I didn't ask about the chairs, you could ask the architect and perhaps she can ask the homeowner for you:
http://www.houzz.com/pro/info310/burobois
The chairs are designed by Friso Kramer they are named Revolt and produced by Ahrend in the Netherlands. www.ahrend.com
They are a reproduction, so you can sometimes find the original ones in a vintage shop. for example at www.pamono.com
Margot Hartford Photography
buroBois