Why prep is the real product, how painting quotes differ, and the questions that reveal whether a painter's work will still look good in five years.

Painting looks like the most DIY-able trade there is, and for one feature wall it might be. But a full room or a whole house painted properly is a different discipline — and the difference between a professional finish and a quick coat isn't the paint, it's everything that happens before the paint.
Here's what you're actually paying a painter for, and how to tell the ones worth paying.
The visible part — cutting in and rolling — is maybe half the job. The rest is preparation: filling cracks and holes, sanding, spot-priming stains, caulking gaps along trims, and protecting everything that isn't being painted. On older walls, prep can take longer than painting. That's normal, and it's precisely the work you can't see in finished photos but will see in raking afternoon light for years if it's skipped.
Painters handle walls, ceilings, doors, trims and sometimes exteriors. Where they hand over: significant plaster damage is a plasterer's job first, and wallpaper stripping or hanging is its own specialty that some painters do and some don't. If your walls need real repair, get that scoped explicitly rather than assuming the painter will absorb it.
Interior painting is typically priced per square metre of wall or per room. A single bedroom sits in the hundreds; repainting the walls of a whole three-bedroom home runs into the middle thousands; adding ceilings, doors and trims throughout pushes toward five figures. Treat these as indicative bands — the calculator on this page gives a closer read for your own areas.
When quotes for the same rooms differ widely, the gap is nearly always in prep and coats. One painter has priced two careful coats over properly prepared walls; another has priced one-and-a-touch-up over a quick sand. Ask every quoter to state the number of coats and describe the prep — that single question makes quotes comparable.
Painting is unlicensed in most of Australia (Queensland licenses it above certain job values), so the registers won't help you much here. Your protection is evidence: recent local jobs you can see or at least see photos of, reviews that mention tidiness and schedule, and a written quote that specifies surfaces, prep, coats and the actual paint product line.
Good painters are fussy people. They'll talk about sheen levels for different rooms unprompted, recommend mould-resistant paint for wet areas, and flag dark-to-light colour changes as needing an extra coat. Vague enthusiasm plus a low number is the combination to be wary of.
Painting disputes are rarely about colour. They're about scope assumptions that were never written down.
Indicative range only, not a quote — see the full guide for worked scenarios and what moves the price.
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