Subfloor preparation
The least visible part of the job and the part that decides whether the floor above it lasts. Always assessed on site, always quoted separately.
Read moreGuide
Flooring quotes vary because eight things vary: total area, the product tier, the format, the condition of the subfloor, what has to be removed first, stairs and skirting, site access, and strata requirements. Subfloor preparation is the one that moves a quote most and the one nobody can price from a photo — which is why it should always be a separate line.
A per-square-metre rate on a website is either so heavily hedged it tells you nothing, or it is a number that only holds for one specific set of conditions and quietly grows once someone sees the job. Neither helps you compare quotes.
What does help is understanding what a quote is actually made of, so that when you receive two of them you can see why they differ. That is what this page is for.
In roughly the order of how much they move the number.
For a refinishing job rather than a new floor, the drivers change: how many coats of old finish have to come off, how cupped or uneven the boards are, whether gap filling is wanted, how many boards need replacing, and whether the floor is a species that sands easily. Pine and hardwood behave very differently under a machine.
The number of coats matters too — one sealer plus two finish coats is standard, three finish coats for heavy traffic — as does the coating system chosen.
If you are comparing quotes, these are the things that make them comparable.
The cheapest quote in a set of three is usually cheap for a reason that is visible if you look: a thinner wear layer, no allowance for subfloor preparation, scotia instead of refitted skirting, or removal excluded. That is not necessarily wrong — if your subfloor genuinely is flat and dry, a lower price for the same work is just a better price.
The point is to be comparing the same job. Most of the time, two very different numbers are describing two different scopes.
Last reviewed 2026-09. General information only, not legal advice — check your own by-laws and the current legislation before acting.
Questions
Because the largest variable — the condition of the subfloor — cannot be seen until the existing covering is up, and the second largest, the product tier, has not been chosen yet. A phone figure is either padded to cover the worst case or it becomes a variation later. A free on-site measure takes half an hour and produces a number that holds.
Sanding and polishing an existing timber floor is almost always considerably cheaper than laying a new one, because there is no product cost, no removal and no disposal. The exception is a floor that has already been sanded to its limit, has widespread damage, or where floor levels need to change. We measure the remaining wear layer before advising.
Usually, yes. Set-up, delivery, mobilisation and site protection are largely fixed costs, so spreading them over a larger area reduces the effective rate. Most installers price a whole-house job more keenly per metre than a single room. A very small single-room job is disproportionately expensive per square metre for exactly this reason.
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The least visible part of the job and the part that decides whether the floor above it lasts. Always assessed on site, always quoted separately.
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A free on-site measure and an itemised written quote.