Located on a site along Jakarta’s Jalan M.H. Thamrin roadway, City Tower incorporates first-class office spaces within a resurgent commercial sector. At 32 storeys and 150m in height, the building becomes a legible element on Jakarta’s skyline.
The architects of City Tower designed its massing in correspondence with the site’s unique triangular dimensions and its existing structural foundations. The form of City Tower is drawn from that of a nautilus shell. An asymmetrical shape that originates from a core and grows wider as it spirals outward, the logarithmic spiral of the nautilus is embedded simultaneously with geometric variation and order, and also suggests continuous growth.
Growth, variation and order are important characteristics of business that the designers have sought to encapsulate in the project’s architecture, and so this logarithmic curve becomes the focal point of City Tower’s design. Spiral lines of the nautilus are adopted to generate the typical 1,740sqm floor plan, centred on a point of entry on every level which empties into a circulation space linked to surrounding programmes. The curvature shapes internal spaces, and provides offices with panoramic views of metropolitan Jakarta.
The asymmetry of logarithmic curvature in plan is evident in the building’s overall form, which varies in appearance depending on the angle of view as seen from the surrounding environs. This variation is articulated in the building’s facade by a series of layered reflective surfaces, vertical fins and horizontal ledges; these elements jointly operate as vehicles for mitigating heat gain. A primary curve is defined by a rounded glass canopy cantilevered over the porte cochere at the building’s base, carried from the ground by vertical fins, and culminates in a peaked roof that resolves the architecture with the sky — here, a public lounge and restaurant occupy the top floors.