Are you planning to enhance a home with natural light and fresh air? If yes, then Velux windows are a popular choice. They are known for quality and versatility. One common question homeowners and builders ask is, “Can Velux windows be custom-sized?” The answer is yes, and understanding the sizing options can help you find the perfect fit. The choice should balance aesthetics, functionality, and budget.
Standard Sizes and Range
Velux windows are available in a wide variety of standard sizes to match almost any roof space. Window widths typically range from 45 cm to 134 cm, and the heights vary between 55 cm and 223 cm.
These dimensions cover small windows ideal for bathrooms and hallways, and medium sizes are popular in bedrooms and living areas. But large options work for loft conversions or spacious studios. This broad range means most projects can be accommodated without customisation.
When and Why Should You Prefer Custom Sizes?
While Velux’s extensive standard sizing often suffices, some spaces require custom-sized windows. Unique architectural features, unconventional roof angles, or specific design preferences may require accurate dimensions beyond standard offerings. In these situations, Velux offers custom size windows, while ensuring that the most challenging or unusual roof openings can have a tailor-made solution.

Custom sizing ensures a perfect match for projects where standard windows would either be too large, too small, or poorly proportioned. This option is relevant in restoration projects, bespoke homes, or areas where maximizing daylight without structural modification is a priority.
Design Flexibility and Available Options
Velux windows are classified by types like center-pivot, top-hung, and roof terrace windows, each with different size ranges. Choosing the right type and size can enhance both lighting and ventilation as well as complement the roof’s architecture. Velux windows come with features like triple glazing, different finishes, and ventilation options. These features can be tailored to the size selected.
Customisation extends to oversized options as well, with some manufacturers offering roof windows ranging from as wide as 300 mm up to 2700 mm and lengths up to 5800 mm. These grand sizes can match ambitious architectural ideas and allow homeowners to flood their interiors with unprecedented natural light.
How to Choose the Right Size?

Choosing the ideal Velux window size depends on several factors. You can consider the room’s purpose. Usually, larger windows are ideal for living rooms where daylight enhances comfort. In smaller windows, privacy or moisture control is needed. The roof pitch, structural constraints, and desired aesthetic impact can influence size choice. It’s important to coordinate window dimensions with any blinds or shading solutions.
Before placing an order, an accurate measurement of the roof aperture is essential. Velux makes this easy with model codes on existing windows that can identify precise sizes and enable smooth replacement or upgrades.
Installation and Cost Considerations
Custom-sized Velux windows typically include higher costs and potentially longer lead times than standard models. Installation complexity may increase with non-standard dimensions. However, the investment often pays off through enhanced home value, energy efficiency, and aesthetic appeal.
Bottom Line –
Velux windows offer sizing flexibility with extensive standard sizes to match most roof spaces. Custom sizes are available for unique architectural needs, while ensuring a perfect fit without compromising quality.
Though custom windows may cost more and take longer, they can enhance comfort, energy efficiency, and home value with tailored elegance. If you need help with customising Velux windows, please contact Yorkshire Roof Windows at 07572 814560.