There is no single price for restoring a sash window in Melbourne, because the cost depends on what is wrong with the window. A sash that only needs new cords and a free-running action sits at one end of the scale. A window with a rotted sill, failed joinery and a missing section of heritage moulding sits at the other. This guide explains what moves the figure, what published ranges exist, and how to read a quote so you can compare like with like.
We are a Melbourne painting and heritage restoration business, and we do not publish fixed window prices. Every Victorian and Edwardian window we assess is different, so we quote after inspecting the timber. What we can do is show you how the cost is built.
TL;DR
- Sash window restoration is priced per window and varies widely, from a few hundred dollars for cord work to several thousand for rot repair, joinery and glazing.
- One published Australian range runs from $180 to $12,000 or more per window, depending on the repair type, glass, timber condition and heritage scope. It is a South Australian guide, so treat it as indicative only.
- Timber condition is the biggest swing factor. Rot found after the paint is stripped changes the scope.
- Victorian Energy Upgrades discounts may apply if you add double glazing, but only through an accredited provider.
- Compare quotes on scope, not on the bottom line.
Table of Contents
- What a sash window restoration actually involves
- What published ranges tell you
- The factors that move the price
- Repair, restore or replace?
- Adding double glazing: costs and rebates
- How to compare sash window quotes
- Perspective: why we price after inspection
- When it makes sense to bundle windows with a bigger project
- Talk to us about your windows
- FAQ
- Sources
What a sash window restoration actually involves
A full restoration is more than a repaint. The work usually follows a sequence, and each step carries a cost:
- Assessment. The sashes, frame, sill, horns and pulleys are checked for rot, movement, failed putty and old paint build-up.
- Removal and access. The sashes are taken out of the frame. On upper storeys, scaffolding or access equipment may be needed.
- Timber repair. Soft or rotted sections are cut out and replaced with matching timber, or consolidated where the timber is sound enough to keep.
- Glazing. Cracked panes are replaced and putty is renewed.
- Mechanical work. New sash cords or chains, rebalanced weights and cleaned pulleys let the window move as it should.
- Preparation and painting. Old coatings are stripped or sanded back, primed and finished so the repair lasts.
Because step 6 is part of the job, a painter who also handles carpentry has an advantage. Nothing is repaired and then left for another trade to coat months later. We cover this in our heritage painting services.
What published ranges tell you
Melbourne window specialists rarely publish fixed prices, and the ranges you find online mix very different jobs. One useful example is a guide to heritage sash and frame repair that lists single sash cord replacement at $180 to $450 per window and an overall spread of $180 to $12,000 or more per window. That guide covers South Australia, so Melbourne figures will differ, but the shape of the spread is the same everywhere.
The table below shows how scope tends to relate to cost. It describes the relative level of work, not a quote.
| Scope of work | What it covers | Relative cost |
|---|---|---|
| Free-up and cords | Releasing painted-shut sashes, new cords, minor adjustment | Lowest |
| Overhaul | Cords, new putty, minor timber repair, draught sealing, repaint | Moderate |
| Full restoration | Rot repair, joinery, reglazing, mechanical rebuild, full paint system | High |
| Reconstruction | New sashes or frame sections made to match the original profile | Highest |
If you see a single figure quoted for “a sash window” with no description of scope, ask which row of this table it belongs to.
The factors that move the price
Condition of the timber
This is the largest variable. Surface paint failure is cheap to fix. Rot in the sill, the bottom rail of the lower sash or the frame joints is not. Rot often hides behind sound-looking paint, which is why a firm quote is only possible after inspection. Our rotted frame repair checklist shows what we look for, and signs of window rot helps you spot trouble early.
Window size, number and height
A large bay window with three or four sashes costs more than a single bedroom window. Height matters too. Windows on a second storey need access equipment, and we handle multi-storey properties as part of our standard heritage work.
Glass and glazing
Original glass has character that many owners want to keep. Replacing a cracked pane is simple. Matching old cylinder glass or reglazing leadlight sections costs more.
Hardware and mechanics
Broken pulleys, missing weights or sash cords that have snapped inside the box all add time. Taking the box apart without damaging the lining requires care.
Detail and mouldings
Architraves, sill noses and decorative trims around the window are part of the visual result. If they are damaged, matching profiles means custom milling or joinery. See our guide to architrave repair in Melbourne for how that is quoted.
Heritage controls
If your home is under a heritage overlay, the scope of permitted change can shape the work. Repairing like for like is generally simpler than altering the window. We outline the process in our guide to heritage window costs, permits and quotes. Check with your local council about your own property.
Repair, restore or replace?
Owners often assume replacement is the cheaper route. On an old timber sash it rarely is, once you count the loss of original fabric and the matching work needed to fit a new unit into a heritage façade. Old-growth timber in an original sash is frequently denser and more durable than much of what is available new, so repair is often the sound choice where the frame is structurally intact.
Replacement makes sense when the frame has failed throughout or when an earlier owner has already swapped in unsuitable units. Even then, a replica made to the original profile is a different job from an off-the-shelf window.
Our Victorian window repair guide and heritage window repair guide walk through this decision in more detail.
Adding double glazing: costs and rebates
Double glazing is the most common add-on question we hear, and it is also the one that most inflates a budget. Two points are worth knowing before you ask for it.
First, a sash must have enough depth in its rebate to hold a thicker sealed unit, and the added glass weight changes the balance of the window. That is a design question for the restorer, not a box to tick.
Second, much of the comfort gain in an old sash window comes from sealing it properly. Draught-proofing a window that rattles in its frame often delivers a noticeable improvement before any new glass is considered. The benefits of energy-efficient windows are real, but they depend on the frame being sound and sealed first.
If you do add glazing, the Victorian Government’s program may help. Under Victorian Energy Upgrades, discounts of up to $210 per 10 m² apply to double glazing, with a lower figure for thermally efficient glazing products. To receive a discount you must work with an accredited provider, and the provider must be accredited for the specific window activity. The rebate is only one part of the total price, so get quotes from several providers. Double glazing is not available through the program for new builds, but it can apply to existing single-glazed windows.
At that discount level, a typical bedroom sash will see a modest reduction in the overall bill. Treat the rebate as a helpful offset, not the deciding factor.
How to compare sash window quotes
Two quotes for the same house can differ by thousands without either being wrong, because they describe different work. Check these points on each:
- Itemised scope per window. Does it say what is repaired, what is replaced and what is only painted?
- Timber repair method. Is rotted timber cut out and replaced, or filled over?
- Allowance for hidden rot. How will extra timber repair be priced if found once the sash is out?
- Paint system. Which primer and topcoat, and how many coats?
- Access. Is scaffolding or lift access included or extra?
- Who does each trade. Is the carpentry in-house, or subcontracted?
- Making good. Are plaster, architraves and surrounding trims covered?
Our 10 point quote checklist for timber window restoration goes through these in full. Our broader timber restoration cost guide for Melbourne puts windows in the context of the whole house.
Perspective: why we price after inspection
We are painters first, and that shapes how we see windows. A failing window is usually a coating problem that has been left long enough to become a carpentry problem. If water gets behind flaking paint at the sill, the timber softens, and a repaint becomes a repair. This is why we resist quoting a window from a photo.
We also see the cost of splitting the work. When a carpenter repairs a sash, a glazier replaces a pane and a painter coats the result on separate visits, each trade relies on the last one having done their part well. Gaps open up between them, and that is where leaks return. We manage the carpentry, restoration and painting in-house under a single project lead, so the person who finds the rot is accountable for the finish. Our guide on stopping heritage window leaks returning explains the pattern.
Our advice to owners is simple. Repair what is sound, replace only what has failed, seal the window properly, and paint it with a system suited to Melbourne’s weather. Treat a very low quote with caution if it does not describe the timber work.
— Jarrad
When it makes sense to bundle windows with a bigger project
Windows are rarely worth restoring in isolation if the rest of the exterior is also due for work. Scaffolding, preparation and coating systems are shared across the façade, so combining jobs usually avoids paying for access twice. Many of our clients bring windows, weatherboards, trims and a full exterior repaint together. Our work focuses on larger heritage and painting projects, typically $20,000 and above, handled as one coordinated scope.
If your weatherboards are also showing wear, read our heritage weatherboard replacement guide. To see how a whole-exterior project looks, view our Deepdene project.
Talk to us about your windows
If you own a Victorian or Edwardian home in the inner east, bayside or inner north and want your sash windows assessed as part of a wider restoration and repaint, we would be glad to inspect them. We repair timber window frames, restore trims and heritage details, and complete the finish under one project lead. Start with our heritage painting services, or contact us through solshine.com.au to arrange an inspection.
FAQ
How much does it cost to restore a sash window in Melbourne?
It depends on the scope. Simple cord replacement sits at the low end, while rot repair, reglazing and repainting push the figure much higher. One Australian guide lists $180 to $12,000 or more per window across all repair types. A reliable Melbourne figure needs an on-site inspection.
Is it cheaper to repair or replace a sash window?
Repair is usually the better value where the frame is structurally sound, because you keep the original timber and profile. Replacement is justified when the frame has failed throughout. A replica made to match a heritage profile is a custom job, not a low-cost option.
Can you double glaze sash windows?
Sometimes. The sash needs enough rebate depth for a thicker sealed unit, and the extra weight affects the balance system. Sealing and draught-proofing the existing window is a sensible first step and may deliver most of the comfort gain.
Are there Victorian rebates for double glazing?
Yes, through Victorian Energy Upgrades, which offers indicative discounts of up to $210 per 10 m² for double glazing. You must use an accredited provider, and final costs vary by provider and product.
Sources
- Window glazing discounts, Victorian Energy Upgrades
- Window glazing for households, Victorian Energy Upgrades
- Heritage window sash and frame repair costs, The Quote Yard
