Question 1

How much does it cost to replace windows in Australia?

Accepted Answer

Trade Heroes' 2025/2026 guide puts double-glazed replacements at roughly $500 to over $1,500 per window, with a mid-grade composite or low-E unit near $900/window GST inclusive, so a typical 10-window job lands around $9,000 — single-pane and budget aluminium fall lower, while bay, bow, and large architectural windows, premium uPVC, and triple glazing run well above. Use the calculator above for a range matched to your window count, size, and material.

Question 2

What's the difference between insert and full-frame replacement?

Accepted Answer

An insert (retrofit) window fits inside the existing frame and is faster and cheaper. Full-frame replacement strips the old frame back to the opening, adding removal and trim labour, and is the right choice when the existing frame is rotten or you're changing the window size. Toggle 'Full-frame replacement' to include that extra labour.

Question 3

Which frame and glazing should I choose?

Accepted Answer

Aluminium with single glazing is the budget standard; uPVC and composite frames with double-glazed low-E units are the durable mid-grade; timber and thermally-broken frames with triple glazing sit at the top for cold-climate and acoustic performance. Prices shown are GST inclusive — pick the option that matches your exposure and budget and the calculator scales the estimate accordingly.

Item	Estimate
Old window removal	$900
Window unit	$4,300
Installation labor	$2,100
Trim, flashing & finish	$700
Disposal	$180
Subtotal	$8,180
VAT (10%)	$818
Total inc. VAT	$8,998

Window Replacement Cost Calculator

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