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Floating steel staircase divides Idunsgate Apartment by Haptic
The Idunsgate apartment, located in the top floor of a 19th-century apartment building in central Oslo, Norway, underwent a comprehensive refurbishment and loft conversion by London studio Haptic. The project unified the existing apartment with the newly acquired loft space above, creating a single, integrated living area. A key design element introduced to this transformed space is a suspended steel staircase, which serves both as a functional connector between the two levels and a subtle divider for the living spaces.
The original layout featured a confined and inefficient north-facing kitchen. Haptic strategically relocated the kitchen into the common areas, aiming to create a bright, airy, and spacious central hub for the apartment, fostering a social heart for residents. This new kitchen and dining area is distinguished by a dark grey finish, while the adjacent living area is painted white, featuring a low-slung sofa and a white mesh chair. An oak worktop in the kitchen functions as a breakfast bar, and a small fireplace is integrated into the worktop, enhancing the cooking space.
The custom-designed staircase is crafted from powder-coated white steel, appearing to float as it is suspended from a ceiling beam and an overhead wall. Its balustrade consists of narrow vertical supports, and open risers maintain an unobstructed view from below. A distinctive feature of the staircase is its termination before reaching the floor. Instead, residents step onto a piece of wooden furniture, which ingeniously serves a dual purpose as both a chest of drawers and a window seat, completing the transition from the stairs to the lower level.
The refurbishment also included a double-height bathroom adjacent to the living area. This bathroom is finished with polished concrete and grey stone, and its bath and shower areas are elevated, requiring a small staircase for access, adding to the apartment's unique spatial dynamics. Upstairs, the hallway connecting the master bedroom to the stairs doubles as a viewing platform, offering a perspective over the living space below. This upper level also provides access to a small, sheltered roof terrace, further extending the living space outdoors.
Throughout the design process, Haptic conducted a detailed three-dimensional survey of the apartment and carefully considered means of escape, allowing them to integrate every available space, including parts of the stairwell, into the design. The project successfully introduces spatial drama with significant vertical sight lines by skillfully utilizing level changes and existing opportunities. The master bedroom's en-suite bathroom, for instance, is organized across three levels by incorporating previously unused spaces. A large glass wall on a sunny terrace is designed to draw evening light deep into the apartment, enhancing its brightness and openness. Some loft space was intentionally sacrificed to create a double-height area above the living room, contributing to the overall sense of volume and grandeur. The choice of large-scale 100x300cm tiles in the bathroom creates an illusion of the space being carved from a single block of stone, emphasizing a cohesive and refined aesthetic. The kitchen fronts are painted to match the fireplace, ensuring a harmonious and integrated look within the newly designed social heart of the apartment.
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