Louvre Windows Cost & Sizes in Australia (2026)

A louvre window is not one product at one price. It is a frame, a gallery of blades, clips, an operating bar and a handle, and the cost moves with each. This guide covers what drives a louvre quote and the sizes.

What drives the price of a louvre window

Height comes first, because a taller louvre means more blades, more clips and a longer operating bar. A louvre is priced by how many blades it has far more than by how many square metres it encloses.

Width is the second driver, and where budgets surprise people. Breezway's Palmair documentation limits louvre blade lengths to 900 mm by building code and recommends 750 mm, with a mullion beyond it, so a wide opening becomes several bays rather than one wide sash. Capral's Urban Plus 393 louvre in 152 mm blades, priced by Sydney fabricator GEM Windows and Doors, lists one bay at 400 x 430 mm for $566.25, a two-bay frame at 400 x 1,959 mm for $1,217.08, and a four-bay frame at 400 x 3,913 mm for $2,393.38. Price roughly doubles with width.

Blade material, glazing and hardware follow. G.James publishes a wind rating table for its 050 Series in which 6 mm toughened glass blades hold the widest span at every rating from N1 to C3, while annealed glass and aluminium blades must be narrower, so a cheaper blade can mean needing a mullion. SMIRO's Urban series louvre comes in 6 mm single glazed or 5 mm plus 6Ar plus 5 mm double glazed, the double-glazed build being the largest single uplift. G.James also notes that water performance requirements may reduce gallery height and blade width, so an exposed elevation forces a taller, narrower window than a sheltered one.

Supply-only versus supplied and installed

The largest reason published louvre figures disagree is that some describe supply-only and some describe supplied and installed. The gap is labour plus freight, flashings, sealing and disposal.

Airtasker's aluminium windows cost guide, published 8 July 2026, prices a louvre window at $300 to $600 supply-only and attributes the spread to window size and blade count. DABSCO's Darwin window replacement guide for 2026 prices a louvre at $600 to $1,100 per window supplied and installed. Treat the second as directional rather than national, but the installed price starts roughly where the supply-only range finishes.

Airtasker records professional installation at around $40 to $50 per hour, and the same DABSCO table puts the louvre line about $100 above the sliding window line once both are installed. Online Windows in Queensland lists a 1194 x 450 mm louvre at $481.30 and a 2454 x 2916 mm one at $2,808.44.

Common louvre window sizes and heights by blade count

Louvre heights are not arbitrary. CRL Laurence gives the formula for its Toren range: for 152 mm blades, height equals the number of blades multiplied by 139.7 mm, plus 25.4 mm; for 102 mm blades, height equals the number of blades multiplied by 88.9 mm, plus 25.4 mm. The 25.4 mm is the frame allowance and each pitch is the blade width plus its overlap, so the two commonly specified families are 102 mm and 152 mm. A 152 mm blade opens more area per blade; a 102 mm blade adjusts more finely.

In the 152 mm family CRL gives 305 mm at two blades, 864 mm at six and 1,702 mm at twelve, reaching 2,959 mm at twenty-one. Doric's Ventus range runs 320 mm at two blades to 2,420 mm at seventeen, and G.James lists 460 mm at three blades and 1,160 mm at eight.

Frame depth then adds height on top of the gallery. G.James publishes each blade count three ways, gallery only, on a 48 mm frame and on a 101 mm frame, and at three blades that is 310 mm, 336 mm and 361 mm. Doric adds that where an opening is smaller than a standard gallery, the next size up is trimmed and its top blade fixed in place, which is cheaper than a bespoke height.

SMIRO's Urban series louvre comes in two series, named 100 and 150, which correspond to blade families of that order, and the configuration sheets give the sizes within each. There is no single SMIRO size table to quote, because the height follows from the blade count.

Frequently asked questions

Are louvre windows cheaper than other windows?

Generally no. Published figures place a louvre in the same band as, or above, a standard sliding or awning window of similar size, and the extra mechanism and blade count are the reason. DABSCO's Darwin table for 2026 puts the louvre range of $600 to $1,100 about $100 above the sliding range of $500 to $900, both supplied and installed.

How much do louvre windows cost per square metre?

No primary Australian source found for this article publishes a clean per-square-metre rate for louvre windows, because a louvre's cost tracks blade count and height far more than area. Aurae's 2025 louvre cost guide prices architectural louvre screens at $400 to $850 plus GST per square metre, but those are sun-shading screens, not glass-bladed windows.

Why is my louvre quote higher than the online price?

Almost always because the online price was supply-only and the quote is supplied and installed, and sometimes because the two are different sizes. One page listing $481.30 for a 1194 x 450 mm louvre and $2,808.44 for a 2454 x 2916 mm one shows how little a price means without its dimensions.

What to have ready for a quote

A louvre quote is only as good as the information given. Start with the opening: width and height in millimetres, and the basis you measured on, whether inside the reveal or across the stud opening. This matters, because the Queensland price lists above state their sizes are stud opening sizes for reveal windows only.

Then the specification: whether a standard gallery height suits the opening, whether a 102 mm or 152 mm blade is wanted, single or double glazing, whether toughened glass is needed for the span and wind rating, and how many bays the opening takes.

Then the finish and the transaction: frame colour, handle type, a keyed lock or restrictor where required, and whether the quote covers supply only or supply and installation with screens, reveals and disposal included. The fall-prevention rule for upper-storey bedroom windows makes a restrictor a requirement, not an option.

The honest answer on louvre window cost

No published range is a substitute for a project quote, because the inputs to a louvre window vary more widely than any range of outputs can capture. It is priced by blade count and width, then by how many bays the opening needs, then by blade material, glazing, finish and hardware, and finally by who installs it.

The published figures are good for checking that a quote is in the right order of magnitude. The size system is good for making sure the quote describes the window that was asked for. Bring the opening, the blade preference, the glazing and the wind rating to a supplier, and the quote you receive will be a real number rather than a range.