Slabs, footings & structure

Shed and granny flat slabs: cost and requirements

A typical 20 m² shed slab costs about $1,500–$3,500 in Australia (GST incl.).

603 businesses listedUpdated October 2026
In short

A typical 20 m² shed slab costs about $1,500–$3,500 in Australia (GST incl.). Granny flats are dwellings, so their slab is engineered like a house slab.

What shed & granny flat slabs involves

  1. Check council rules and the shed kit's slab drawing
  2. Level the pad and compact a base
  3. Form edge beams or thickenings where the shed frame bolts down
  4. Place mesh and bar chairs, pour and finish
  5. Cure before bolting the shed down
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How much shed & granny flat slabs costs

Small slabs carry fixed costs (truck minimums, setup), so the per-m² price is higher than for big slabs. Access for the truck matters: barrowing or a pump adds roughly $300–$800.

Price ranges in Australia (GST incl.)

Source: whatsthedamage.com.au, Concreting cost Australia 2026 (verified October 2026); whatsthedamage.com.au, Concreting cost Sydney 2026. Prices include GST. Checked October 2026.

Plain concrete slab: typical price per m² by state

NSW$126
VIC$116
QLD$110
WA$116
SA$101
TAS$100
NT$110
ACT$120
National typical price × capital-city price index (October 2026). Click a state to open the calculator.

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Before you hire

  • Use the shed manufacturer's slab drawing – it shows edge beams and bolt positions
  • Ask for the slab to be poured square and level; kit sheds don't forgive errors
  • Check whether the shed needs council approval before pouring
  • For a granny flat, get engineered drawings first

Standards and approvals

Small garden sheds are often exempt from approval if they meet size and setback limits; larger sheds and granny flats need approval. Granny flat slabs follow AS 2870 like a house. Concreting for homes is licensed building work in most states. In NSW a contractor licence from NSW Fair Trading is needed for residential work over $5,000 (labour and materials, incl. GST); in Queensland a QBCC licence is needed for work over $3,300; in Victoria, domestic building work over $10,000 must be done by a registered builder (Building and Plumbing Commission). Check the licence number on the regulator's public register before paying a deposit.

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Who does shed & granny flat slabs

603 businesses in the directory list this service; 132 of them mention it on their own website (the quote is on each business page).

New South Wales 148 businesses

All concreters in New South Wales

Victoria 16 businesses
  • Concreter
    Hume Concreting MelbourneShepparton, VIC
    • Concrete driveways
    • Driveway crossovers
    • Concrete paths & footpaths
  • Concreter
    Salcrete Concreting Pty LtdCaroline Springs, VIC
    • Concrete driveways
    • Driveway crossovers
    • Concrete paths & footpaths
  • Concreter
    Ymc ConcretingDandenong, VIC
    • Concrete driveways
    • Driveway crossovers
    • Concrete paths & footpaths

All concreters in Victoria

Queensland 159 businesses

All concreters in Queensland

Western Australia 106 businesses

All concreters in Western Australia

South Australia 87 businesses

All concreters in South Australia

Tasmania 37 businesses
  • Concreter
    Aurelia Concrete SolutionsHobart, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps
  • Concreter
    JP Concreting TASKingston, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps
  • Concreter
    Hobart Concreting SolutionsHobart, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps
  • Concreter
    Supreme Concreting TasmaniaDeloraine, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • House slabs
  • Decorative & resurfacing
    Volcanic CreationsHobart, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • House slabs
  • Concrete supplier
    Bosveld ConcretingLaunceston, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • Shed & granny flat slabs
  • Concrete supplier
    DuggansHobart, TAS
    • House slabs
    • Shed & granny flat slabs
    • Footings, foundations & columns
  • Builder, civil or landscaping
    Con-Tek Integrated ServicesHobart, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • Shed & granny flat slabs
  • Builder, civil or landscaping
    Cowen ContractingHobart, TAS
    • Concrete driveways
    • Driveway crossovers
    • Concrete paths & footpaths
  • Builder, civil or landscaping
    Knockout Concreting & Excavation Pty LtdDeloraine, TAS
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps

All concreters in Tasmania

Northern Territory 17 businesses

All concreters in Northern Territory

Australian Capital Territory 33 businesses
  • Concreter
    A.b.concreter Pty LtdDickson, ACT
    • Concrete driveways
    • Concrete paths & footpaths
    • House slabs
  • Concreter
    ACT ConcreteMitchell, ACT
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps
  • Concreter
    Ace Concreting CanberraBelconnen, ACT
    • Concrete driveways
    • Concrete paths & footpaths
    • Shed & granny flat slabs
  • Concreter
    Canberra Concreting SolutionsBelconnen, ACT
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps
  • Concreter
    Top Notch Canberra ConcreteBelconnen, ACT
    • Concrete driveways
    • Concrete paths & footpaths
    • Car parks & loading bays
  • Concreter
    Pinzon ConcreteWatson, ACT
    • Concrete driveways
    • Shed & granny flat slabs
    • Commercial slabs
  • Polished & epoxy floors
    Canberra Polished ConcreteGowrie, ACT
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps
  • Builder, civil or landscaping
    Alford YardworksBelconnen, ACT
    • Concrete driveways
    • Concrete paths & footpaths
    • Concrete steps & ramps

All concreters in Australian Capital Territory

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Common questions

How thick should a shed slab be?

100 mm with mesh is common for garden sheds, with thickened edges where the frame is bolted. Garages and workshops with vehicles often use 100–125 mm or the kit's specification.

Do I need council approval for a shed slab?

It depends on the shed's size, height and position. Small sheds are often exempt development; check your council's rules.

How much does a 6 x 6 m slab cost?

At $75–$150 per m² for plain concrete, 36 m² works out to roughly $2,700–$5,400 before removal, pumping or extra thickness.

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