Planning to add a shed to your Perth backyard? You’re probably eyeing that empty space and wondering if you can just go ahead and build, or whether you need to wade through council paperwork first.
Here’s the straightforward answer: it depends on the size. In Western Australia, sheds under 10 square metres typically don’t need a building permit. But there’s a catch – even small sheds need to meet specific safety requirements, and anything larger than 10m² almost always requires approval.
Must-Know Info
- Sheds under 10 square metres: Usually no building permit needed, but must meet height, setback and safety requirements
- Sheds over 10 square metres: Building permit required
- All sheds must comply with fire safety codes (900mm from other structures)
- Maximum height: 2.4 metres from natural ground level
- Floor height: Maximum 500mm above natural ground level
- Always check with your local Perth council – regulations vary by area
The 10 Square Metre Rule
Ten square metres is the magic number in WA. That’s roughly a 3m x 3m shed – enough for garden tools, outdoor equipment, or general storage.
But even if your shed falls under this threshold, it still needs to meet these conditions:
- Be free-standing (not attached to your house)
- Positioned behind your property’s front setback line
- Be no taller than 2.4 metres above the natural ground level
- The floor can’t be raised more than 500mm above ground level
- It must sit at least 900mm away from any other structure to meet fire safety codes
It also needs to be structurally sound and properly anchored so Perth’s strong winds don’t turn it into a projectile. Non-combustible materials like steel are preferred, especially if you’re building close to boundaries.
You’ll also need to manage stormwater properly. Any runoff from your shed’s roof should drain to an approved stormwater system – you can’t just let it sheet onto neighbouring properties.
When You Definitely Need Approval
If your shed exceeds 10 square metres, you’ll need a building permit. This applies to most custom sheds in Perth – workshop spaces, larger storage buildings, or anything designed for specific purposes beyond basic storage.
Here’s where it gets a bit more complex: there’s a difference between a building permit and planning approval, and you might need both.
A building permit ensures your shed meets structural safety standards and the National Construction Code. This is the most common approval type and applies to virtually all sheds over 10m².
Planning approval is separate and only required if your shed doesn’t meet your local residential design codes. This might apply if you’re in a heritage area, conservation zone, or if your shed is unusually large or positioned in an unconventional location.
Different Perth councils have slightly different requirements, which is why checking with your specific local council is essential. A phone call can save you considerable hassle down the track. Our comprehensive Perth building permits guide covers these differences in more detail.
Special Considerations for Perth Properties
Heritage and Conservation Areas
If your property sits in a heritage or conservation precinct, stricter rules apply. You’ll likely need planning approval even for smaller sheds, and there may be requirements around materials, colours, and design to ensure your shed doesn’t detract from the area’s character.
Boundary Placement
While you can technically build right up to your boundary line (provided you meet fire safety requirements), it’s worth talking to your neighbours first. A quick conversation can prevent disputes and maintain good relationships. Most neighbours won’t mind a small shed that doesn’t block their view or sunlight, but it’s courteous to give them a heads-up.
Rural Properties
Got a larger block or rural property? The same basic rules apply, though some rural councils have more flexible planning policies for agricultural sheds. You’ll still need approval for larger structures, but you might have more leeway with placement and size.
What Happens if You Skip Approval?
Building without the required permits isn’t worth the risk. Perth councils can – and do – issue stop-work orders and fines that run into thousands of dollars. Worse, they can order you to demolish an unapproved shed entirely.
There’s also the insurance angle. Most home insurance policies won’t cover damage to or caused by unauthorised structures. If your unapproved shed contributes to property damage during a storm or fire, you’re personally liable for the costs.
And when you eventually sell your property? Buyers and conveyancers will want proof that all structures have proper approval. An unauthorised shed can derail a sale or slash your property’s value. Getting retrospective approval is possible but expensive, time-consuming, and sometimes impossible.
Getting Started: What You’ll Need
If you do need a building permit, here’s what the application process typically involves:
- Detailed plans showing your shed’s dimensions and exact position on your property.
- A site plan marking boundaries, setbacks, and distances to other structures.
- You’ll also need to specify your building materials and provide structural calculations showing the shed can withstand Perth’s wind loads.
Most councils process applications within 10-15 business days, though this varies. Application fees differ by council and shed size, typically ranging from a few hundred to over a thousand dollars for larger structures.
Let Us Handle the Paperwork
At Phoenix Patios, we understand that navigating council regulations isn’t everyone’s idea of fun. That’s why we manage the entire approval process for you as part of our service.
We’ll assess your property, determine exactly what approvals you need, prepare all required documentation, and submit applications on your behalf. We work with Perth councils regularly and know exactly what they require – including the specific quirks of different local councils across the metro area.
Whether you’re weighing up custom vs kit sheds or need a specialised workshop space, we’ll make sure everything’s compliant from day one, so you can focus on planning how you’ll use your new space instead of worrying about paperwork.