POTENTIAL ADAPTIVE REUSE
“In a world where we can determine which function a building can accommodate, and under what urban conditions that function can be sustained throughout the building’s second life, the architect’s role may evolve toward evaluating new possibilities through a more flexible—and perhaps freer—design process informed by urban data.”
Esma Selen Aksoy
In The Generic City, Rem Koolhaas argues for an indeterministic approach that embraces uncertainty and the transformations brought about by time as integral components of the design process. He even suggests that one day we may no longer need office buildings and that they will be transformed into housing (Koolhaas, 1995). Today, as the global housing crisis has become one of the most pressing urban challenges, this prediction—or perhaps aspiration—has gained renewed relevance, bringing together ecological, economic, and theoretical perspectives within a single architectural strategy.
Housing shortages first emerged in city centres but have increasingly expanded toward the urban periphery. While housing was primarily understood as a place of dwelling in the twentieth century, in the twenty-first century it has acquired multiple identities within the city. As housing has increasingly become an investment asset, rising housing costs and changing patterns of work have generated new modes of living, including co-living environments and accommodation for digital nomads, giving rise to an ever-growing diversity of dwelling typologies. Consequently, many countries have prioritised the development of new housing strategies. Among these, adaptive reuse occupies a distinctive position, where ideas rooted in visionary urban theories intersect with contemporary environmental approaches.
At the urban scale, this strategy resonates strongly with Constant’s New Babylon (1974), a city envisioned as a landscape of continuous movement, exploration, and transformation, where conventional notions of ownership and permanence dissolve, and with the Japanese Metabolist Movement, which advocated expandable structures, flexible design systems, and the necessity of functional transformation in the cities of the future (Kurokawa, 1977). More recently, however, adaptive reuse has been reinterpreted through the framework of the circular economy and has become an essential component of sustainable urban development. Emerging initially from concerns over the depletion of natural resources, these approaches evolved alongside Wolman’s (1965) concept of urban metabolism, which framed the city as a metabolic system and later informed broader debates on overproduction, consumption, and sustainable cities.
At the architectural scale, Yona Friedman’s proposition that no standard housing typology could ever fully respond to the uncertainty of human needs—and that the architect’s responsibility is therefore to design for indeterminacy rather than permanence—provides another important theoretical foundation for adaptive reuse (Friedman, 1975). Rather than prescribing fixed functions, architecture should create frameworks capable of accommodating change.
Although these theoretical perspectives have often been appropriated as marketing narratives for smart buildings or residential developments offering flexible shared spaces, they may unexpectedly converge in times of urban crisis, finding tangible expression through adaptive reuse. Following the COVID-19 pandemic, office buildings and shopping malls around the world experienced unprecedented levels of vacancy, while expectations of housing expanded beyond conventional definitions of domestic space. Under these conditions, adaptive reuse has re-emerged as one of the most widely adopted strategies for addressing changing urban needs. Yet this is not a new phenomenon. Throughout history, periods of economic and social crisis have repeatedly prompted cities to transform existing buildings rather than construct new ones.
One of the earliest and most influential examples can be found in Lower Manhattan, where incentive programs introduced in the mid-1990s encouraged the conversion of obsolete office buildings into housing in order to increase the residential population of the financial district. By the late 1990s, similar approaches had spread to cities including Boston, Chicago, Vancouver, Sydney, and Melbourne. In cities such as Toronto and London, high office vacancy rates caused by economic downturns and changing tenant preferences made office-to-residential conversions an essential component of urban regeneration (Remøy & Van der Voordt, 2014). Following the 2008 financial crisis, the Netherlands likewise embraced adaptive reuse on a large scale by transforming vacant office buildings into housing.
Converting an underused office building, warehouse, school, or shopping mall into housing is, in essence, the act of giving that building a second life. Yet the success of this second life depends not only on the building itself, but also on the adaptive capacity of the surrounding urban environment. In Amsterdam, where growing housing demand after 2015 accelerated office-to-residential conversions, adaptive reuse has become one of the fastest methods of housing production, particularly in the post-pandemic period. Supported by municipal incentives, these projects range from social housing to high-end residential developments, sometimes coexisting within the same neighbourhood—or even within the same building.
Today, numerous studies demonstrate the economic and environmental benefits of adaptive reuse at the building scale. My research conducted at the MIT Senseable City Lab extended this discussion to the urban scale by examining residential adaptive reuse projects in Amsterdam. Comparing housing produced through adaptive reuse with newly constructed residential developments after 2015, the study found that adaptive reuse projects generally provided stronger access to existing urban amenities while making more effective use of the city's established spatial infrastructure. Although each neighbourhood responded differently to these transformations, one characteristic remained consistent: the remarkable capacity of adaptive reuse to accelerate urban adaptation. Rather than simply transforming vacant or underutilized buildings, adaptive reuse enables cities themselves to remain dynamic, resilient, and capable of responding to changing needs.
As form and function become increasingly independent of one another, flexibility emerges as a fundamental architectural quality. Echoing the ideas presented in Non-Plan, adaptive reuse offers an alternative to the functional determinism of modernism by preparing the built environment for unforeseen social, economic, and cultural change. As transformation becomes an ordinary rather than exceptional condition, the vast amount of implicit knowledge embedded within cities can increasingly be revealed through urban data and, potentially, anticipated through artificial intelligence. In this sense, the city itself may begin to operate as an adaptive system—capable of continuously learning, transforming, and regenerating from within.
In such a context, the architect's role inevitably begins to evolve. Rather than defining a single, permanent function for a building, architects may increasingly become interpreters of urban potential—evaluating which new programs existing buildings can accommodate, predicting how these functions may interact with their surrounding urban environments, and exploring alternative futures through data-informed design processes. Urban data does not replace architectural imagination; instead, it expands the range of possibilities that architects are able to investigate, enabling more informed, flexible, and context-sensitive design decisions.
Understanding what a building can become, and equally importantly, under what urban conditions its second life can succeed, represents one of the defining architectural questions of our time. Adaptive reuse is therefore not simply the transformation of an individual building; it is a strategy for revealing the latent capacities of the existing city. Every obsolete office, warehouse, school, or shopping mall contains the possibility of supporting new forms of dwelling, production, culture, or public life. The challenge lies in identifying these possibilities and understanding the urban conditions required for them to flourish.
As Bernard Tschumi argues, the separation of form from function creates the possibility for architecture to rediscover its own autonomy. When buildings are no longer confined to predetermined programs, architecture gains the freedom to generate new spatial experiences while simultaneously responding to changing urban realities. Within this perspective, adaptive reuse becomes more than a sustainable development strategy; it becomes a design methodology capable of unlocking new tectonic, spatial, and social possibilities embedded within the existing built environment.
Perhaps the greatest promise of adaptive reuse lies in its ability to respond rapidly to moments of crisis. Whether confronting housing shortages, economic transitions, climate change, or post-disaster reconstruction, the capacity to reinterpret rather than replace the existing city offers an approach that is simultaneously ecological, economical, and adaptable. Instead of waiting for new buildings to be constructed, cities can activate the resources they already possess. Supported by urban data and emerging computational tools, adaptive reuse has the potential to transform the existing building stock into a continuously evolving urban resource—one capable of generating new forms of living while allowing cities to regenerate through adaptation rather than demolition.
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