In increasingly denser urban environments, there is a new-found interest in underused spaces as opportunities for further development. Representing up to 25% of cities' land area, rooftops are among the most exciting spatial resources. From sustainable infrastructure and urban farming to social spaces and cultural venues, the article looks into the potential of creating a multi-layered city through the activation of urban rooftops.

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The International Placemaking Week, presented by Project for Public Spaces (PPS) is an inspiring and engaging event designed as a global gathering of placemakers from different sectors to discuss thoughts and share strategies in order to push forward the concept of placemaking in the host city and on an international level. Previous editions took place in Vancouver in 2016, Amsterdam in 2017, and Chattanooga, Tennessee in 2019.

PPS, the nonprofit organization behind Placemaking Week, helps people create and sustain public spaces that build strong communities. In 1999, they elaborated “How to turn a place around”, a book that defined the placemaking movement, creating a guideline of 11 principles to follow in order to create vibrant community spaces.

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Since the 1990s, copious amounts of cities in China have been undergoing urban renewal. Prompted by this state-facilitated urban redevelopment, skyscrapers are being built rapidly in major cities to attract affluent middle-classes, resulting in countless relocation and displacement of the working-class population. Such process is known as “gentrification”.

As cities and neighborhoods are being gentrified thoroughly to meet middle-class taste and boost economic growth, urban land resources are being treated in ways to increase business potential, leaving little room for the development of urban street life. Among rows of concrete and steel constructions, nowadays, urbanites are struggling to find a place to sit, rest, and play during leisure time. Analyzing five architectural practices creating livable urban public spaces, this article discusses the challenges and opportunities of urban revitalization in China under the phenomenon of gentrification.

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Normally the efforts of the construction industry are aimed to design permanent and durable spaces. However, on some occasions creating temporary spaces can be of great help, not only when providing fast assembly infrastructure after the effects of a natural disaster, but also when activating residual or abandoned spaces in our cities. To exemplify the potential of these interventions, we present thirteen successful temporary public spaces.

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