m² limit can involve extra steps — such as engaging a building surveyor, submitting plans, and possibly needing a licensed builder — it can often be worth it in the long run.
If you’ve got more room on your site, adding just a couple of extra metres each way can make a huge difference. It creates a far more usable and future-proofed space that truly meets your needs — rather than settling for something that only just works.
Shed Sizes & Council Considerations: The 36m² Rule
While your shed supplier may offer full customisation, your local council might have limits. One of the most common size-related considerations in Tasmania is trying to stay under 36 square metres, which may allow your shed to be classified as Low Risk Work (See our blog on Shed permits and Low Risk Work here).
Examples:
- 6m x 6m = 36m²
- 3m x 12m = 36m²
- 4.5m x 8m = still under 36m²
Staying under this threshold can help reduce red tape, council fees, and the added costs of engaging a building surveyor and a licensed builder to complete the work.
Disclaimer: Eligibility is based on your specific site conditions and must meet criteria outlined in the Director’s Determinations available from the CBOS (Consumer, Building and Occupational Services) website. These include setbacks from boundaries, distances from existing buildings, overlays (like bushfire or heritage zones), and more. Always consult your local council or planning department before making assumptions.
Want a Better Way to Choose Shed Sizes?
At The Shed Guru, I recommend starting with what you actually need — then comparing that with common shed sizes to see where you can save or optimise.
That way, you won’t waste money on something too big, or settle for something too small.
I work with trusted Tasmanian suppliers who:
- Offer full customisation
- Design to suit your block
- Understand local regulations and Tasmanian climate factors
- Provide proper engineering and support
Whether you’re building your first shed or upgrading to something larger, I’ll help you avoid rookie mistakes and get quotes that match your block as well as your wishlist.
Want to Know What These Shed Sizes Cost?
If you’re wondering how these shed sizes translate into cost, check out our dedicated pricing guide here:
Final Word: Custom Shed Sizes Beat Standard
At The Shed Guru, I’m not just here to throw a bunch of shed sizes at you — I’m here to help you make the right decision based on your space, goals, and budget.
I’ve personally vetted shed suppliers across Tasmania who consistently deliver on quality, service, and price. And I make it easy to compare your options, avoid rookie mistakes, and move forward with confidence.
Whether it’s your first shed or your fifth — I’m here to guide you the whole way.
Many people assume standard shed sizes are the easiest or cheapest path — but often, a small change in dimensions creates a much better outcome.
Shed Guru Top Tips
Start with what you need and adjust: Just because a shed is labelled a “standard size” doesn’t mean it’s the best size for your block or purpose. Start with what you actually need, and then explore how it compares to common sizes — you might find a better fit with just a small tweak.
Consider custom 36m² dimensions: I’ve had plenty of clients initially set on a 6 x 6m shed, only to realise that something like 8 x 4.5m actually fits their vehicles and workspace needs far better — especially for longer vehicles like utes and wagons.
Ask the right questions early: Many people assume council rules are rigid, but there’s actually some room to move — especially if you ask the right questions early. A quick phone call to your planning department can save a heap of hassle later on.
Ready to Design the Right Shed for Your Build?
If you’re based in Tasmania, Let us help you compare shed sizes, layouts, and quotes — all from trusted suppliers. With 15 years experience building sheds in Tasmania, we have the knowledge, contacts and experience to make sure you get the best price and the best outcome, without the hassle.
👉 Get My Custom Shed Quote Now
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