The cost of a concrete shed or garage slab in Western Sydney can vary significantly depending on the size, design, and site conditions.
Unlike smaller jobs like patios, shed and garage slabs can range from small garden shed bases right through to large garages and farm sheds, which creates a wide variation in cost.
Every slab is custom-built based on the structure going on top, the ground conditions, and the access to the site.
Why This Guide Is Different
This guide is based on real-world experience installing shed and garage slabs across Western Sydney.
Important Note on Pricing
All prices are indicative only and exclude GST.
What Affects the Cost
Type of Structure
- Small garden sheds are basic with no engineering drawings.
- Larger sheds and garages often require engineered slabs, footings, beams or piers. Size of the Slab
- Small shed: 10–20m²
- Single garage: 20–30m²
- Double garage: 30–50m²+
- Large sheds: 100m²+
- Large farm sheds: 200m², 300m², even 500m² or more
Excavation & Site Preparation
$500 to $3,000+
Access
Tight access increases labour and cost.
Concrete Pumping
$1,200 to $2,000 per pour
Engineering Requirements
Footings, beams, piers and reinforcement can significantly increase cost.
Slabs must be level, and sloping ground increases work required.
Important Pricing Limitation
We can generally only provide estimates for basic slabs without footings, beams or piers and up to a double garage size.
Concrete Shed & Garage Slab Costs
Small shed slabs:
- $3,500 to $4,000+
Garage slabs:
- $160 to $200 per m² base
- $280 to $320 per m² all up
Large shed slabs:
- Too much variation to provide an accurate estimate.
Finishes
- Steel trowel finish (smooth) is standard.
- Decorative finishes are generally not used.
Get a Quote
Contact Concreting Services NSW for a quote.
