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Velux window replacement cost in Ireland usually lands between €800 and €2,500 per window fitted, including the new unit, flashing kit and labour. A straight like-for-like swap on an easy-access roof sits at the lower end. A larger unit, a difficult pitch or extra plastering and finishing pushes it up.
That range covers the window, the flashing, any new timber battens and the fitting itself. It does not include scaffolding, internal decorating or electrical work for powered blinds, which can add a few hundred euro depending on the job.
Below we break down what moves the price, when a repair makes more sense than a replacement, and how to avoid paying twice for the same job.
How Much Does Velux Window Replacement Cost in Ireland?
Most Velux replacements in Ireland cost €800 to €2,500 per window supplied and fitted. The window itself is usually €300 to €900 depending on size and glazing. Labour, flashing and finishing make up the rest. Price climbs with roof access difficulty, unit size and whether the opening needs reframing.
Here is a rough guide to what different jobs tend to cost once fitted.
| Job Type | Typical Fitted Cost |
|---|---|
| Like-for-like swap, standard size | €800 to €1,300 |
| Larger or upgraded unit | €1,300 to €1,900 |
| New opening or awkward access | €1,800 to €2,500 |
| Electric or solar-powered unit | €2,000 to €2,800 |
These figures are estimates and move with your roof and the glazing you choose. For a price based on your actual roof, a free expert inspection gives you a firm written number rather than a guess.
What Affects Velux Window Replacement Prices?
Four things move the price most: the size and type of unit, roof access, the flashing kit needed, and any extra finishing work inside. A simple swap of an old unit for a matching new one is the cheapest route. Anything that changes the opening or needs scaffolding costs more.
The main cost drivers to watch for are below.
- Window size and glazing. Bigger panes and triple glazing cost more than a standard double-glazed unit.
- Roof access. A steep pitch or a high two-storey roof may need scaffolding, adding €300 to €600.
- Flashing type. Slate and profiled tile roofs need different flashing kits, and the right one matters for a watertight seal.
- Opening changes. Fitting a larger unit than the old one means cutting and reframing the roof structure.
- Internal finishing. New plasterboard, plastering and painting around the reveal adds labour.
Powered and remote-controlled units cost more upfront but save you climbing to open a high window. If you already have the wiring in place, the jump is smaller.
When Should You Replace Rather Than Repair a Velux Window?
Replace a Velux window when the frame is rotten, the seals have failed and misted up permanently, or the unit is more than 20 years old and parts are hard to source. A cracked pane, worn gasket or faulty handle can often be repaired for far less, so it pays to get an honest look first.
These signs usually point to replacement rather than repair.
- Persistent condensation between the panes, not just on the surface.
- Water staining on the ceiling or reveal around the window.
- Draughts you can feel even when the window is shut tight.
- Timber frame soft or spongy to the touch.
- Flashing lifting or corroded where the window meets the roof.
A leak around a roof window is not always the window’s fault. Failed flashing or a slipped slate nearby can let water in. That is why a roof repair inspection is worth doing before you commit to a full replacement, since the fix may be cheaper than you think.
What Is Included in a Velux Replacement Quote?
A proper Velux replacement quote covers the window, the correct flashing kit, labour, removal of the old unit and making the roof watertight. A good quote is itemised so you can see exactly what you are paying for. Anything vague or lumped into one figure is worth questioning before you sign.
Check your written quote lists the following.
- The exact unit size and model so you are comparing like with like.
- The flashing kit matched to your roof covering, whether slate or tile.
- Removal and safe disposal of the old window.
- Any scaffolding or access equipment needed.
- Internal finishing, if plastering and painting are part of the job.
Membership of the Guild of Master Craftsmen and full insurance are fair things to ask about too. Working at height on a roof carries real risk, and a crew with a safety officer and proper cover protects you if something goes wrong.
How Can You Keep Velux Replacement Costs Down?
Keep costs down by replacing like-for-like, grouping multiple windows into one visit, and sorting access efficiently. Fitting the same size unit avoids reframing the opening, which is where a straightforward job turns into an expensive one. Doing two or three windows together spreads the scaffolding and call-out cost.
Practical ways to trim the bill without cutting corners:
- Stick to the same opening size unless you genuinely need more light.
- Replace several ageing units in one go while the access is set up.
- Choose manual over electric if the window is easy to reach.
- Keep the existing internal finish where it is sound to save on plastering.
If you want a quick figure before you book anyone in, you can run your own numbers with our roof cost calculator and get a ballpark in about a minute.
For anything involving the wider roof, checking general planning permission rules for home alterations is worth a look, though a like-for-like roof window rarely needs it.
How Long Does a Velux Window Replacement Take?
A single like-for-like Velux replacement usually takes half a day to a full day once the crew is on site. A larger unit, a new opening or several windows together will run longer. Weather plays a part too, since the roof is open while the old unit comes out and the new one goes in.
Rough timings by job type:
- Standard swap. Three to five hours for one window.
- Larger unit with reframing. A full day, sometimes more.
- Multiple windows. One to two days depending on access.
A tidy crew makes the opening watertight before they leave, so you are never left with an exposed roof overnight. That reliability is part of why so much of our work since 1969 has come back through referrals.
Getting a roof window sorted is rarely as pricey as people fear, and the right advice up front saves you paying twice. The honest answer on whether yours needs a full replacement or just a repair only comes from someone looking at it properly.
Get it touch with our team and book a free, no-obligation roof inspection and get a clear written price for your roof window.
