M15 is a stylish office building in the centre of Diemen, with a dark natural stone facade, a representative entrance hall and an underground parking garage with its own side entrance. The offices are delivered as they are, with suspended ceilings with lighting, air conditioning, central heating, external sun blinds, carpeting and a pantry, and the building has a lift, toilets and changing rooms with showers. A gym is right next door, and shops, cafes and restaurants are close by.