Attic Window Installation: Velux Roof Window Costs 2026
Attic window installation in Ireland costs about €1,400 to €2,200 for a standard Velux in 2026. Here are the prices by window type and city, how a fit works and what the rules are.
Attic window installation in Ireland costs about €1,400 to €2,200 for a standard Velux in 2026. Here are the prices by window type and city, how a fit works and what the rules are.
Related: Attic window installation service · Attic window installation in Galway
For the service itself, see our attic window installation page. This guide is for homeowners who want to add a Velux or other roof window to an attic, replace an old leaking one, or turn an attic into a bedroom or office. We fit them in Galway, Cork, Limerick and Dublin, and the prices below cover all four.
An attic window is a window set into the slope of the roof so that daylight and fresh air reach a room in the attic. People also call it a roof window, a skylight or simply "a Velux". Velux is the best-known make in Ireland, which is why most people use the name for all of them, but other makers such as Fakro and Roto fit in the same way. We fit Velux as standard and will quote another make on request.
A roof window is not the same as a skylight on a flat roof, which is a domed or flat glass unit fixed on a kerb. It is also not a dormer, which is a small extension that sticks out of the roof with a vertical window in its face. A roof window sits flush with the roof slope, is cheaper than a dormer and does not usually need planning permission. If you are weighing it up against a dormer, see our roof installation service and roof renovation service.
These are indicative Irish-market prices for one window supplied and fitted into an existing slate or tile roof. Every price includes the window, the correct flashing kit, fitting, an insulation collar and underlay seal, and making good the roof around it. Internal finishing is listed separately because it depends on your attic.
Indicative 2026 price range for one window into an existing slate or tile roof, in euro
If we find rotten timber or a damaged rafter when the opening is made, you are told before we do the extra work.
The window and the flashing kit cost the same wherever we fit them. What moves between cities is access, parking, scaffold and how steep and exposed the roof is. Here is the standard manual window in each city.
Indicative 2026 price range for one manual centre-pivot window, in euro
| City | Standard manual Velux, fitted | Replace an old window | Electric or solar Velux |
|---|---|---|---|
| Galway | €1,400 to €2,200 | €1,100 to €1,800 | €2,400 to €3,600 |
| Cork | €1,400 to €2,200 | €1,100 to €1,800 | €2,400 to €3,600 |
| Limerick | €1,350 to €2,100 | €1,050 to €1,700 | €2,300 to €3,500 |
| Dublin | €1,600 to €2,500 | €1,250 to €2,000 | €2,700 to €4,000 |
Galway roofs take hard weather. Wind and driving rain off the Atlantic reach Salthill, Knocknacarra, Barna and Oranmore with little shelter, so the flashing and the seal around the window matter more than the window itself. We use the full manufacturer kit, never a part kit, and we fix the flashing for exposed sites. Many Galway homes have natural slate or older concrete tile, and we match the right kit to each. Read our full attic window installation in Galway guide, see our Galway roofers and roof repairs in Galway, and our slate versus concrete tile guide for what your roof is made of.
Cork has some of the wettest weather in the country and a lot of attics worth converting, from 1930s city houses to 1970s and 1990s estates in Ballincollig, Douglas and Carrigaline. Cork prices match Galway. Steep streets and tight access sometimes mean an access tower, which we price before we start. Read about attic insulation and ventilation in Cork before you convert, and see our Cork roofers.
In Limerick the work is mostly on estate semis in Castletroy, Raheen, Dooradoyle and Corbally, where access is usually easy and prices sit a little lower. Our Limerick crew also deals with Georgian and older city properties. See our Limerick roofers and roof replacement in Limerick.
Dublin attics are often a conversion into a bedroom or office, and the Victorian and Edwardian houses in Rathmines, Rathgar, Dundrum and Blackrock suit roof windows well. Dublin prices run higher because of access, parking and scaffold. Check any older house against its conservation status first. See our Dublin roofers and roof repairs in Dublin.
Most of the price difference comes from the type you choose. Here is how the main ones compare.
| Type | How it opens | Best suited to | Indicative fitted price |
|---|---|---|---|
| Fixed | Does not open | Stairwells, landings, anywhere you only want light | €900 to €1,500 |
| Centre-pivot | Rotates around the middle | Most attic bedrooms and offices | €1,400 to €2,200 |
| Top-hung | Hinged at the top, opens outwards | Low sills and a clear view out | €1,700 to €2,600 |
| Electric or solar | Opens by switch, remote or sensor | High ceilings, hard-to-reach windows | €2,400 to €3,600 |
The centre-pivot is the standard choice and the one we fit most. The sash rotates around a pivot at the middle, so you can open it to ventilate, rotate it fully to clean the outside pane from indoors, and still stand clear of it. It suits most attic rooms where the sill sits at about waist height.
A top-hung window is hinged at the top, opens outwards and gives a clearer view. It is the better pick where the sill is low and you want to look out while standing, such as a landing or a bedroom with a low eaves line.
Electric Integra models open and close from a wall switch or remote. Solar models do the same with a built-in panel, so there is no electrician and no cable chased through the plaster. Both are worth paying for where the window is above reach, and many include a rain sensor that shuts the window when it starts to rain.
A fixed window lets in light but not air, and it costs the least. It suits a stairwell or a landing, or any space that has other ventilation.
Velux makes its windows in white-painted pine, which suits bedrooms and offices, and in white polyurethane, which is built for kitchens, bathrooms and other damp rooms. In an attic bathroom, choose the polyurethane finish.
Velux sizes are named by code. The common ones are CK02 at 55 by 78cm, FK06 at 66 by 118cm, MK04 at 78 by 98cm, PK06 at 94 by 118cm, SK06 at 114 by 118cm and UK04 at 134 by 98cm. We measure the rafter spacing at the survey and pick the size that fits between the rafters with the least cutting, which keeps the price down.
A roof window leaks at the flashing, not through the glass. Each roof covering needs its own kit. The tile kit, known as EDW, suits most tile profiles. The slate kit, known as EDL, suits slate and fibre cement slate. The kit is built to lap under the covering above and over the covering below, with the window frame and the gutter channel around it. A window fitted with the wrong kit, or with a kit made up on site, is the usual cause of leaks around a Velux. We use the right kit for your roof and fit an insulation collar and underlay seal inside it.
One window into an existing opening takes half a day to a day with two roofers. A new opening takes one to two days.
The roof is never left open overnight. If rain is forecast, we cover the opening and finish the next dry day.
A roof window on the rear slope of a house is usually exempted development, so you do not need planning permission. A window on a roof slope facing a public road, a Protected Structure or a house in an Architectural Conservation Area needs a check with your local authority first. We will tell you which applies at the survey.
If you are converting the attic into a bedroom, the room has to meet building regulations on ventilation, insulation, fire safety and a safe way out. The usual requirement is an escape window that opens to at least 0.33 square metres, with no side shorter than 450mm, and with the bottom of the opening no more than 1,100mm above the floor. Check your plans with an architect or engineer. Our roof condition survey guide explains what we check in the attic before any conversion.
If your window is already leaking, we can often repair it without replacing it. See our guide to leaking roofs in Galway, or our roof repair service.
Not sure who to trust? Read how to vet a roofer, and check any roofer against the CIRI register. For the window itself, see the Velux Ireland website for the full range, sizes and guarantees.
We fit roof windows with local crews in four cities. Pick yours:
Planning a bigger job? See roof replacement in Cork and the roof replacement cost guide for Ireland, and try our roofing cost calculator.
Call the office for your city, listed above, or use the contact form. A qualified roofer visits, checks the roof and the attic, and gives you a fixed price in writing. If a repair is the better call, we will say so.
A standard manual Velux roof window costs about €1,400 to €2,200 supplied and fitted in Galway and Cork, €1,350 to €2,100 in Limerick and €1,600 to €2,500 in Dublin (indicative 2026 prices). Electric or solar models run €2,400 to €4,000. A new opening in the rafters adds €400 to €1,000.
One window into an existing opening takes half a day to a day. Cutting a new opening takes one to two days, plus time for plastering and painting inside. Two windows side by side usually take a full day.
A roof window on the rear slope of a house is usually exempted development. A window facing a public road, a Protected Structure or a house in an Architectural Conservation Area needs a check with your local authority first. We tell you which applies at the survey.
Yes. We fit roof windows into natural slate, fibre cement slate, concrete tile and flat roofs. Each roof covering needs its own flashing kit, and we fit the correct one with an insulation collar and underlay seal.
Yes. Replacing a window like for like costs about €1,100 to €1,800 in Galway and Cork, and we can often reuse the same opening. If the leak is only the flashing, we can sometimes repair it without replacing the window.
A correctly fitted Velux does not leak through the glass. Leaks nearly always come from the wrong flashing kit, a missing underlay seal or badly cut slates around the frame. Fitting is what matters, which is why we use the full manufacturer kit every time.
The size depends on the rafter spacing and the head height in your attic. The common sizes are MK04 at 78 by 98cm and PK06 at 94 by 118cm. We measure at the free survey and recommend the size that fits with the least cutting.
Yes. We have local crews in Galway, Cork, Limerick and Dublin. Prices are close, with Dublin a little higher because of access and scaffold. Call the number for your city on this page for a free survey.
Attic Window Installation in Ireland. Free survey, written fixed-price quote, 10-year guarantee.