This deals with the somewhat vexing question of human productivity in the workplace. Vexing because we do not think that this subject is as mysterious as many do. We set out to answer the question, ‘What features of workplaces under the control of designers and managers signiﬁcantly inﬂuence human productivity?’ The main theme is how individual occupants are affected. We are seeking building features that most readily improve or hinder human productivity at work. The ﬁndings can then be used in the briefmaking, design and management processes. We deliberately stick to factors that are under the direct control of building designers and facility managers; not to wider aspects like stress, lifestyle and organisational culture.