Concrete Slabs Sydney
Level, reinforced slabs for houses, sheds, garages, and alfresco areas
A concrete slab is the foundation of nearly every Sydney construction project — from a backyard shed to a new house. Getting the slab right means getting the grade, reinforcement, thickness, and subgrade preparation correct from the start. Cut corners here and you're fixing cracks and movement for years.
About Our Slabs Service
A concrete slab is the foundation of nearly every Sydney construction project — from a backyard shed to a new house. Getting the slab right means getting the grade, reinforcement, thickness, and subgrade preparation correct from the start. Cut corners here and you're fixing cracks and movement for years.
Dominate Concrete pours residential and light commercial slabs across Sydney Metro. We supply our own formwork, organise the concrete truck and pump where required, and leave the site clean and level. All residential slabs are poured to comply with AS 2870 — the Australian standard for residential slabs and footings.
Whether you need a simple 20m² shed base in the backyard or a full house slab requiring an engineer's design, we can quote and complete the work end-to-end.
Price Guide
Typical residential slab
Price range for shed bases to alfresco slabs. House slabs require individual engineering and quoting.
Calculate Your Price →Slabs Options We Offer
Every project is different — we match the right specification to your needs and budget.
Shed Base Slab
A flat, level concrete base for Colorbond, timber, or kit sheds. Standard 75–100mm thick, N20 or N25, mesh reinforced. Includes drainage fall and moisture barrier where required.
From $80/m² all-inGarage Floor Slab
100mm N25 concrete with mesh reinforcement and a smooth or broom finish. Designed to handle vehicle weight and the compressive loads of a garage structure above.
From $90/m² all-inAlfresco & Patio Slab
Outdoor entertaining slabs finished to complement the home. Plain float, broom, coloured, or exposed aggregate options available. Includes drainage fall away from the house.
From $100/m² all-inHouse Slab
Waffle pod or stiffened raft slabs for new residential construction. Engineered to site conditions, poured to AS 2870, and coordinated with your building certifier.
Quote required — varies by engineer designCommercial Slab
Thicker reinforced slabs for commercial premises, factories, and warehouses. N32 concrete, rebar or post-tensioned reinforcement, joint design and curing plan included.
Quote required — varies by loading and areaOur Slabs Process
What to expect from the first call to finished product.
Design and assessment — we review the intended use, soil type, and any existing engineering reports to confirm slab specification
Excavation and subgrade preparation — the area is cut to depth, base compacted, and vapour barrier installed where required
Formwork and reinforcement — edge forms set level, mesh or rebar laid to specification with correct chair height
Pour and screed — concrete placed by truck or pump, screeded level, and finished to the required surface texture
Curing and handover — curing compound applied, slab protected for the cure period, site cleaned and inspected before handover
Why Choose Us
Sydney's Trusted Concreters for Slabs
- ✓15+ years installing slabs across Sydney Metro
- ✓Licensed concrete contractor — NSW Builder's Licence
- ✓Fully insured — public liability & workers compensation
- ✓Free site quotes with no obligation
- ✓Real pricing based on current Sydney supplier rates
- ✓On-time scheduling and clean site, guaranteed
Instant Estimate
Concrete Price Calculator — Sydney
Get a real-time concrete cost estimate based on current Sydney Metro supplier pricing. Adjust any field and your concrete quote updates instantly.
e.g. 40 for a standard driveway
Slabs — Frequently Asked Questions
Common questions from Sydney homeowners and builders.
How much does a concrete slab cost in Sydney?
A basic 20m² shed base slab in Sydney Metro costs approximately $2,500–$3,500 including GST. A 36m² garage slab runs $4,500–$6,000. Alfresco and patio slabs with decorative finishes range from $5,000–$9,000 for a typical 30–40m². House slabs require individual quoting based on the engineer's design.
How thick should a concrete slab be?
Standard shed base: 75–100mm. Garage floor or alfresco slab: 100mm. House slab: 100–150mm as per engineer's specification. Thicker is not always better without proper sub-base preparation — a well-compacted base with correctly-placed mesh performs better than a thick slab on a poor base.
Do I need a vapour barrier under my slab?
A vapour barrier (heavy-duty polyethylene sheeting) is required under any slab that will have a finished floor laid on top, or in areas with known moisture. It's standard practice on house slabs and garage floors. We include it wherever the conditions require it.
Can you pour a slab in sections?
Yes — for larger areas or sites with access constraints, we pour in sections with construction joints. We plan the joint layout to minimise visible cracking and ensure the sections are bonded or dowelled correctly.
How long before I can build on the slab?
Light framing can typically begin after 7 days. Steel framing and structural loads should wait until 28 days for full cure strength. Your building certifier and frame supplier will also have specific requirements — we provide a pour date certificate on request.
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Learn more →Shed Base Concrete Sydney
A concrete shed base is one of the most straightforward concrete jobs on a residential property — but it still needs to be done right. An unlevel base causes the shed frame to rack and twist, doors that won't close, and water pooling inside. A slab without a moisture barrier causes rust on tools and fittings, and eventual structural deterioration of the shed floor framing.
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Learn more →Concrete Driveways Sydney
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Learn more →Ready to Start Your Slabs Project?
Call us or send an enquiry and we'll get back within 2 hours with a confirmed quote.