Restoring an existing polished floor - grinding and polishing it back to a fresh finish - typically costs between $60 and $100 per m2 + GST in Auckland. For most homes, that puts a full living area restoration somewhere between $4,000 and $7,000 + GST.
Restoration Cost at a Glance
The most important thing to understand about pricing is that restoration and renovation are different jobs with different price brackets.
| Job type | What it is | Price per m2 (+ GST) |
|---|---|---|
| Rebuff only | Light buff to restore sheen on a floor in good condition | $30-$50, every 3-5 years |
| Restoration (regrind) | Regrinding an existing polished floor to remove wear, scratches, or dullness | $60-$100 |
| Renovation (carpet/tile removal + polish) | Carpet or tile removal then grinding and polishing a raw slab | $90-$120 |
| First-time polish - average residential | Raw slab, 50-70m2 | ~$100 |
| Minimum charge | Any job under 20m2 | $2,250 flat rate |
All prices are + GST. The minimum charge of $2,250 + GST applies to areas under about 20m2 regardless of job type. Exact cost depends on floor condition, depth of regrind required, floor size, and access.
Restoration - regrinding a floor that has already been polished before - is generally less costly than polishing a raw slab for the first time. The concrete has already been opened up and processed. The question is how much material needs to come off to get it looking good again.
What Pushes the Cost Up or Down
Not every restoration job lands at the same price within that $60-$100 range. Here is what moves the number.
Floor condition - this is the biggest variable. A floor that is simply dull and has lost its sheen needs only a light regrind to restore clarity. A floor with deep scratches, staining, or surface damage needs more material removed before polishing can start. More passes, more time, higher cost.
Depth of regrind required. A shallow regrind - one that removes just the surface layer - is faster than a deep cut that takes the floor back to fresh aggregate exposure. Deep regrinding is sometimes needed when surface damage goes beyond the superficial layer, or when the floor has been resealed with a topical product that needs to be cut through.
Floor size. As with all concrete work, larger areas are more efficient. The $60-$100 range applies most comfortably to reasonably sized spaces. Small areas under 20m2 hit the minimum charge regardless of the job type.
Access. A clear, empty room is straightforward. A furnished home where machinery needs to be worked around furniture, walls, and cabinetry takes longer and costs more.
Number of cracks or joint repairs. If cracks have opened up or control joints have deteriorated since the floor was first polished, these need to be filled and repaired before regrinding. Repair work adds time and cost on top of the base restoration rate.
Restoration vs a Rebuff - When Each Makes Sense
Before committing to a full restoration, it is worth understanding whether your floor actually needs one.
A rebuff - a light polish to restore the surface sheen - costs $30-$50 per m2 + GST and is appropriate every 3-5 years on a floor in good condition. If your floor looks dull but the surface itself is intact - no scratches visible when you look from a low angle, no rough patches underfoot - a rebuff is likely all it needs. This is normal, planned maintenance rather than a repair.
Restoration (regrinding) is needed when the surface itself is compromised. This includes visible scratches that don't buff out, patches where the finish has worn unevenly, discolouration that runs below the surface, or areas where damage from furniture, pets, or dropped objects has physically marked the slab. A regrind removes material to get below the damage layer, then re-polishes from there.
If you are not sure which category your floor falls into, the honest answer is to get someone on site to look. We carry out a site assessment before every job - it takes a few minutes and tells you clearly which approach makes sense and what it will cost.
A common mistake is applying a topical sealer or a "concrete polish" product from a hardware store over a dull floor. These can temporarily mask dullness but they do not fix the underlying surface and can create additional layers that need to be cut through later, adding cost to any future restoration.
Restoration vs a First-Time Polish - How the Costs Compare
If your home has an existing polished floor that needs work, it may be tempting to compare the restoration cost against simply starting fresh. Here is how those two scenarios stack up.
Restoration of an existing polished floor: $60-$100 per m2 + GST. The floor has been polished before, so the work starts from an already-processed surface. The grind goes back in to remove wear, then works back out through the polishing stages.
First-time polish of a raw residential slab (50-70m2): around $100 per m2 + GST. This starts from raw concrete that has never been ground and polished, and may include prep work like crack filling, old adhesive removal, or levelling.
Renovation (carpet or tile removal, then polish): $90-$120 per m2 + GST. This includes the preparation work to remove previous floor coverings and deal with any residue or surface damage left behind, then grind and polish from the raw concrete.
In most cases, restoring an existing polished floor is the most cost-effective path. You are not starting from scratch - the floor already has its character and its aggregate story. The grinding and polishing brings it back to where it was.
What to Expect From a Restoration
A mechanically polished concrete floor that has been well maintained can last 20+ years with good maintenance. Over that time, you should expect:
Years 1-5: The floor looks and performs as intended. Normal cleaning (damp mop) is all that's required.
Years 3-5 onward: A periodic rebuff ($30-$50 per m2 + GST, every 3-5 years) restores the sheen and keeps the surface performing well. This is planned maintenance, not a repair.
When the surface is genuinely worn: A full restoration brings it back. Done properly, the restored floor is structurally the same as it was when first polished - mechanically polished concrete has no coating to replace, because the finish is the concrete itself. A regrind removes the worn surface layer and re-polishes the fresh concrete underneath.
This is quite different from a coated floor system, where the coating eventually fails and needs to be stripped and reapplied. With mechanically polished concrete, the floor material itself is the finish. It dulls with use - similar to timber or stone - but regrinding restores it cleanly.
Want to understand more about what the restoration process actually involves on site? Read our guide on how to restore a polished concrete floor.
Getting an Accurate Quote
Because the $60-$100 restoration range is driven by the floor's condition, there is no substitute for a site visit before quoting. We look at:
- How the surface responds to a test grind in a small area
- How deep the damage layer runs
- Whether crack or joint repairs are needed
- The floor size and layout complexity
- Access
That on-site assessment tells us which end of the range your job sits at, and gives you a firm number before any work starts.
We also offer a 10% price beat guarantee - if you have a lower written quote from a licensed Auckland concrete polisher, we will beat it by 10%.
For background on what the full grinding and polishing service covers - including both first-time polishes and restoration work - read more about our concrete grinding and polishing service.
For a broader comparison of polished concrete costs including first-time polishes, large commercial floors, and outdoor work, see our main polished concrete cost guide for Auckland.
Frequently Asked Questions
Q: How much does it cost to restore a polished concrete floor in Auckland?
Restoration of an existing polished floor - regrinding and repolishing a floor that was previously mechanically polished - typically costs $60-$100 per m2 + GST. The minimum charge is $2,250 + GST for areas under about 20m2. Where your job sits within that range depends on the condition of the floor, the depth of regrind required, and access.
Q: What is the difference between a rebuff and a full restoration?
A rebuff ($30-$50 per m2 + GST, recommended every 3-5 years) polishes the existing surface to restore sheen. It is planned maintenance for a floor in good condition. A restoration involves actually regrinding the floor - removing material to get below the worn or damaged layer, then re-polishing. Rebuffing cannot fix scratches, uneven wear, or surface damage that has cut into the concrete.
Q: Is restoring a polished floor cheaper than polishing a new slab?
Usually, yes. A restoration ($60-$100 per m2 + GST) is generally less expensive than a first-time polish on a residential slab (~$100 per m2 + GST), because the floor has already been processed and the preparation work is less. If the existing floor has significant damage or requires deep regrinding, the gap narrows, but restoration is still typically the more cost-effective option.
Q: How often does a polished floor need to be restored?
A well-maintained mechanically polished concrete floor can go 20+ years with good maintenance before a full restoration is needed. Regular rebuffs significantly extend that window. Rebuffing every 3-5 years keeps the surface performing and extends the time before a deeper regrind is required.
Q: Does the restoration price include crack repairs?
Crack and joint repairs are assessed separately on site and quoted as part of the overall job. If the floor has cracks or deteriorated control joints, these are filled and repaired before regrinding begins. The restoration rate of $60-$100 per m2 + GST covers the grinding and polishing work - crack repairs are an additional line depending on what the floor needs.
Q: Can you tell from photos whether my floor needs a rebuff or a full restoration?
Photos help but are not definitive. The most accurate assessment comes from a site visit, where we can do a test grind to see how the surface responds. If you are not sure, send through photos and we will give you an honest initial read - but a firm quote always follows an on-site assessment.
