![Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB1.jpg)
Residential extension by Dubail Begert Architectes
Swiss architecture studio Dubail Begert Architectes have completed this translucent extension of a residential building in Le Noirmont, Switzerland.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB8.jpg)
The outside stairwell frees up internal space and is made of a polycarbonate shell that allows people outside to see movement within.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB5.jpg)
The metal staircase reflects coloured light from the tinted glazed panels that change colour from floor to floor.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB12.jpg)
The illuminated interior gives the building a coloured glow at night.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB13.jpg)
Here's more from the architects:
The installation of an outside stairwell allows increases space in the cramped apartments of this building of labour apartments built in 1907.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB16.jpg)
Translucent polycarbonate shells play with reflections and transparency effects, to give to this volume an evanescent presence.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB15.jpg)
Inside, floors, stairs and ceilings are made of raw aluminum sheets.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB6.jpg)
This industrial materiality is clouded by the coloured light through the warm colours of the interior polycarbonate wall.
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB11.jpg)
![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB21.jpg)
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![Le Noirmont by dB Le Noirmont by dB](https://static.dezeen.com/uploads/2010/11/dzn_Le-Noirmont-by-dB23.gif)