Doors and Windows Supply Cost Guide for Australian Builders (2026)
- 15 hours ago
- 2 min read
Short answer first. For a custom residential project, imported commercial grade aluminium doors and windows, double glazed and NCC compliant, typically land at a meaningful discount to local supply once you account for the full package, not just the unit price. The saving is real. The risk is in the execution, not the product.
Why doors and windows blow the budget
Build costs are up around 47 percent over five years on contracts you largely cannot reprice. Builder margin and overhead now sits at only 20 to 25 percent of contract value. Doors and windows are one of the fastest moving cost lines, because custom sizes, double glazing and energy compliance all stack on top of the base unit. When the quote comes in over budget, this is one of the first packages builders look to claw back.
Where the price gap actually is
The same product, from the same class of audited factory that supplies five star hotels, can be procured offshore for a fraction of local cost. The gap is not lower quality. It is the local margin stack, the freight, and the coordination that most builders are not set up to carry. Capture the gap and you protect your margin on a fixed price contract. The catch is that going offshore alone introduces new risk, and that is where the saving usually leaks back out.
The four places it goes wrong, and how to close them
Wrong product on site. The container lands and the dimension, profile or finish is wrong. Resolve it at shop drawing stage, before anything is cut. Language kills the specification. Shop drawings get misread in translation. Coordinate drawings and sign off the spec in both languages before fabrication. QA that does not exist until delivery. The sample was perfect, the batch is not. Run factory QA on every order with a photo report before loading. Programme gets eaten. Late freight and damage in transit. Stage delivery to your programme and pack each unit to survive shipping. One missed item from a window schedule becomes an 8,000 dollar variation, so eliminate it upstream.
What you should be specifying
For Australian residential and boutique commercial work, the spec that holds up is commercial series aluminium, double glazed Low E insulated glass units to AS2208 and AS2047, and NCC Section J energy compliance. Get those three right and the package passes certification and performs. Get them wrong offshore and you inherit a compliance problem on site.
How to compare a local quote to an offshore one
Do not compare unit price to unit price. Compare the delivered, installed, compliant package. Put freight, duties, QA, drawing coordination and any local install on both sides of the ledger. The honest comparison is the full package, landed and accountable.
The fastest way to a number
Send your drawings and window schedule. A scope breakdown, indicative saving and a process overview comes back within five to seven business days, no obligation. That tells you whether the gap on your specific project is worth pursuing before you commit. Contact SupplyNet at info@supplynet.com.au or 0452 190 427.