Cost of a Garage Slab in Melbourne
A garage slab looks like a small, simple project, but several real factors affect its price beyond just the square metreage. Here’s what genuinely drives the cost.
Size and Scope
As with any slab, size affects total cost, though smaller slabs like a single or double garage often have a higher cost per square metre than a larger house slab, since fixed costs (site setup, mobilisation) are spread over a smaller area. This is worth understanding when comparing a garage slab quote against a per-square-metre figure quoted for a much larger project.
Vehicle Load Requirements
See our garage slabs explained guide for the full detail, but in short: a garage slab intended only for standard passenger vehicles costs less than one designed for heavier vehicles, a car hoist, or workshop equipment, since the latter needs additional thickness and reinforcement. Being clear about intended use upfront is important for both accurate pricing and getting a slab that actually performs for your needs.
Integrated vs Standalone Garage
A garage slab built as part of a new house slab is typically priced as part of that overall project, with the garage area simply an engineered section of the larger design. A standalone garage, built separately, is its own foundation project requiring its own site assessment, soil report consideration and engineering — generally at a different cost structure to an integrated garage area.
Site Access and Preparation
Site access for concrete trucks or pumps, and any excavation or site preparation needed before the slab itself can be poured, both affect price — a straightforward, accessible site is more cost-effective than one requiring difficult access solutions or significant preparatory earthworks.
Finish Choice
A standard trowelled finish is the most cost-effective option and entirely adequate for most garage use. Sealed or coated finishes add cost but offer easier cleaning and a more finished appearance, particularly relevant where the garage doubles as a workshop or more frequently used space.
Getting an Accurate Quote
The most useful thing you can do before requesting a garage slab quote is be clear about intended vehicle use and any special requirements (hoist, workshop equipment), and allow a proper site assessment rather than expecting an accurate price from dimensions alone. We assess every garage slab project in person to ensure the quote reflects your actual site and requirements.
Recently Completed Projects
We complete residential and commercial concrete, excavation and foundation projects across Melbourne every week. Explore our project gallery to see the range of work we deliver.
Frequently Asked Questions
Is a garage slab cheaper per square metre than a house slab?
Often the opposite — smaller slabs like garages can have a higher cost per square metre since fixed setup costs are spread over less area.
Does a car hoist add much to garage slab cost?
Yes, typically, since the slab needs additional thickness and reinforcement to handle the hoist’s specific point loads — this should be factored in from the design stage.
Is a standalone garage slab more expensive than one built with the house?
It can involve additional cost as its own separate foundation project (own site assessment and engineering), compared to being priced as part of a larger house slab project.
Does site access affect garage slab pricing much?
Yes — difficult access can require different equipment or additional labour, meaningfully affecting the price compared to a straightforward, accessible site.
What's a reasonable finish for a standard garage?
A standard trowelled finish is cost-effective and entirely adequate for typical garage use; sealed or coated finishes add cost for easier cleaning and a more finished look.
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