Planning a new shed in Melbourne? The most important part of any shed build is the slab foundation. A properly designed shed slab ensures stability, durability, and compliance with Australian standards. This guide covers the required thickness, reinforcement options, and typical costs of shed slabs in Melbourne (2025).
Shed Slab Thickness Requirements
The thickness of your shed slab depends on the shed’s size and intended use. For small garden sheds, a 100mm thick slab is usually sufficient. For larger sheds or those housing heavy equipment or vehicles, a 125mm–150mm slab may be required.
General guidelines include:
- Small garden sheds – 100mm thick slab with SL72 mesh
- Medium sheds or workshops – 125mm thick slab with SL82 mesh
- Large sheds or farm equipment – 150mm reinforced slab with heavier steel mesh
Reinforcement for Shed Slabs
Reinforcement is essential to prevent cracking and improve load capacity. The most common reinforcement types are steel mesh (SL72 or SL82) and concrete with 25–32 MPa strength. For heavy-duty sheds, thicker reinforcement and additional footings may be required.
Learn more about reinforcement options on our Concrete Slabs service page.
Shed Slab Costs in Melbourne
In Melbourne, shed slabs typically cost between $70–$100 per m² for standard residential use. For heavier loads or thicker slabs, costs can rise to $110–$140 per m². Factors that affect price include site access, excavation requirements, soil type, and the size of the shed.
Average costs:
- Small sheds (up to 10m²): $800–$1,200
- Medium sheds (10m²–20m²): $1,500–$2,500
- Large sheds (20m²+): $3,000–$5,000+
Additional Considerations
When building a shed slab in Melbourne, also consider drainage, council requirements, and the type of shed being installed. Some larger sheds may require engineering approval and certification in line with AS 2870 Residential Slabs and Footings.
Further Reading
Australian Standards (AS 2870 – Residential Slabs & Footings) – https://www.standards.org.au/
Housing Industry Association Shed Guide – https://hia.com.au/
Get a Free Quote for a Shed Slab in Melbourne
At Sturdy Concreter, we specialise in shed slabs across Melbourne’s South East and the Mornington Peninsula. Whether it’s a small backyard shed or a large farm workshop, we’ll provide a durable, compliant slab tailored to your needs. Contact us today for a free, no-obligation quote.