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How They Pulled It Off: A Secret Stair Hatch That Seals Off the Living Space
This article explores a unique design solution implemented in a 1,737-square-foot residence located in Los Angeles's Montecito Heights neighborhood, designed by the architecture firm Claret-Cup for owner Shahan Sanossian. The homeowner presented architects Bojána Bányász and Donatella Cusmá with a comprehensive list of requirements, including a guest suite, reconfigurable living spaces, strong outdoor connection with privacy, and a midcentury-modern aesthetic without direct replication. A particularly innovative feature of the home is a custom folding stair hatch, which addresses the challenge of integrating a guest suite into the main home while maintaining privacy and flexibility.
Initially, city zoning laws necessitated an internal staircase connecting the guest suite to the main home. To enhance privacy, a door was installed at the bottom of the guest suite stairs. However, this created an aesthetically unappealing 'staircase to nowhere' from the main level. Inspired by commercial and industrial applications, the homeowner suggested a stair hatch concept, which the architects embraced and adapted for a residential setting. The resulting folding railing can be toggled between two positions: one allowing access to the downstairs guest suite, and the other expanding the living room by 40 square feet by creating a continuous floor surface.
The development of this stair hatch involved significant research, prototyping, and on-site collaboration with fabricators, as it blended aspects of furniture and structural elements. The hatch, constructed primarily from plywood with a steel frame for rigidity, features a gray linoleum cover that seamlessly integrates with the concrete floor when in the 'down' position. When in the 'up' position, it visually extends the railing and complements a nearby CMU ribbon wall. Crucially, the hatch was engineered to bear the same load as the surrounding concrete floor while remaining light enough for single-person operation, facilitated by a hinge mechanism and four hydraulic pistons. Within the staircase, a custom folded metal railing and dark blue painted wooden treads, complementing a geometric blue-and-white hallway design, add to the aesthetic appeal.
When the hatch is secured in the 'down' position, the living room's footprint expands from 200 to 240 square feet, providing additional space for entertaining, as demonstrated by the homeowner's ability to host large gatherings. In its 'up' position, it serves as a visual continuation of the railing, maintaining the home's primary daily configuration. This adaptable design reflects a growing demand for flexible living spaces that can evolve with changing needs and family dynamics, offering both practicality and a playful element. Beyond the stair hatch, the home incorporates other active features, such as folding glass doors that blur the lines between indoor and outdoor spaces, modular wooden boxes that function as steps or seating, and a reconfigurable kitchen island that expands to accommodate more guests. These elements collectively contribute to a dynamic and engaging living environment.
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