Velux Windows Prices

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Average Velux windows cost

The average cost of Velux windows is £900. Costs can change based upon the materials and the firm hired. The upper price range can be as high as £1035. The material costs are commonly about £225

Average price per Velux windows job in 2026

Avg. price low

Avg. price low
£764

Avg. price

Avg. price
£4,995

Avg. price high

Avg. price high
£9,220

£9800

£7350

£4900

£2450

£0

Prices based on actual Velux windows costs for your area, as reported by local LeadsDoWork members.

Velux windows installation cost in your area 2026

Labour cost £630
Material cost £225
Waste removal £45
Time frame: 1-2 days

Advantages for Velux windows

  • Roof skylights help rooms in homes that have poor lighting or no other means of natural sunlight
  • Skylights offer a nice view outside which can potentially increase the value of the property if installed properly
  • Small rooms can appear significantly bigger when illuminated natural with light from a Velux style window
  • Energy savings can be made with the correct choice of skylight: one that can be opened if the room is too warm but also is insulated for colder days

Disadvantages for Velux windows

  • Badly fitted skylights can lead to leaks which cause significant damage to the property
  • Selecting the wrong type of glass can result in the room getting too much heat making the space uncomfortable during the summer

Velux windows Manufacturers

Velux windows FAQs

How to plasterboard around a Velux window?

While it sounds like it could be difficult to plasterboard around a Velux window, it needn’t be. As long as you have the right tools and materials, you should be able to plasterboard around your roof window easily and make good ready to be skimmed. When you or a tradesperson has fitted your Velux window into your roof, you’ll probably need to plasterboard over it to create a good ceiling. To do this, you’ll need:

  • Plasterboard sheets – make sure you measure your room so you know how much you’ll need
  • Screws to secure the board in place
  • Drill
  • Hammer
  • Straight edge and pen knife to score the board before trimming
  • Fine toothed saw the cut the plasterboard

When you’re ready to plasterboard around your roof window, make sure you’ve cleared enough space to work in. Then you can begin by cutting your plasterboard to size using your straight edge and pen knife to score, then your saw to get a clean cut. A common way of plasterboarding around your Velux window is to use the groove on the window frame to hold one edge of the board, then screw the other edge to the battens on the ceiling. People often use drywall screws these days as they have a better grip of the plasterboard as they drive through. You’ll need to use a drill to screw these in. However, you could use plasterboard nails, which are galvanised to stop rusting. When you’ve done this, you can then skim the walls or ask a plasterer to do it for you. Plastering, while it looks easy, is a tricky skill so it’s always best to ask a professional to do it.

How to remove a Velux window?

It’s relatively simple to remove a Velux window, whether it’s Velux-branded or is another brand of roof window. Here is a breakdown of the steps you’ll need to take to remove a roof window:

  1. Remove the sash (opening part) from the roof window frame. Usually there are screws in the hinges to loosen or a button to press and lift out.
  2. Next, remove the tiles or slates from around the window frame along with the flashing.
  3. Unscrew all the brackets around the window frame and lift out the frame.

It’s that simple! You can do all of this from inside your home – there's no need to climb on the roof. Removing the glass pane from a Velux window, for example if it has blown, is a more difficult job and should be left to a professional. It involves removing the sash from the roof window frame and then removing the surrounding parts of the sash to lift out the sealed unit. They will then place the new glazed unit into the sash frame before securing all the parts back onto the sash and fitting it back into the roof window frame.

How to fit a velux window into a slate roof?

Fitting a Velux window into a slate roof is very similar to the way you’d install it in other roof types. All roof windows, whether a Velux-branded one or not, will come with detailed instructions for you to follow if you want to have a go at fitting it yourself. But here are some brief instructions to give you an idea of what’s involved in installing a Velux window into a slate roof:

  1. After you’ve removed the Velux window from its packaging, remove the sash (the part that opens) from the frame, according to the manufacturer’s instructions.
  2. Next, you need to prepare the opening for the window. You can often cut through the felt, remove one of the battens from under a slate, then slide all the slate tiles into the roof space. You should then make the cut 40-60mm wider than the window, cutting away roof timbers then replacing them with more around the opening to strengthen it.
  3. The roof window’s bottom brackets need to be installed on one of the existing battens for the slate roof. One of the slate courses should line up 105mm below the top edge of the batten you use.
  4. Then, measure from the top edge of the batten upwards to the height of the window plus 45mm. This is where the top installation batten should be installed, with an overhang of 100mm on each side.
  5. Remove the course of slates below the window, trim any excess felt and fold it over the surrounding timber. This helps with waterproofing.
  6. Add the insulation collar according to the Velux window manufacturer’s instructions.
  7. Place the frame in the opening, adding the brackets according to the instructions. You’ll find that lots of roof windows have pre-drilled holes to make it easy for you.
  8. Replace the sash and line up the hinges. Take a look at the opening at the bottom between the sash and the frame – it should be even along the entire width. Remove the sash again to fix the upper brackets according to instructions.
  9. Add the underfelt collar for your roof window as instructed by the manufacturer, then replace any slates at the bottom. You might need to cut them to size.
  10. Next, add the flashing according to the instructions, along with any parts that are not yet attached, including the hood section and top flashing piece.
  11. Replace all the slates around the window, allowing 60-100mm of space between the course of slates above the window and the top of the window to allow for rainwater drainage. Then replace the sash into the frame again.
  12. Add the vapour barrier on the inside of the window using the screws provided, then tape it to the existing vapour barrier to prevent moisture from reaching your roof structure.

And that’s it! If you think that sounds a bit complicated, ask a roofer or window installer to fit your roof window into a slate roof for you. You’ll get a better finish and you can be sure that you won’t get any leaks from a botched installation.

What is the Velux Active home kit?

Velux installers offer the Velux Active home kit. This provides an automated system to enhance your indoor living. With its sensor-based ventilation apparatus, the Velux active home kit’s smart sensors repeatedly monitor your home’s temperature, humidity and CO2 levels for its optimum healthy living standards.

Sensor-based ventilation
Velux Active tracks temperature, humidity and CO2-levels, and ventilates to keep your indoor climate nice and healthy.

Automatic heat protection
Velux Active automatically protects your home from excessive heat by closing your Velux Integra blinds, awnings and shutters on hot days.

Set personal preferences
Want to swap your alarm clock for a sunrise or air out while you’re at work? Customise your indoor climate with Velux Active.

Voice-control and smart speaker integration come standard with VELUX ACTIVE with NETATMO, enabling you to draw the shades or open the windows just by asking.

What is a Velux window?

A Velux window is a brand of roof window, but the brand is so popular that people often use the name to describe the entire type of window. They are windows that are installed at the same orientation and ‘in plane’ with the surrounding roof, and they’re usually installed at a minimum of a 15-degree pitch. You can buy roof windows that offer completely frameless internal views for a really clean look in your loft conversion, while some come with built-in shutters.

Velux windows aren’t to be confused with rooflights which usually refers to a glazed unit that’s installed on a flat roof. It might also mean a window that’s been installed on a pitched roof out of plane with the level of the tiling.

People also confuse roof windows with skylights, which normally can’t be opened or closed and are usually smaller than Velux windows. Skylights, therefore, only let daylight into the room whereas roof windows also help with ventilation.

If you’re using your loft as a room in your home rather than simply for storage, you must have a roof window installed. Skylights won’t be enough as they don’t allow for ventilation. It doesn’t have to be a Velux window – it can be any type of roof window. Luckily, they tend to come in standard sizes and they must be CE marked if they’re sold as a roof window, so they should be easy to find.

How much are Velux windows?

Velux windows are a great way to add lots of light to your loft space. Velux is actually the name of a brand of roof window – not to be confused with roof lights, which are usually installed on flat roofs, or skylights, which are normally used to add natural light into a room without being able to open it. Roof windows open like regular windows and are fitted within your roof. But how much are Velux windows? Whether you choose a Velux window or another brand of roof window, they’re not cheap. Since they require special installation, including cutting roof timbers and replacing them to keep the structure strong enough, they take longer to install than a normal double glazed window. It can take up to a day to install a large Velux window, and it could set you back anywhere between £1,600 and £2,000. If you only need a small roof window in an area like a bathroom, you can expect to pay up to £1,300 for it to be fitted. Usually, there won’t be any need for scaffolding or towers because Velux windows are designed to be installed from the inside of your home. However, it’s worth setting aside an additional £500 in your budget in case unexpected problems occur and an installer needs to get on your roof to finish fitting the window. All of these prices are based on a standard roof window without any additional features. If you want to be able to control your windows with an electric switch or remote, this could set you back as much as an additional £400. For extra-low energy glass, you can expect to pay up to £200 more.

How to clean Velux windows?

Velux windows, or roof windows, are very easy to clean. Regular cleaning helps to keep them looking bright and shiny for years to come. So how should you clean Velux windows?

If you want to clean the air filter, you can remove it and wash it with your normal household cleaners. Velux windows have a cleaning position, so rotate and secure it into this position then remove the filter. You should be able to buy new filters from the manufacturer of your roof window.

To clean the outer pane, there’s no need to lean out of the window and risk falling out. Simply rotate the sash (the opening part) 180 degrees and secure it into position. Then you can clean the pane with a soft, lint-free cloth, sponge or squeegee and clean water. If you live in a hard water area, add some detergent to the water and wipe the window dry when you’re finished. You can also use normal non-abrasive household cleaners.

It’s recommended that you clean the flashing around your roof window at least once a year. You can use a brush to do this. This will allow rainwater to flow freely and stop any leaves from collecting.

If you’re in any doubt about using certain cleaners on your Velux windows, get in touch with the manufacturer who should be able to help. You can also do a patch test on an inconspicuous area if you’re unsure.

How to fit a Velux window?

Velux windows actually refer to one brand of roof window, which are windows that sit in your roof space and allow light and ventilation into your loft. But how do you install a Velux window? If you’re a competent DIYer, it’s not as difficult as you might think.

You can normally install roof windows entirely from the inside, so you don’t need to get up on your roof or hire costly scaffolding. They come with detailed installation instructions, so as long as you follow them you shouldn’t have much trouble.

Before you start, you’ll need to read up on the Building Regulations and Planning Permission laws. Speak to your local Building Control department if you have any questions.

Firstly, prepare the opening by removing enough tiles or slates from the roof. There’s no need to go out on the roof – access them by cutting away the felt underneath which will give you access to the tiles and battens. Cut away one of the battens from under a tile, then you can slide all the tiles into the roof space. You’ll need to cut away the roof timbers to make the right size opening, then add more timbers to strengthen the ones that are left.

Next, remove the opening sash from the new roof window then fit the frame into the new opening using the brackets provided with the window. Then fit roof flashing between the new window and the roof so you don’t get any leaks. Then lay your tiles back in position around the new Velux window; you’ll probably have to cut some to shape which you can do with an angle grinder. Always cut them on the ground, not in position on the roof.

Lastly, fit the sash back onto the window and you’re done!

If this sounds like too much hard work, plenty of window installers will be able to help you fit a Velux window and will probably be able to provide a much cleaner finish.

How to install Velux Windows

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AJ Roofing Contractors

Based: in Derby, DE65

AJ Roofing Contractors is based in Derby and have 8 positive reviews

AJ Roofing Contractors reviews

Andrew K., NG16
17th March 2026

Windows | Velux in Nottingham

I found the quote was more than I expected so have not yet had work done

James Building & Roofing Cambs

Based: in Huntingdon, PE28

James building & roofing Cambs
Offer the complete professional construction services . We speciali...

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Julie S., SG5
16th February 2026

Windows | Velux in Hitchin

Not only did James and Jamie install my new velux , they offered to replace my crack...

AMC Home Improvements

Based: in Cambridge, CB4

AMC Home Improvements is based in Cambridge and have 18 positive reviews

AMC Home Improvements reviews

Joanne P., PE7
23rd January 2021

Windows | Velux in Peterborough

A price was given on the doorstep and advised photos could be provided of the options...

GHBJ Home Improvements

Based: in Highbridge, TA9

Hi and welcome to our page G.H.B.J home improvements we are a family run business who take pride in ...

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Phil G., TA9
12th August 2020

Windows | Velux in Highbridge

Very laid back approach when I complained about i could not shut skylight they came b...

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James Building & Roofing Cambs

19 reviews
Based: in Huntingdon, PE28 9DL

James building & roofing Cambs Offer the complete professional construction services . We specialise in extensions, loft conversions, refurbishments, alterations, maintenance and all aspects of pitched and flat roofing . We are a very reliable comp...

AJ Roofing Contractors Ltd

8 reviews
Based: in Derby, DE65 5PX

AJ Roofing Contractors Ltd based in Derby, offer services in Windows. They have an average rating of 4 from 8 reviews. See their latest 4 star review below

Gino Jones t/a GHBJ Home Improvements

11 reviews
Based: in Highbridge, TA9 3NW

Hi and welcome to our page G.H.B.J home improvements we are a family run business who take pride in our work with over 50 years experience past down through generations, Unique home improvements specialists covering Somerset, All our work is fully...

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