The Dutch architects Bronsvoort Blaak Architecten are well-known for their environmentally sensitive interiors, and a great example is their design of the offices of the major construction company Bouwbedrijf Kreeft BV. Here, working with the international stairs specialists, EeStairs, they delivered interiors whose most organic features are a sculpted timber stair wall and two-storey high vine-poles. The result? A calm green vibe, in a building rated as BREEAM Official Outstanding in its low energy use.