$110 to $150 per m², supplied and laid. A guide until the block is measured; the written quote holds.
The blocks of the outer east were sized in an era when a back shed was assumed, and most of them still have one, or are about to get a better one. The slab decides how the shed ages: poured level, sized to the load, and proud enough of the ground that water runs away from the door instead of under it.
Specified by the load
A garden shed holding the mower and the bikes needs 100mm of concrete on SL72 mesh. A garage, carport or workshop, where a car or a lathe will sit, needs 125mm on SL82. The difference costs little on the day and everything a decade later, which is why the thickness and mesh are written into the quote against the published specification rather than left to whoever turns up.
Set out for the shed, not the other way round
The slab is set out to the shed maker’s base dimensions, checked square on the diagonals, with hold-down positions considered before the pour. On Croydon’s sloped blocks the slab is benched into the fall and the uphill edge drained so the shed stays dry through winter.
What it costs
Shed and garage slabs run $110 to $150 per square metre supplied and laid. Breaking out an old slab first adds $35 per square metre through the removal and replacement service. Treat every rate as a guide until the block is measured; the quote written after the site measure holds. The cost guide sets out the drivers, and a path to the shed poured on the same day shares the day’s set-up cost.
Where we pour shed and garage slabs
Croydon, Croydon Hills, Croydon North, Croydon South, Heathmont, Ringwood and nowhere else: one council, known inside out.