Exposed Aggregate vs Plain Concrete: Which Is Right for Your Perth Driveway?
Exposed Aggregate vs Plain Concrete: Which Is Right for Your Perth Driveway?
It's the most common question we get on a driveway site visit: should I go exposed aggregate or just do it in grey?
The honest answer isn't "always go exposed" or "grey is fine." It depends on a few things worth thinking through before you commit — and we'd rather you understand the trade-offs clearly than make a $10,000 decision based on incomplete information.
Here's how we work through it with Perth homeowners.
What's the actual difference?
Let's start with what doesn't differ, because this surprises people.
Structurally, there is no difference. Both finishes use the same type of concrete — poured at the same depth, with the same reinforcement, cured the same way. The slab underneath is identical. The structural performance is comparable.
The difference is entirely in the surface.
Plain grey concrete is poured and finished with a steel trowel or broom, leaving the cement paste on the surface intact. The result is a smooth or lightly textured grey finish.
Exposed aggregate uses a specially selected concrete mix containing decorative stones — river pebbles, crushed granite, quartz or custom decorative blends — mixed into the concrete before it's poured. After the slab reaches the right stage of set, the top layer of cement paste is removed with a high-pressure wash, exposing the stones within. The result is a textured, multi-tonal, architectural surface with genuine visual depth.
Same structural product underneath. Very different outcome on top.
Why exposed aggregate costs more — and what you're actually paying for
The price difference between grey concrete and exposed aggregate is real — roughly 50 to 80 per cent more per square metre at current Perth rates. But it's not arbitrary.
Two things drive the gap:
The material is significantly more expensive. Exposed aggregate mixes are architectural concrete products. The decorative aggregate — the stones that give the finish its character — costs three to four times more to supply than the plain aggregate in a standard grey mix. That cost flows directly into the per-metre price, before any installation difference is considered.
The job requires multiple returns to site. A plain grey driveway is essentially a single-stage pour: arrive, place, finish, leave. An exposed aggregate driveway involves four stages:
The initial concrete pour
A return visit for the pressure wash exposure
A return for the acid wash
A return for sealing
That's three additional site visits on top of the grey concrete process — each with the associated labour, equipment and fuel. When you understand what's actually involved, the price difference makes complete sense.
The case for exposed aggregate
There are real, defensible reasons to spend more.
It changes how your home reads from the street. A plain grey driveway is functional. An exposed aggregate driveway — in the right aggregate blend — can make a home look genuinely premium. It adds a layer of architectural quality that grey concrete simply can't match, and that quality reads immediately from the kerb.
It typically returns value at sale. Perth real estate agents consistently note that premium driveway finishes contribute to kerb appeal and perceived property value. This is harder to put a precise number on, but it's a consistent observation from people whose job it is to know.
It ages better. Grey concrete, after years of UV and heat exposure, can discolour unevenly and look tired. Exposed aggregate — resealed on schedule every three to five years — holds its look for decades. The textured surface also conceals minor surface wear that would be plainly visible on a smooth finish.
Your neighbourhood sets the baseline. In many established Perth suburbs — Floreat, Claremont, Applecross, Mt Pleasant, Cottesloe — exposed aggregate driveways are the norm. If comparable homes around you have decorative driveways, a plain grey one will read as the outlier. That matters at sale and it matters to you every time you pull in.
The case for plain grey concrete
Grey isn't the wrong answer. There are situations where it's clearly the right one.
Budget is the honest reality for many homeowners. If the budget is fixed and the choice is between a properly installed grey driveway now or cutting corners on an exposed aggregate one to make the numbers work, grey wins. A well-installed plain driveway — correct thickness, correct reinforcement, correct mix — will outperform a poorly installed decorative one every time. The concrete underneath matters more than the finish on top.
The home may not justify the upgrade economically. Putting an exposed aggregate driveway on a property in a suburb where no comparable homes have decorative driveways, and where the property value doesn't support premium finishes, is a decision with uncertain return. The upgrade cost is real; the value gain depends on the specific market.
Grey is a simpler job. Fewer site visits, fewer things that need to go exactly right on a specific day. For a functional driveway without design ambitions, grey does the job well.
The question most Perth homeowners don't think to ask
Before deciding on finish, look at your street.
What do the driveways around you look like? If the majority of comparable homes in your suburb have exposed aggregate driveways, the value case for matching them is stronger. If grey is the norm, exposed aggregate may add appeal but won't necessarily add proportional value.
This isn't about copying your neighbours. It's about understanding the baseline your home is being compared against — at sale, in the eyes of visitors, and in your own daily experience of the property.
We'll always give you our honest read on this when we visit. If grey makes sense for your situation and your street, we'll tell you that.
What about honed concrete?
Honed concrete is worth knowing about as a third option, even though it's less common for driveways in Perth.
It's a smooth, refined matte finish — more polished in appearance than exposed aggregate but without the high gloss of fully polished concrete. It's achieved by mechanically grinding the surface with specialised diamond equipment, which is why it sits at the premium end of driveway pricing.
For driveways specifically, honed is less popular than exposed aggregate in Perth — partly cost, partly that the smooth surface provides less texture underfoot than exposed aggregate. Where honed comes into its own is for high-end properties where it's part of a broader architectural statement, or where the outdoor concrete connects with a honed interior floor.
If you're interested in exploring it, our honed concrete page covers the full detail.
The honest truth about regret
In years of laying driveways across Perth, the direction of regret runs one way.
Homeowners who choose exposed aggregate almost never wish they'd gone grey. Homeowners who choose grey — particularly when they were genuinely weighing up exposed aggregate at the time — sometimes do. Especially as the finish ages, and especially when they see exposed aggregate driveways in their street.
That's not a sales pitch. It's a pattern worth knowing before you make the call.
Frequently asked questions
Can I have exposed aggregate on part of my driveway and grey on the rest? Yes — it's common to use exposed aggregate for the main visible driveway area and grey for less visible sections behind a fence or gate or where the footpath and crossover are these are often done in grey concrete and can be an excellent cost saving option. The transition needs to be planned carefully for a clean edge. We do this regularly.
Does exposed aggregate need more maintenance than grey concrete? It requires periodic resealing every three to five years to maintain colour and stain resistance. Grey concrete doesn't strictly require sealing (though it benefits from it). Day-to-day cleaning and care is similar between the two.
What aggregate colours and stones are available in Perth? The range is broad. Pale limestone creams and whites suit coastal and Hamptons-style homes. Charcoal and granite blends suit modern architectural builds. Warm honey and quartz tones complement traditional brick homes. Mixed pebble blends give a more natural, organic look popular for pool surrounds. We refer clients to our supplier partners such as Boral, Limecrete, Heidelberg Materials, Hanson and WA Premix. Popular mixes are the Jarrah white cement and coral white. Our suppliers reach all of the Perth metro area in Bibra Lake, East Perth and Osborne Park so you can see and feel samples in person before committing to anything.
Will exposed aggregate stain? Correctly sealed exposed aggregate resists most household staining. Unsealed or poorly maintained surfaces are more vulnerable. Staying on top of the resealing schedule is the main factor in long-term stain resistance.
Can you match existing exposed aggregate on my property? Where there's existing exposed aggregate, we can take a sample to our suppliers and work toward the closest available match. Perfect colour matching across separate pours is difficult — minor variation is normal — but a close visual match is achievable in most cases.
Colacrete is a Perth-based concrete specialist. Get in touch for a free quote and an honest recommendation on which finish suits your home.