ConcreteslabcostinAdelaide(2026)
A 30m2 residential shed slab in Adelaide runs $4,800 to $8,500. A 60m2 garage slab: $7,500 to $13,500. Footings depend on soil class (AS 2870). Reactive clay sites in the north-east cost more because the footings carry more.
Slab cost by size and use
| Slab type | Size | Low | High |
|---|---|---|---|
| Shed slab (standard) | 30m2 | $4,800 | $8,500 |
| Single garage slab | 36m2 | $5,500 | $9,500 |
| Double garage slab | 60m2 | $7,500 | $13,500 |
| Workshop slab (heavy use) | 60m2 | $9,000 | $16,000 |
Class S soil, standard formwork, SL72 mesh, 25 MPa. Reactive clay sites add for engineered footings. 2026 Adelaide rates.
Soil class and footing cost in Adelaide
Adelaide's soil class profile varies by suburb. The footing design required by AS 2870 - and its cost - changes significantly between Class S and Class M.
| Soil class | Common Adelaide areas | Footing premium |
|---|---|---|
| Class A/S | Coast, Charles Sturt, West Torrens | Standard (base rate) |
| Class M | Mitcham hills, Tea Tree Gully, parts of Salisbury | +$1,500 to $4,000 |
| Class H | Parts of Playford, outer north | +$3,000 to $8,000 |
Related guides and tools
Concrete slabs service - AS 2870 footing design and slab specs explained.
How to choose a concreter - what an itemised slab quote must contain.
BWC licensing in SA - when your slab project needs a licensed concreter.