I That’s a bit of a “how much is a piece of string” type question as there are so many variables. We were told by our builders that thermally broken aluminium is more expensive than timber or uPVC. Dowell do a thermally broken aluminium window that is apparently well priced (about 30% more than standard aluminium) but only available as awning windows. Our timber, double glazed, low e glass windows were about $15,000 more than if we’d gone with standard, double glazed aluminium. I think $30-35,000 all up. This included some large windows and sliding doors. They were custom made. I’ll attach our window and door schedule and you can do the maths if you want to. Personally, I’d go with either timber, uPVC or thermally broken aluminium if you are getting double glazing and can afford it. And check out the WERS website. Best of luck with the build.

We recently had some quotes for these, we have large french doors with sidelights, and were quoted around $2,500 for these. For our small toilet windows and they were $300 each. I hope this gives your some idea of price range.

Thank you for the advice everyone. As expected there seem to be quite a few variables which is probably why noone has been able to give me much of an idea on cost until now. The prices on above give me some hope that will be in our budget.

I got a quote this morning for 2 of the doors and was a bit shocked to find that is was over $15K (although that was for a 4250w x 2400h lift and slide door that I was expecting to be more expensive & a 2400w x 2400h sliding door). Given that we have 9 sliding/stacker doors & 31 windows in our build cost will be a big factor. And yes, I'm already looking into reducing the number and sizes of the windows :)

We used ecoStar and love our UPVC windows! We have two large living room windows and an even bigger one in the master. We did 3 sides of the house as we’re planning an extension out the back. We’ll use ecoStar again. They were made in England but for Australian weather conditions (much more severe UV conditions). Doors are hugely expensive so we might look at alternatives for when we update those. 1 extra large, 2 large, 3 medium, 1 small window cost us $38k but we’re paying it off interest free over 3 years. (Miserable day) We used Magic seal for the fly screens and Victory blinds. Good luck.

Ours are uPVC through Thermosmart. They are tilt and turn style which we love.

Ours come in at the same price as thermally broken aluminium but so much better than aluminium in our opinion.

All our windows are double glazed, argon filled with low e coating. They were very similar in cost to our frame but we have a lot and they’re all big!! We also have a big double door.

We’re very happy with ours.

Hi Tan Ruth,

I know that double glazing is horribly expensive and Pilkington Glass Dandenong Victoria used to make a "Comfort Plus" glass 6.38 mm laminated with very similar creds to double glazed but 1/3 the price. Made as a float not individual pieces too.

There is a company called "Stock Windows and Doors" in Cranbourne Vic who are very knowledgeable, price competitive and very friendly to work with. I would ring them, chat and take their advise.

Cheers Margot