Although the work of Henri Lefebvre has become better known in the English speaking world since the 1991 English translation of his 1974 masterpiece, The Production of Space, his influence on the actual production of space, of architecture and the city, has been less pronounced. Even if he is now widely read in schools of architecture, planning and urban design, Lefebvre's message for practice remains elusive; inevitably so because the entry of his work into the consciousness of the Anglosphere has come with repression of the two most challenging aspects of his thinking: romanticism and utopia, which simultaneously confront modernity while being progressive. Arguably, contemporary discomfort with romanticism and utopia obstructs movement of Lefebvre's thinking from being an object of theoretical interest to actually influencing practice. Utopia is the lynchpin of Lefebvre's enterprise. Understanding and acting upon architecture and the city with Lefebvre but without utopia impoverishes his theoretical construct. His ideas on practice and the methods he elaborated are fundamentally utopian. Although utopia may seem to have no place in the present, Lefebvre reveals this as little more than a self-serving affirmation that 'there is no alternative' to social and political detachment. Demanding the impossible may end in failure but doing so is the first step towards other possibilities. To think about Lefebvre is to think about utopia, and thinking about utopia when thinking with Lefebvre is to make contact with what is most enduring about his project for the city and its inhabitants, and with what is most radical about it as well. Lefebvre for Architects offers a concise account of the relevance of Henri Lefebvre's writing for the theory and practice of architecture, planning and urban design. This book is accessible for students and practitioners who wish to fully engage with the design possibilities offered by Lefebvre's philosophy.