how much does it cost to put a velux window in a roof

Velux Window Roof Installation Cost: How Much?

By Michael JohnsonApril 12, 2026

Installing a Velux window in your roof can significantly enhance your home's natural light and ventilation, but it's essential to understand the costs involved. This guide will help you navigate the pricing aspects, ensuring you make an informed decision.

Velux windows are a popular choice for loft conversions and extensions, offering a sleek, modern aesthetic and excellent functionality. However, the cost of installing one can vary greatly depending on several factors. Let's delve into the details to provide you with a comprehensive understanding of the associated costs.

Factors Affecting Velux Window Costs

The total cost of installing a Velux window is influenced by various factors. Understanding these can help you budget more effectively.

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Velux Windows Prices: 2026 Installation Cost Comparison

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1. **Window Size and Type**: Velux offers a range of window sizes and types, including fixed, center pivot, and top-hung models. Larger windows and those with specific features like remote control or solar-powered operation will naturally cost more.

Window Size Options

Velux windows come in various sizes, typically ranging from 450mm to 1600mm in width and 600mm to 1200mm in height. The most common sizes are 780mm x 1600mm and 600mm x 1200mm, which cater to standard roof pitches.

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Larger windows, such as the Velux Cabrio balcony window, can cost significantly more due to their size and unique functionality.

Window Type and Features

Fixed windows are the most affordable, while center pivot and top-hung windows offer greater flexibility and convenience. Remote control and solar-powered options add to the cost but provide enhanced usability.

Labor Costs for Velux Window Installation

The cost of labor is another significant factor in your overall expenditure. The complexity of the installation and your location can impact labor costs.

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1. **Roof Type and Pitch**: Installing a Velux window on a flat or low-pitched roof is generally easier and less expensive than installing one on a steep-pitched roof. The latter may require additional safety measures and more complex installation techniques.

Complex Installations

Some installations may require additional work, such as modifying the roof structure, installing flashings, or integrating the window with existing roof windows. These complexities can increase labor costs.

Velux offers a range of installation services, including their own professional fitting teams and approved installer network. Engaging a professional ensures a safe and efficient installation, but it may come at an additional cost.

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DIY vs Professional Installation

If you're considering a DIY installation, it's crucial to assess your skills and the complexity of the job. While you may save on labor costs, a botched installation can lead to expensive repairs and potential safety hazards. Always prioritize safety and consider hiring a professional if you're unsure.

Additional Costs to Consider

Beyond the cost of the window and installation, there are other expenses to keep in mind.

1. **Building Regulations and Planning Permission**: In some cases, you may need to obtain planning permission or ensure your installation complies with building regulations. These processes can incur additional fees.

Building Regulations

In the UK, building regulations may apply if your roof space is habitable or if you're installing a window that exceeds a certain size. A professional installer can advise you on this.

2. **VAT**: VAT is currently charged at 20% on new builds and extensions but may be reduced to 5% for certain energy-saving materials and installations. Always check the latest VAT rates and rules to ensure you're aware of any potential savings.

Waste Disposal and Skip Hire

Installing a Velux window may generate waste materials, such as tiles or old roof windows. You'll need to factor in the cost of skip hire or waste disposal to ensure your site remains safe and tidy.

In conclusion, the cost of installing a Velux window can vary significantly depending on various factors. By understanding these aspects, you can make an informed decision and budget effectively for your project. Always obtain quotes from reputable suppliers and installers to ensure you're getting the best value for your money.