Velux Dormer Window Sizes: A Comprehensive Guide

Marie Jul 01, 2026

When it comes to transforming your attic into a cozy, well-lit living space, Velux dormer windows are an excellent choice. Not only do they provide ample natural light and ventilation, but they also add architectural charm to your home's exterior. However, with various sizes available, selecting the right Velux dormer window can be overwhelming. Let's delve into the different Velux dormer window sizes, their features, and how to choose the perfect one for your space.

Try These 16 Bedroom Dormer Window Ideas Smartly
Try These 16 Bedroom Dormer Window Ideas Smartly

Velux offers a range of dormer window sizes to accommodate various attic layouts and roof pitches. Whether you're aiming for a contemporary, minimalist look or a more traditional aesthetic, there's a Velux dormer window to suit your needs. But before we dive into the sizes, let's briefly understand what dormer windows are and their benefits.

Velux Loft Conversion and Dormer Loft Conversion: Which One is Better?
Velux Loft Conversion and Dormer Loft Conversion: Which One is Better?

Understanding Velux Dormer Windows

Dormer windows are a type of roof window that projects from a sloping roof, creating additional space and natural light within the room below. Velux, a leading manufacturer of roof windows and skylights, specializes in high-quality, energy-efficient dormer windows that enhance both the functionality and appearance of your home.

VELUX Roof window sizes - Find the right fit for your home
VELUX Roof window sizes - Find the right fit for your home

Velux dormer windows are available in various styles, including gable, hipped, and flat-roof dormers. They can be installed in new constructions or retrofitted into existing roofs, making them a versatile solution for homeowners looking to maximize their living space.

Benefits of Velux Dormer Windows

the different types of windows and how they are used to make them look like houses
the different types of windows and how they are used to make them look like houses

Improved Natural Light: Velux dormer windows allow abundant natural light to flood your attic space, reducing the need for artificial lighting during the day and creating a bright, inviting atmosphere.

Increased Headroom: By extending the roof, dormer windows provide additional headroom, transforming your attic into a comfortable, functional living space. This extra space can be used for various purposes, such as bedrooms, bathrooms, or home offices.

Velux Dormer Window Styles

New Velux Cabrio installed at Forth
New Velux Cabrio installed at Forth

Gable Dormers: Gable dormers have a triangular-shaped roof that matches the pitch of your existing roof. They are ideal for creating a traditional, symmetrical look and can be installed on both sides of your attic for balanced aesthetics.

Hipped Dormers: Hipped dormers have four sloping sides, creating a pyramid-like shape. They are perfect for adding a touch of elegance and sophistication to your home's exterior and can be installed on various roof types.

Velux Dormer Window Sizes

a bed sitting under a window next to a book shelf
a bed sitting under a window next to a book shelf

Now that we've covered the basics of Velux dormer windows let's explore the different sizes available. Velux offers dormer windows in various widths and heights to accommodate various attic layouts and roof pitches. The most common Velux dormer window sizes are:

Standard Sizes

how to make a paper house step by step with instructions for building the roof and windows
how to make a paper house step by step with instructions for building the roof and windows
Stunning Skylights Create Windows to the World in Old House Reno
Stunning Skylights Create Windows to the World in Old House Reno
a poster with instructions on how to build a dormer window for your home or office
a poster with instructions on how to build a dormer window for your home or office
four different views of a white house with yellow shingles on the roof and windows
four different views of a white house with yellow shingles on the roof and windows
a bed sitting under a window in a bedroom
a bed sitting under a window in a bedroom
a bathroom with a sink, toilet and shower in it's attic dormer
a bathroom with a sink, toilet and shower in it's attic dormer
Dormer Windows - Photos & Ideas
Dormer Windows - Photos & Ideas
Dfaguimba
Dfaguimba
Konfigurator für Dachfenster und Hitzeschutz
Konfigurator für Dachfenster und Hitzeschutz
a bed sitting under a window next to a book shelf
a bed sitting under a window next to a book shelf
an attic bedroom with skylights and pillows on the windows sill, along with a couch
an attic bedroom with skylights and pillows on the windows sill, along with a couch
Velux kombiniert Dach- und Fassadenfenster für ein über die Traufkante laufendes Lichtband
Velux kombiniert Dach- und Fassadenfenster für ein über die Traufkante laufendes Lichtband
Charming Deep Dormer Window Ideas for Cozy Home Spaces
Charming Deep Dormer Window Ideas for Cozy Home Spaces
Quelle est la taille maximale d'une fenêtre VELUX® ?
Quelle est la taille maximale d'une fenêtre VELUX® ?
a bedroom with three large windows and a green chair in the middle of the room
a bedroom with three large windows and a green chair in the middle of the room
a bed sitting under two windows in a bedroom
a bed sitting under two windows in a bedroom
You’ll Fall in Love With These 10 Dormer Windows
You’ll Fall in Love With These 10 Dormer Windows
25+ Attic Window Design Ideas to Transform Your Space
25+ Attic Window Design Ideas to Transform Your Space
Flat Roof Skylights, Small Attics, Skylight Installation Diagram, Velux Solar Skylight Installation, Skylight Size Chart, Velux Ridgelight, Velux Skylights Perth, Budget-friendly Skylight Heat Reduction, Small Attic Spaces
Flat Roof Skylights, Small Attics, Skylight Installation Diagram, Velux Solar Skylight Installation, Skylight Size Chart, Velux Ridgelight, Velux Skylights Perth, Budget-friendly Skylight Heat Reduction, Small Attic Spaces
a chair sitting on top of a hard wood floor under a skylight next to a window
a chair sitting on top of a hard wood floor under a skylight next to a window

Velux offers standard dormer window sizes that cater to most attic spaces. These sizes range from 1500mm to 2500mm in width and 780mm to 1680mm in height. The most popular standard sizes include:

  • 1500mm W x 780mm H
  • 1980mm W x 780mm H
  • 2480mm W x 780mm H
  • 2000mm W x 1680mm H

Custom Sizes

For homeowners with unique attic layouts or specific design preferences, Velux offers custom dormer window sizes. Custom sizes can be ordered in widths ranging from 1200mm to 3000mm and heights from 780mm to 2480mm. Custom sizes allow you to create a truly personalized living space that caters to your specific needs and desires.

Choosing the Right Velux Dormer Window Size

When selecting the perfect Velux dormer window size for your attic, consider the following factors:

Attic Layout

Measure your attic space to determine the maximum width and height that can accommodate a dormer window. Keep in mind that larger windows will provide more natural light and headroom but may require additional structural support.

Roof Pitch

The pitch of your roof will determine the size and style of dormer window that can be installed. Velux offers dormer windows designed for various roof pitches, so it's essential to consult their sizing charts or speak with a professional to ensure the best fit for your roof.

Design Aesthetics

Consider the overall appearance of your home and choose a dormer window style and size that complements your home's architecture. For example, a gable dormer may be more suitable for a traditional-style home, while a hipped dormer could add a touch of elegance to a contemporary home.

Incorporating Velux dormer windows into your attic conversion project can transform your once-unused space into a cozy, well-lit living area. By understanding the different Velux dormer window sizes and styles available, you can make an informed decision that enhances both the functionality and appearance of your home. So, why wait? Start exploring the world of Velux dormer windows today and unlock the full potential of your attic space.