Window extensions

VELUX Extensions

VELUX logo
As seen on tv

As Seen

A new TV ad campaign entitled 'VELUX Extensions' is showcasing VELUX roof windows and VELUX rooflights in inspirational home extensions across the country.

With over 70 years at the top of the roof window market, VELUX windows are proven to fill homes with twice as much daylight as competitor windows, lighting up lofts, kitchens, bathrooms and bedrooms worldwide.

Sterlingbuild are proudly the UK's largest independent seller of VELUX windows. We offer a wider choice of VELUX products than any other online retailer at unbeatable prices guaranteed by our Price Match Promise. Why would you shop VELUX anywhere else?

Shop now by VELUX window type

Pitched Roof

pitched roof windows from VELUX installed in loft conversion

Electric Windows

remote controlled pitched roof VELUX INTEGRA windows

Flat Roof Windows

VELUX Flat roof windows installed in kitchen extension

CABRIO Balcony

VELUX CABRIO balcony installed in converted loft

Sun Tunnels

VELUX sun tunnels installed in dark store cupboard


VELUX blinds installed onto pitched roof windows in converted loft bedroom
VELUX and home renovations are a match made in heaven. As well as filling spaces with an abundance of natural light, VELUX windows will improve the size, appearance, temperture and safety of your new room too.
For inspiration on home improvements, whichever type of extension you might be designing or building, visit our Extension Hub for guidance and ideas on loft conversions , basement conversions , garage conversions ,  kitchen extensions ,  single storey extensions and more.

Transform the Look & Feel of Your Extension

The potential of VELUX windows to transform the appearance and comfort of a room is enormous. Whether you have a pitched or flat roof, a VELUX product exists that will greatly enhance the brightness, airiness, healthiness and views of any space.

VELUX’s all-embracing range caters for all tastes and needs. If your extension project involves a new or altered kitchen area, VELUX roof windows can get rid of cooking aromas and steam without you having to open doors. For added ease of operation, VELUX INTEGRA windows can be opened at the click of the button and come equipped with a practical rain sensor, a blessing when you are out of the home and the heavens open.        

VELUX flat roof extension with 3 rooflights
VELUX rooflight in dining room extensions white finish

As well as being ahead of the game in light transmittance, VELUX rooflights and windows carry extraordinary low U-values which guarantee to make the temperature in your extension more comfortable and sensible the whole year round. These two qualities make VELUX windows an even smarter investment in the long run, as money is saved on energy bills. 

To make your extension an even more comfortable and calm space, consider VELUX noise reductions windows to mute unwanted noise pollution. To complement your home interiors, white paint, polyurethane and pine windows are available from VELUX to ensure you do not have to compromise anything on the aesthetical appeal of your décor. 

Remember, the bigger the roof window and greater number of them, the more natural daylight you and your family can enjoy. 

VELUX® Extension 360° Experience

To help you visualise first-hand how powerful the potential of VELUX windows is to bring a new or existing extension to life, VELUX has created a ‘before and after’ 360° Extension Experience.

Get a clearer idea of how VELUX windows can transform a living space by trying the VELUX Extension 360° Experience yourself. 

Remember, all windows featured are available at Sterlingbuild, the UK's largest independent online VELUX retailer. Many of our products are available for next day delivery.


Try The VELUX 360° Extension Experience


VELUX flat roof extension with pitched windows