Cost Guide
Polished Concrete Cost in Australia (2026 Guide)
By Mount Gambier Concrete · 11 July 2026
Quick answer
As a 2026 Australian guide, grind and seal concrete costs roughly $50–$100 per square metre, and full mechanically polished concrete around $100–$200 per m² depending on the level of polish, aggregate exposure and whether it's a new or existing slab. Larger, simpler floors sit at the lower end. Always get a written quote after the slab is assessed.
Polished concrete has become one of the most sought-after floor finishes in Australian homes and businesses — seamless, low-maintenance, allergen-free and genuinely hard-wearing. If you’re weighing it up, the key question is what it costs, and how the different finishes compare.
This guide covers polished concrete costs in Australia in 2026, the difference between grind & seal and full polishing, and what changes the price. It’s especially relevant on the Limestone Coast, where polished concrete pairs neatly with the region’s homes and businesses — from new builds around Mount Gambier to shopfronts and sheds out toward Naracoorte, Penola and the coast at Robe and Beachport.
Polished concrete cost per square metre
Polished concrete is priced per square metre, and the finish level is the main driver:
| Finish | Indicative cost |
|---|---|
| Grind & seal | $50 – $100 per m² |
| Full mechanical polish | $100 – $200 per m² |
| Premium / high-exposure polish | $150 – $250+ per m² |
Larger, simpler, open floors sit at the lower end because the work flows efficiently; small, cut-up rooms with lots of edges cost more per square metre.
Worked example: what a floor might cost
Say you have an open-plan living, kitchen and dining area of about 80 m² on a new slab. Here’s roughly how the finish choice changes the total:
| Finish | Rate | 80 m² total (indicative) |
|---|---|---|
| Grind & seal | $75/m² | ~$6,000 |
| Full mechanical polish | $150/m² | ~$12,000 |
| Premium high-exposure polish | $200/m² | ~$16,000 |
Shrink that to a cut-up 25 m² of hallways and a laundry with lots of edges, doorways and cabinet kickboards, and the per-metre rate climbs — there’s more careful edge work and less open floor to move across efficiently. This is why a whole-home floor often prices better per square metre than a single small room, and why it’s worth quoting the whole job at once if you’re planning polished concrete throughout.
Grind & seal vs full polishing — what’s the difference?
This is the single biggest factor in cost, so it’s worth understanding:
- Grind and seal grinds the surface back, then applies a protective sealer or coating. It’s faster, cheaper, and gives a clean, hard-wearing, easy-clean finish. Ideal for garages, sheds, workshops and budget-conscious interiors.
- Full mechanical polishing grinds and polishes the concrete through progressively finer diamond grits to a genuinely smooth, subtly reflective surface. It costs more but delivers the premium, low-maintenance floor most people picture when they think “polished concrete.”
Neither is “better” — it depends on your budget, the look you want, and where the floor is.
What changes the price
New slab vs existing slab
Polishing a new slab poured for the purpose is often the cleanest path to a great result. Polishing an existing slab can be very cost-effective — but the final look depends on the slab’s condition, flatness and what aggregate is in it. We assess the slab first and tell you honestly what finish is achievable.
Level of aggregate exposure
A “cream” or “salt-and-pepper” finish (little to no stone showing) differs in look and process from a full “exposed aggregate” polish that reveals the stone. More exposure generally means more grinding work.
Sheen level
Matte, satin and high-gloss finishes involve different amounts of polishing. A higher gloss takes more passes and costs a little more.
Size, access and prep
As with any floor, larger open areas are more efficient per square metre. Repairs, crack filling and levelling of an existing slab add to the cost. See why concrete cracks if your existing floor has issues.
Colour, dyes and decorative extras
Plain grey concrete polishes up beautifully, but you can also add a dye or work with a coloured slab for a warmer or more dramatic tone. Some projects incorporate decorative aggregate, glass or feature cuts. Each of these adds to the cost and the labour, so they’re worth deciding on early rather than mid-job.
The polished concrete process, step by step
Understanding what actually happens helps explain where the cost goes and why full polishing costs more than grind & seal:
- Assessment. We look at the slab’s condition, flatness, aggregate and any cracks, and tell you honestly what finish is realistic.
- Preparation. Any coatings, adhesives or old flooring are removed, and cracks or holes are repaired and filled.
- Grinding. Coarse diamond tooling opens up the surface and, depending on the look you want, exposes little (cream), some (salt-and-pepper) or a lot (full aggregate) of the stone.
- Densifying. A chemical densifier is applied to harden the surface so it takes a polish and resists wear.
- Polishing (full polish only). Progressively finer diamond grits refine the surface up to the target sheen — matte, satin or high gloss.
- Sealing / guarding. A penetrating sealer or topical guard protects against stains and marks.
Grind & seal stops well short of that grit progression — it grinds, then seals or coats — which is exactly why it’s faster and cheaper. Full mechanical polishing invests the extra days in densifying and multiple polishing passes, and that labour is most of the price difference.
Local considerations on the Limestone Coast
A few regional factors are worth knowing before you commit. On an existing slab around Mount Gambier, the free-draining limestone ground is generally kind to floors, but any slab poured directly on ground without a moisture barrier can suffer from rising damp, which affects sealers and coatings — we check for this before quoting. Near the coast at Port MacDonnell, Robe, Beachport and Kingston SE, salt and humidity make a well-chosen sealer and regular re-guarding more important for keeping the finish looking its best. For new builds inland on reactive terra rossa soils at Naracoorte, Penola or Coonawarra, the same movement that can crack a poorly built slab also shows in a polished floor, so a well-engineered concrete slab underneath is the foundation of a good polished result. If you’re pouring a new slab specifically to polish, tell your concreter up front so the mix, finish and joint layout suit polishing.
Is polished concrete worth it?
Over the life of the floor, polished concrete is one of the most economical options — there’s no carpet to replace, no tiles to re-grout, no coating to redo every few years. It resists wear, doesn’t harbour dust or allergens, works beautifully with underfloor heating, and cleans with a mop. For many homes and businesses, the upfront cost is offset by decades of near-zero maintenance.
What it costs to live with
The number that surprises people is the running cost, because there almost isn’t one. A polished concrete floor is cleaned with a dust mop and the occasional damp mop — no carpet shampooing, no re-grouting, no re-coating every few years like a timber or epoxy floor. Every so often (how often depends on traffic) the sealer or a topical guard is refreshed to keep it performing, which is a small, occasional job rather than a recurring bill. For a busy household, a shed or a shopfront, that near-zero maintenance is a large part of the value.
It’s worth being realistic about two things, though. Polished concrete is hard and cold underfoot, which is why it pairs so well with underfloor heating but can suit some rooms better than others. And on an existing slab, the final look is partly out of anyone’s hands — the colour and the amount of stone that shows depend on what was poured years ago. That’s exactly why we assess the slab before quoting rather than promising a finish we can’t guarantee.
Getting an accurate number
Because the price swing between a simple grind & seal and a high-exposure full polish is so wide, the biggest thing you can do for your budget is be clear about the finish you actually want before comparing quotes. A quote for a matte grind & seal in a garage and a quote for a satin, salt-and-pepper polish in a living area are answering different questions — make sure you’re comparing like with like. If your existing floor has cracking or level issues, factor in repair work, and ask for it to be itemised separately so you can see it.
Common questions
Grind & seal or full polish — which should I choose? For a garage, shed, workshop or budget interior, grind & seal gives a clean, hard-wearing, easy-clean floor for less. For a living area where you want that smooth, subtly reflective, premium look with minimal upkeep, full mechanical polishing is worth the extra. Neither is “better” — it’s about the room and the budget.
Can any old slab be polished? Most can, but the result depends on the slab’s condition, flatness and what aggregate is in it. A slab in poor condition may need repair first, or may suit a grind & seal better than a high-gloss polish. That’s why we assess before quoting rather than promising a finish sight-unseen.
Is polished concrete slippery? A polished floor can be smooth, but sealers and finishes can be specified for slip resistance, and grind & seal finishes are naturally more textured. We’ll match the finish to the room — kitchens, entries and wet areas get different treatment to a lounge.
Does it crack? Polished concrete is still concrete, so existing control joints remain visible and hairline shrinkage cracks can occur — many people consider these part of the material’s character. A well-built slab keeps this to a minimum. See why concrete cracks.
How often does it need re-sealing? It depends on traffic and the finish, but re-guarding is an occasional job rather than a regular expense — far less often than re-coating a timber or epoxy floor.
Get a quote for your floor
Because so much depends on your slab and the finish you want, a written quote after we’ve seen the floor is the only accurate number. We’ll advise on grind & seal vs full polishing, what’s achievable on your slab, and quote a fixed price.
Thinking about a polished floor? Call 0400 123 456 or get a free quote for polished, honed or grind & seal concrete — across Mount Gambier and the Limestone Coast.