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Costs of installing skylight

Wilm Everts

Skylight installation costs 2026

Installing a skylight costs between €250 and €1,050 on average, depending on the type of skylight and the complexity of the installation. A skylight provides extra light and ventilation in your home by mounting a window in the sloping roof surface. In this price guide, you can read exactly what influences the costs of installing a skylight and what you should look out for during purchase and installation.

Table of Contents

How much does it cost to install a skylight?

Installing a skylight costs on average between €250 and €1,050 per project, including materials and labour. The exact price depends on the type of skylight you choose, the dimensions, the material of the frame, and the complexity of the installation. At Zoofy, you pay no call-out charges and you know the cost of the job in advance.

Overview of skylight installation costs

DescriptionPrice
Total skylight installation costs€250 - €1,050 per project

This price range applies to standard skylights in common sizes. Costs can increase if you choose a larger window, higher-quality materials such as wood or aluminium, or if additional adjustments to the roof structure are required. Replacing an existing skylight also falls within this range, provided no structural changes are needed.

The price you see at Zoofy includes 21% VAT and labour. The affiliated professionals work with transparent price agreements, so you are not faced with surprises. Costs are calculated per project, not per hour, providing clarity on the total amount before the work begins.

Skylight costs per type

The costs for installing a skylight are mainly determined by the type of skylight you choose, the frame material, and the dimensions. The cheapest is a standard roof light in PVC, which only tilts for ventilation. Slightly more expensive is the centre-pivot window, which hinges in the middle and rotates both inwards and outwards. The top-hung window is the most expensive option because it opens fully outwards and offers more space for movement.

In addition to the type, the material plays a major role in the price. PVC frames are the most budget-friendly, while wood and zinc variants turn out to be significantly more expensive due to the high-quality materials and finish. Dimensions are also decisive: a larger skylight means more material and longer installation time, which increases the price.

Finally, brand-name skylights such as Velux generally have a higher purchase price than brands like Fakro or Winstar. If you replace an existing skylight without structural adjustments, the costs remain within the standard price range of €250 to €1,050 per project.

Price-determining factors for installing a skylight

The costs for installing a skylight vary greatly per situation. Below you can read which factors influence the price and why.

Urgency versus planned work

If you want a skylight installed urgently, the costs are higher than for a planned installation. The professional must adjust their schedule and reschedule other appointments, which takes extra time and organisation. Plan your job in advance to avoid this surcharge.

Weekend or weekdays

Work on the weekend is more expensive because the professional must work outside regular working hours. Choose a weekday if you want to limit the costs.

Size of the skylight

The larger the skylight, the more material and installation time is needed. A large window weighs more and requires extra manpower during installation. This increases both material costs and labour duration.

Material of the frame

PVC frames are the cheapest and low-maintenance. Wooden skylights are more expensive to purchase and require periodic painting to prevent moisture damage. Zinc variants are the most expensive but have a long lifespan.

Brand and quality

Velux is the best-known brand and generally more expensive than Fakro or Winstar. More affordable brands offer similar functionality at a lower price.

Extra options and versions

Electrical operation, HR++ or triple glazing, built-in sun protection, and smart home connections increase the purchase price of the skylight. These options also require more installation time, extending the labour duration.

Adjustments to the roof structure

If the skylight does not fit seamlessly within the existing tile structure, part of the roof must be adjusted. This means extra sawing, reinforcing beams, and possibly adjusting insulation. Any structural change takes more time and increases total costs.

Type of roofing

Roof tiles are easy to process and replace. Slate roofs require more precision work with cutting tools, which extends the installation time. Specialist knowledge is also required for thatched roofs.

Height of the roof

For high roofs or difficult-to-reach locations, crane hire may be necessary to safely bring the skylight up. A crane costs an average of €100 per hour. Scaffolding material may also be needed, which increases costs.

Roof pitch

Not every skylight is suitable for every roof pitch. For flatter roofs, special structures or sills are needed to drain rainwater properly. This requires extra material and adapted installation.

Roof orientation and sun exposure

A south-facing skylight catches more sunlight and heat. Without good sun protection, this can lead to overheating. Installing sun protection or integrated screens directly increases installation costs.

Permits and regulations

For monumental buildings or in protected cityscapes, a permit may be required before you can install a skylight. The application costs time and money. Inquire with your municipality beforehand.

Insulation values of the glazing

HR++ or triple glass is more expensive than standard glazing but reduces your heating costs and increases living comfort. The investment pays for itself through lower energy bills.

Location and accessibility

If the workplace is easily accessible and materials can be stored nearby, installation proceeds faster. Remove obstacles in advance so the professional can get straight to work.

Additional costs and surcharges

Extra costs depend on the specific situation. At Zoofy, you pay no call-out charges.

  • Urgency surcharge: A surcharge applies to urgent jobs because the professional must adjust their planning
  • Weekend surcharge: Work on the weekend is more expensive than during the week due to work outside regular hours
  • Crane hire: For installation at great heights, crane hire is necessary, averaging €100 per hour
  • Extra work: Adjustments to the roof structure, extra insulation work, or installing special finishes can increase costs

How does the professional work when installing a skylight?

Installing a skylight follows a fixed sequence of steps to guarantee a watertight and safe installation.

  1. Preparation and inspection: The professional inspects the roof, checks the structure, and takes measurements for the skylight. They assess whether adjustments to roof rafters are necessary.
  2. Removing roofing: Roof tiles or slates around the planned opening are carefully removed and set aside for reuse.
  3. Cutting the opening: The opening is accurately cut into the roof surface. If necessary, roof rafters are adjusted or reinforced for a sturdy construction.
  4. Placing the frame: The frame is placed level and square in the opening and firmly attached to the roof structure.
  5. Installing the window and sealing: The window is hung in the frame. Special flashings and sealing strips guarantee watertightness around all connections.
  6. Replacing roofing: Roof tiles or slates are replaced with correct lead flashings. The outside is checked for watertightness. The inside receives insulation and finishing strips.
  7. Final check: The professional tests the operation and checks all connections. Installing a standard skylight takes half a to a full working day. Ensure the attic is accessible before the professional begins.

How can you save on installing a skylight?

There are several ways to reduce the costs of installing a skylight without compromising on quality.

  • Replace on time: Do not wait until an old skylight starts leaking. Addressing small problems early is more economical than repairing major moisture damage to insulation and roof structure.
  • Clear up in advance: Empty the attic and ensure the workplace is easily accessible. This saves the professional labour time, which reduces costs.
  • Plan during the week: Do not book on the weekend or as an urgent job. Planned work during the week is cheaper because no surcharge applies.
  • Consider a renovation window: When replacing, a renovation window can be placed over the old frame. This is faster and cheaper than creating a new opening.
  • Choose the right season: Plan the installation during dry periods such as spring or autumn. This reduces the risk of delay and keeps costs within budget.
  • Book via Zoofy: You get a fixed rate in advance, without call-out charges and without surprises. You only pay after the job is completed.

Common problems with skylights

Problems with skylights can have various causes and lead to discomfort or damage.

Condensation

Condensation occurs due to the temperature difference between inside and outside, combined with high humidity. You recognise this by fogged windows and moisture on the frame. With long-term condensation, the frame can be damaged and insulation weakened.

Leakage

Leaks occur due to outdated seals, clogged drainage channels, or installation errors. Rainwater then penetrates through the edges or under the lead flashings. This leads to moisture damage to the roof and ceiling.

Mould formation and wood rot

If moisture remains present for a long time, mould develops on the frame and walls. In wooden skylights, wood rot can occur, weakening the frame. This significantly increases the costs for replacement.

Poor insulation

Old skylights with single or outdated double glazing lose a lot of heat. You notice this through drafts, cold zones, and higher energy costs. Replacement with modern HR++ glass solves this.

Find the best professional for installing a skylight

A reliable professional guarantees correct installation and lasting watertightness of your skylight.

  • No call-out charges: You only pay for the work itself, never extra for the professional's arrival.
  • Fixed price in advance: You know exactly what you pay before the job starts, without surprises later.
  • Book quickly without quote hassle: Reserve a time slot directly and have your skylight installed without long waits for quotes.
  • Payment via QR code after completion: You only pay when the job is fully finished and you are satisfied.
  • Reliable, screened professionals: All affiliated professionals are pre-screened for quality and reliability.
  • Insured up to €2.5 million: When working through Zoofy, you are covered for any damage during installation.

Frequently asked questions about installing a skylight

What does it cost to install a skylight?

Installing a skylight costs on average between €250 and €1,050 per project, including materials and labour. The exact price depends on the type of skylight, dimensions, frame material, and whether structural adjustments are needed to the roof.

What does it cost to install a Velux skylight?

The costs for replacing a Velux skylight are generally at the high end of the price range due to the brand's higher purchase price. The installation costs themselves do not differ by brand, but the Velux window is more expensive to purchase than brands like Fakro or Winstar.

What does a skylight in the attic cost?

The costs for installing a skylight in the attic fall within the same price range of €250 to €1,050. Height and accessibility can influence the price; for difficult-to-reach attics, crane hire or extra scaffolding material may be required.

Which is cheaper, Fakro or Velux?

Fakro skylights are generally cheaper to purchase than Velux. Both brands offer similar functionality and quality, but Velux is the premium brand with a higher price.

How long does it take to install a skylight?

Installing a standard skylight takes an average of half a to a full working day. In more complex situations, such as adjustments to the roof structure or working with slate roofs, installation may take longer.

Do I need to provide the skylight myself?

This can be arranged in consultation with the professional. It is often more convenient to arrange this through the professional so that the correct dimensions, specifications, and warranty conditions are guaranteed.

Do I need a permit for a skylight?

For monumental buildings or protected cityscapes, a permit is often required. For standard homes and replacement of existing skylights, a permit is usually not required. Inquire with your municipality beforehand.

How do I prevent condensation on my skylight?

Ensure good ventilation in the room, choose HR++ glazing, and use the tilt position of the window for constant air circulation. This reduces humidity and prevents condensation.

How often should I maintain my skylight?

PVC skylights require little maintenance, only regular cleaning. Wooden skylights must be painted every four to six years and hinges require annual lubrication maintenance.

What happens if it rains during installation?

An experienced professional will seal temporarily and plan the job so that the risk of water damage is minimal. Dry periods in spring or autumn are ideal for installation.

Book a professional now for skylight installation

At Zoofy, you can book a professional directly. You will see exactly what it costs in advance, and Zoofy connects you with a checked professional. You only pay once the work is finished.