Architectural Cases

In a significant architectural endeavor, the American studio Skidmore, Owings & Merrill (SOM) is bringing to life a new skyscraper at 400 Lake Shore in Chicago, a site previously designated for the ambitious but ultimately canceled Chicago Spire. This towering structure, projected to reach 841 feet (256 meters), is scheduled for completion in 2027. Recent photographic evidence from late last year confirms that the building is now nearly half-finished, showcasing substantial progress.

Construction Progress and Innovative Design at 400 Lake Shore

The construction of the 400 Lake Shore skyscraper, designed by SOM, has reached a critical phase. With its glass facade and distinctive terracotta mullions partially installed, the building's rectangular form elegantly aligns with the Chicago River, situated on a unique landmass between the river and a nearby slip. This project marks a significant triumph over a nearly two-decade-long series of construction setbacks that plagued the site. The original plan for a 2,000-foot-tall Chicago Spire, first proposed in 2007 by Spanish architect Santiago Calatrava, was abandoned following the 2008 financial crisis, leaving behind a massive 75-foot-deep excavation known as the “Spire Hole.”

SOM's approach to the new skyscraper involved ingeniously incorporating the existing foundations. Faced with the challenge of adapting a design different in scale and height from the original Spire, SOM opted to work with the legacy infrastructure rather than remove it. They introduced a structural mat slab over the deep foundations, allowing for flexible positioning of new shear walls and primary load-bearing elements. This strategy not only maximized the reuse of previous investments but also necessitated an extensive preparatory phase, including pumping out approximately three million gallons of water that had accumulated in the long-dormant foundations.

The construction process is being accelerated by simultaneous work on both the sublevels and the main tower, a method that SOM initiated in early 2024. The building's core features reinforced concrete, supplemented by two belt-and-outrigger wall systems. Recognizing Chicago's notorious winds, SOM utilized its in-house wind tunnel system to engineer a structure capable of withstanding the amplified wind pressure from Lake Michigan. This commitment to environmental performance is central to the design philosophy, eliminating the need for additional tuned mass dampers and guiding the development of the podium and landscape to mitigate pedestrian-level wind effects. While one tower is well underway, the timeline for a proposed second tower remains uncertain.

SOM has a storied history in shaping Chicago's skyline, including the iconic Willis Tower (formerly Sears Tower). Other architectural firms have also contributed to the city's celebrated Riverfront, such as Studio Gang, whose St. Regis skyscraper boasts a striking blue-hued facade and a tiered design. The photography for the 400 Lake Shore project is credited to Dave Burks for SOM.

The development of the 400 Lake Shore skyscraper by SOM is more than just a construction project; it's a testament to resilience, innovative engineering, and architectural prowess. Overcoming decades of stalled plans and technical hurdles, this endeavor showcases how a deep understanding of urban context and environmental factors can lead to transformative structures. It highlights the importance of adaptability in large-scale urban development and offers valuable lessons in repurposing existing infrastructure. This project not only adds a striking new feature to Chicago's famous skyline but also reinvigorates a site that once symbolized urban ambition's limits, turning it into a beacon of modern architectural achievement and sustainable design. It reminds us that even the most challenging sites can be reimagined and revitalized with vision and ingenuity.

In a remarkable urban renewal initiative, a long-abandoned Brutalist office structure in Croydon, London, has been given a new lease on life. The transformation, spearheaded by the architectural firm ShedKM, has converted the derelict Zodiac House into 73 modern, temporary residences for families in urgent need of housing. This project not only breathes new purpose into an aging edifice but also integrates vital community spaces, offering a beacon of hope and revitalization to the Broad Green area.

London's Zodiac House Reimagined: A Blueprint for Adaptive Urban Development

In the vibrant borough of Croydon, London, a compelling architectural narrative has unfolded with the completion of the Zodiac project. The saga began in 2020 when Common Projects acquired Zodiac House, a Brutalist office block dating back to the 1960s, which had languished in disuse for over a quarter-century. This acquisition marked the genesis of a visionary plan to repurpose the robust concrete-framed building into much-needed temporary accommodation, addressing the pressing issue of homelessness in the region.

Under the meticulous guidance of UK studio ShedKM, the once-neglected office space, originally a component of a larger complex that included the iconic Zodiac Court, has been painstakingly transformed. The redesign has yielded 73 diverse residential units, encompassing one, two, and three-bedroom homes. Beyond mere housing, the project has thoughtfully incorporated a new public green space, Broad Green Common, and a dedicated community pavilion, fostering an environment of communal well-being.

Ella Flint, the architectural lead at ShedKM, highlighted the inherent potential of the building for such an overhaul. Its strategic location, close to essential transport networks and local amenities, combined with a structural grid perfectly suited for conversion, presented an ideal canvas for adaptive reuse. A core challenge was to shift public perception while meticulously preserving the building's distinctive architectural identity. The design philosophy championed by ShedKM involved working harmoniously with the existing structure, enhancing its original state rather than erasing its historical footprint.

The building's U-shaped layout was cleverly utilized, arranging apartments along a central corridor with views either towards the bustling city or the serene, revitalized courtyards. Previously connecting the courtyards, single-storey undercrofts were ingeniously converted into internal communal areas, including a residents' lounge, and provided seamless access to the newly landscaped green space at the eastern entrance. Externally, the building's brutalist charm was conserved through the retention of its pebbledash spandrel panels and concrete fins. Original single-glazed windows were upgraded to double glazing and complemented by grey metal panels. The entrances, adorned with distinctive zodiac plaques, inspired a palette of deep green metal panels, a hue carried through to the interiors. These blue-green accents define communal spaces, aiding wayfinding and adorning apartment doors, leading residents into bright, white-painted living areas.

The newly unveiled Broad Green Common, designed in collaboration with landscape architects Planit, has reclaimed a neglected paved parking area, transforming it into a verdant oasis. At its heart lies a 70-square-meter community pavilion, currently home to the Croydon Smile Hub. This pavilion is a testament to resourcefulness, being a repurposed cross-laminated timber structure originally conceived by ShedKM as a sales booth for a different venture. As Flint eloquently articulated, the project endeavors to restore the 'Green' to Broad Green, offering invaluable public green space back to the community.

A Catalyst for Urban Regeneration and Community Resilience

This project serves as a powerful reminder of how innovative architectural design can address critical social needs while honoring urban heritage. The transformation of Zodiac House into a vibrant residential and community hub exemplifies a sustainable approach to urban development. It not only provides essential housing for vulnerable families but also creates shared spaces that foster connection and support, ultimately strengthening the fabric of the community. This endeavor underscores the potential of adaptive reuse to breathe new life into dormant structures, turning them into dynamic centers of community activity and a testament to the power of thoughtful design in creating more inclusive and resilient cities.