Updated October 2026
Illawong grew fast through the 1980s and 1990s, filling the peninsula between the Georges and Woronora rivers with estate housing on winding streets. Two things define concreting here. First, much of that era's concrete is now thirty to forty years old and due for renewal. Second, parts of the area sit on reactive clay soils that swell when wet and shrink when dry, which moves slabs and cracks concrete that was not designed for it.
We are not concreters. We are a referral service that connects you with experienced, insured local concreters who understand clay sites and estate-era housing.
Common concreting jobs in Illawong
Replacing 80s and 90s driveways that have cracked or stepped is constant work, along with repairs to paths and pool surrounds showing the same movement. New slabs for sheds, extensions and granny flats need soil conditions taken seriously, and plenty of owners upgrade to exposed aggregate when redoing paths and patios.
How the process works
Tell us about the job. We pass the details to a local concreter who services Illawong, and they call you back with a quote. The referral is free.
On suspect clay, good concreters talk about the base and the steel before they talk about the finish. Proper compaction, mesh reinforcement and sensible joint spacing are what stop a new slab repeating the old one's cracks. For structural slabs, an engineer's design to the soil classification is the standard approach.
What concreting costs in Illawong
As a guide, plain concrete typically costs around $75 to $150 per square metre laid, exposed aggregate and decorative more. Extra reinforcement or base work for clay sites can add to that, which is money well spent compared with re-pouring in ten years.
In NSW, residential concreting work worth more than $5,000 (labour and materials, including GST) must be done by a licensed contractor. Most driveway replacements will qualify, so sight the licence and insurance.
Frequently asked questions
Why did my original driveway crack so badly?
Often a mix of age, minimal reinforcement by modern standards and reactive clay movement underneath. A new slab built for the soil should perform far better.
Do I need a soil test before a slab?
For structural slabs such as a granny flat, yes, the engineering is based on the soil classification. For a simple path it is usually unnecessary.
Is crack filling worth doing on clay?
As a hold-over, yes. But if the ground keeps moving, filled cracks reopen. The local concreters we work with will say plainly whether repair or replacement makes sense.
Nearby, we also cover Alfords Point and Menai.