The cheapest sensible way to re-window a Berwick house, and when cheap costs twice.
A 10 to 12 opening Casey house in 2026: about $12,000 to $16,000 done the cheap-but-sound way in standard-size single-glazed aluminium, $22,000 to $32,000 double glazed, and $40,000 to $60,000 for thermally broken glass and a stacker. Below that bottom figure you are not buying a cheaper job, you are buying an unfinished one.
What each budget actually buys on a typical Casey house.
Prices are 2026 supply-and-install totals for a single-storey house with 10 to 12 window openings and one sliding door, same opening sizes, one mobilisation, in Berwick, Narre Warren, Cranbourne, Hampton Park or Endeavour Hills. Per-opening rates sit on the pricing page.
| Tier | Real 2026 price | What you get | What you give up | Who should pick it |
|---|---|---|---|---|
| Budget | $12,000 - $16,000 | Branded residential aluminium, AS 2047 labelled, single glazed, standard manufacturer sizes, standard powder coat colour, removal and disposal included, flyscreens on openers | Winter comfort and condensation control, colour choice, custom sizes, reveal and architrave make-good (you paint), acoustic performance | Landlords, a house you will sell within 3 years, or a genuinely fixed budget where the alternative is doing nothing |
| Mid | $22,000 - $32,000 | Same frames double glazed with a Low-E coated unit, choice of powder coat colour, reveal make-good included, better hardware and rollers, 10 to 20 year glass seal warranty | Thermal break, acoustic laminated glass, stacker or bifold upgrade, any change to opening sizes | Most owner-occupiers staying 5 years or more. The one we recommend. |
| Premium | $40,000 - $60,000 | Thermally broken frames on west and north, acoustic laminated glass to the road side, a wider stacker to the alfresco, full make-good and repaint, upgraded locks and restrictors | Roughly $20,000 more than the mid tier, and 8 to 12 weeks of lead time instead of 4 to 6 | Long-term homes on a west-facing block, or a house on a busy road where noise is the actual complaint |
Two-storey work adds scaffolding at roughly $900 to $2,400 a week. Changing an opening size adds lintel and brickwork at $900 to $2,500 per opening. Both sit outside every tier above.
Where you can take money out without paying for it later.
Order standard sizes. Every manufacturer runs standard height and width increments, and staying on them is free money. A custom width, an arched head or a raked top costs 20 to 40 per cent more for the same glass, and on a 12 opening house that is $3,000 to $6,000 for a difference nobody notices from the street.
Do not move the openings. Keeping the existing structural opening means no lintel, no brick cutting, no re-render and no engineering. Widening one opening for a stacker is a legitimate spend if the room needs it, which we work through on the stacker door page, but doing it in three rooms because it looks better in a brochure is how a $24,000 job becomes $32,000.
Do the prep yourself. Take down curtains, blinds and tracks, pull off the internal security screens, clear two metres in front of every opening, cut back the shrubs and move the pots outside. That is a Saturday of your time and it takes real hours off the install. Repainting the reveals and architraves yourself after we have made good saves another $120 to $250 per opening.
One mobilisation, not three. Setting up a crew, protection, tools and a skip costs roughly $800 to $1,500 each time, whether it is for two windows or twelve. If you genuinely have to stage the job, stage it by elevation and do the west side first, because that is the one costing you money every summer afternoon.
Book in the quiet months. Factory lead times in Victoria stretch from about September through to Christmas as everyone tries to finish before the break. June to August is the quiet run: shorter lead times, more flexible install dates and more negotiating room. Working in the cold is not fun but each opening is only out for one to three hours. There is more on sequencing on the best time to replace windows page.
Re-mesh instead of replacing flyscreens. If the screen frames are straight, a re-mesh is $45 to $85 against $120 to $220 for new. On twelve openings that is a few hundred dollars for the same result.
Want the three tiers priced on your actual house?
Free on-site measure across Berwick and the City of Casey. We quote the budget and the mid tier side by side so the gap is a number, not an opinion.
The four savings that get paid for twice.
1. Single glazing now, double glazing later. The glass premium today is about $300 to $500 per window. Doing it later means buying the whole window again at $1,600 to $2,400 fitted, because the frame for a single-glazed unit will not take a thicker insulated unit. On a 12 opening house that is a $5,000 decision now against a $24,000 decision in eight years. If the budget only reaches the bottom tier, double glaze the living areas and the west-facing bedrooms and single glaze the rest, rather than single glazing the whole house.
2. Leaving out the reveal and architrave make-good. Taking a frame out of a brick veneer wall damages the plaster return and usually the architrave. If the installer does not make that good, you are hiring a carpenter and a painter afterwards at $180 to $480 per opening for work that takes twenty minutes while the wall is already open. It is the single most common surprise cost we see on other people's quotes.
3. Hiring on price with no registration or insurance check. Domestic building work in Victoria sits under the Domestic Building Contracts Act and the Building Act, and above a set contract value the builder must be registered and must hold domestic building insurance. That threshold has sat at the same figure for many years, but check the current amount with Consumer Affairs Victoria or the Victorian Managed Insurance Authority rather than taking anyone's word for it. If your installer is not registered and disappears, there is nothing behind the warranty. Our warranty page sets out exactly what to ask for and keep.
4. Skipping the flashing and the sealant detail. This is the invisible one. A window fitted without head flashing and without backing rod behind the perimeter bead will look identical for two winters and then leak at the head in a driving westerly. Casey clay moves the house seasonally and a bead with no backing rod tears. Rectifying a leak means removing architraves, drying out and repainting, and it costs several times what doing it right cost.
What the $4,000-cheaper quote is usually leaving out.
When a quote lands well under everyone else, it is almost never because the operator found cheaper aluminium. Work down this list and ask for each item to be marked included or excluded in writing: removal and disposal of the old frames and glass, which is $40 to $120 per opening in skip and tip charges; the reveal and architrave make-good; flyscreens on every opener; safety glass where AS 1288 requires it in doors, side panels, bathrooms and low glazing; opening restrictors or screens where a bedroom window sits well above the ground outside, which the National Construction Code requires for upper-level openings; scaffolding on anything two-storey; and GST. Add those back and the gap between quotes usually collapses to a few hundred dollars.
Two more worth asking about. Is the price fixed after the check measure, or is it an estimate that moves once the frames come out. And who carries the risk if an opening turns out to have no lintel or rotted framing behind the render, which happens often enough on the older Berwick and Doveton housing stock to be worth a sentence in the contract.
What Victorian programs actually change the maths.
There is no Victorian rebate for replacing windows. The Victorian Energy Upgrades program discounts a published list of specific activities, and draught sealing around existing doors and windows in an existing home has been on that list, which is worth checking because sealing is cheap and effective. Full window replacement is not a listed activity. Solar Victoria rebates target heating and cooling, hot water and solar rather than glazing. The activity list changes, so check the current one before assuming either way.
What does change the maths is what you are not required to do. Replacing windows like for like in the same openings of an existing house generally does not trigger the 7 star energy rating that applies to new homes, so there is usually no NatHERS assessment fee of $280 to $580 to pay. It also generally does not need a building permit, unless the property carries a heritage overlay, you are in a designated bushfire-prone area, or you change the size of a structural opening. Our City of Casey permits page walks through how to check your title, and the City of Casey page covers the suburbs where overlays are common.
The honest constraint. If you are selling inside twelve months, do not do this. A $22,000 to $32,000 re-window will not come back at auction in Casey. Spend $2,500 to $4,000 on the two or three worst openings at the front of the house, re-mesh the flyscreens, service the sliding doors so they run, and put the rest in the campaign. If the windows are only tired rather than failing, the maintenance page will get you further than a chequebook. And if the frames are sound and only the glass has failed, retrofitting new units into the existing frames at $450 to $950 a sash beats replacement outright, which we compare on the retrofit versus replacement page.
Get your budget tier priced in writing.
Tell us your ceiling and we will tell you honestly what it reaches. Free on-site measure, fixed written quote within 7 days, no obligation.
What Berwick homeowners ask about doing it cheaply.
What is the cheapest way to replace windows in a Berwick house?
Is it cheaper to replace windows a few at a time?
Where is saving money a false economy on window replacement?
What does a suspiciously cheap window quote usually leave out?
Is there a Victorian rebate for replacing windows?
Should I replace windows before selling a house in Berwick?
Tell us the budget. We will tell you what it reaches.
Free measure in Berwick, Cranbourne, Narre Warren, Hampton Park and Endeavour Hills. Itemised quote so you can see every line you could cut.