Paint cost per square metre in Australia

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Painters quote by the metre because the work scales with area and coats

Square metre pricing is the standard way painters work out labour, because it lets them weigh up how much wall to cover, how many coats the surface needs, and how long access will take. The maths is simple. Paint covers a set area per litre, and most jobs take two coats. Dulux's own calculator uses about 16 square metres per litre for wall, trim and ceiling paint, and assumes two coats as the ideal.1DuluxView source So a fair per-metre rate should already fold in labour, materials, and a normal prep allowance.

The method works well when scope is clear. A repaint of flat, sound walls in normal rooms is easy to price by the metre. Jobs with lots of cutting in, fancy cornices, or high ceilings take more time per metre, so the rate goes up. Knowing which factor drives a quote helps you compare painters fairly.

Per-square-metre reference ranges by surface

Prep is the biggest lever on the rate, then access, coats and material

Five factors move a per-sqm rate. Knowing them helps you read a quote.

Surface condition is the largest variable. A clean, sound coat needs light sanding and two finish coats. Flaking paint, water stains, or big holes need filling, stain blocking, and extra primer. That extra time is priced per metre. The makers agree on why it matters: Dulux says prep is key to a great finish, and that a smooth finish starts with a smooth surface.2DuluxView source

Access difficulty adds cost when a painter needs scaffolding or a boom lift. High ceilings, steep roofs, and two-storey exteriors take longer per metre to cover safely.

Number of coats follows the surface. Premium finishes, and going from dark to light, often need an extra coat. A painter pricing by the metre should say how many coats are included.

Surface material matters on roofs. Tile roofs need a sealer before the topcoats. That adds a product and an extra drying pass, which metal roofs skip.

Job size sets a floor. Setup, masking, and cleanup cost about the same whatever the area. So small rooms work out dearer per metre than large open walls.

Interior rates sit higher per metre because rooms mean more cutting-in

A standard interior repaint (sound walls, normal ceiling height, no major patching) falls at the lower end of the interior range. That covers cleaning, light sanding, spot primer where needed, and two finish coats. Two coats is the basis paint coverage is worked out on.1DuluxView source

The rate rises when prep goes up. Ceilings and trims are separate items, with different rates to walls, because they need more careful cutting in. Rooms with high ceilings or split levels need access gear, which adds to setup time and the per-metre rate.

For a whole-house interior paint, most painters quote a day-rate or room-rate, not a strict per-metre figure. The per-metre view is most useful when you compare quotes on a known scope, such as the living-area walls only.

For current rates in your suburb, see the live painting cost guide.

Exterior rates run lower per metre, but prep and access can flip that

Exterior painting usually costs less per metre than interior work. Outside surfaces are larger and flatter, so a painter covers more ground per hour than cutting in around windows and trims. Standard rates apply to a well-kept single-storey exterior in fair condition.

A few things push exterior rates up. Widespread flaking paint must be stripped back before a new coat goes on, and Dulux is blunt that prep is key to a great exterior finish.3DuluxView source Two-storey homes need scaffolding or a lift, often a separate fixed item on top of the rate. Special coatings, like weatherproof or anti-mould products, add to the cost too.

Most exterior quotes include gap-filling, minor crack repair, and re-sealing around windows and doors. Check what's included before you compare rates.

Roof rates are lowest on simple metal, higher on tile and steep pitches

Roof painting comes in lower per square metre than walls on a standard job because large roof areas can be spray-applied efficiently. The rate holds on simple Colorbond or metal roofs in reasonable condition.

Tile roofs cost more. They need a penetrating sealer to prevent the tile from absorbing topcoat, which adds a product and a drying pass. Steep pitches on any roof type increase labour because positioning is slower and safety rigging takes more setup time.

Heavy restoration (significant rust, widespread flaking paint, or corroded ridgecapping) can push rates well above a standard repaint. On older roofs, getting a detailed inspection quote before comparing per-sqm figures is worth the extra step.

Per-metre vs room-based quotes: pick the one that fits your scope

Both methods are fine. A per-metre quote gives you a clear view of scope, because you can measure the room and check the maths yourself, while a room-based or day-rate quote can be simpler and may already cover the door and window cut-ins that a raw wall-area figure misses.

When scope is uncertain (you want a few rooms painted but haven't settled on which) a room-based quote is easier to adjust. When scope is fixed and you are comparing several painters, the per-metre view makes that comparison far more straightforward.

Neither method saves you from a painter who hasn't quoted the right prep. Your best defence is a written quote that spells out the surface condition it assumes, the number of coats, and exactly what prep is included. Use the estimate above to get a ballpark before you start calling painters.

For current rates in your suburb, see the live painting cost guide, or read the full guide to house painting in Australia.