Glass Side Return Extensions - Structural Glass

by IQ Glass

Side Return or Side Infill Extensions are popular extension types, especially in city centres. The 'infilling' of little-used side passages allows architects to widen the rear living areas and create better connections to the garden. Our glazing is often used for roofing over the new extension as well as providing premium doors to the rear of the new living or kitchen space.

By extending the rear of your property to incorporate this passage into your homes envelope you can open up your downstairs living spaces and kitchen and improve your access to the garden.

As you are generally extending out to meet the party wall in most terrace houses you will lose any side light you did achieve through the original wall. Here, using large glass roof over the whole area will maximise your natural light influx and create a much lighter space than you have previously.

Moveable glass elements such as sliding doors will allow you a much better window to your garden and will then create the indoor-outdoor effect at these points, further extending your home through the garden space.

Using flush Floor Finishes with these opening elements will make this interchange between inside and out much more seamless and greatly improve the connection to the garden, making the outside space more accessible.

These relatively small renovations and extensions can make a huge difference on how you use your home and space, and the introduction of clever glazing can greatly improve the usability and draw to the rear section of the home.

Specification Details for Glass Side Return Extensions - Structural Glass (Structural Glass)

Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that IQ Glass is consulted before specifying.

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You have to think very carefully about the drainage for glass roofs within a side return extension. You have three options:

  1. Drain the glass roof towards the rear elevation of glass of the extension.
  2. Drain the glass roof towards the party wall.
  3. Drain the glass roof back towards the existing building.

All of these options are possible but it will depend on your Party Wall Agreement and side extension design as to which ones are most suitable for your project.


90% of side return extensions include a full glass roof or partial rooflight.

As you are generally extending out to meet the party wall in most terrace houses you will lose any side light you had achieved through the original wall. Using a glass roof over the extension will maximise the natural light influx and create a much lighter space than was there previously.