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Hinoki Bath Tub and Biodiverse out-House in a Secluded Retreat

Authors:
Elliott Morgan, Zimin Lee
Hinoki Bath Tub and Biodiverse out-House in a Secluded Retreat
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A hinoki bath tub overlooks a landscape rich in biodiversity, while an integrated out-house provides essential functions, creating a secluded retreat focused on intimacy for couples.
5 key facts about this project
01
The cabin includes an out-house featuring a composting toilet and outdoor urinal.
02
A hinoki bath tub provides panoramic views of the surrounding landscape.
03
Sustainable timber cladding is designed in a randomized batten pattern.
04
The layout encourages both intimacy and individual privacy for occupants.
05
The site utilizes native flora to enhance ecological biodiversity.

The project aims to create a cabin designed for couples looking for a retreat focused on intimacy and solitude. Located in a quiet, natural setting, the cabin blends with its surroundings, using local flora to promote a sense of privacy and connection to nature. The overall design encourages shared experiences while allowing personal space, making it an ideal getaway for those wanting to escape daily life.

Conceptual Framework

At the center of the cabin's design is the idea of "them and theirs," which highlights the dual nature of relationships. The layout features an open-plan space that includes living, dining, and bathing areas, facilitating smooth movement between different functions. This arrangement encourages interaction and fosters deeper connections between occupants. Key elements, such as the master bed and bath tub, serve as focal points, offering views that immerse residents in the serene environment.

Out-House Design

An important feature of the design is the out-house, which serves multiple purposes, including a rainwater pump-house and additional bathing and sleeping space. This structure enhances the retreat experience by providing flexibility and options for privacy. The inclusion of an outdoor urinal and composting toilet encourages a direct connection with nature, making occupants feel more attuned to their surroundings. The out-house mirrors the primary structure's design, creating a cohesive look while offering a distinct experience.

Material Use and Facade

The cabin’s character is expressed through board and batten cladding, finished in four earthy timber stains. This choice supports the design's connection to the natural environment and creates a varied facade that resembles the vertical lines of surrounding trees. The random spacing of the battens contributes to an organic appearance, while the arrangement of windows ensures privacy while framing selective views.

Sensory Experience

The design includes several features that promote sensory engagement. The main shower functions as both a rain shower and steam room, surrounded by glass to provide uninterrupted views of the landscaped garden. A hinoki bath tub is positioned to offer a relaxing bathing experience with a scenic outlook, reinforcing the cabin's relationship to its environment.

The back patio is home to a variety of fragrant plants that enhance the setting, especially at night when the flowers release their scents. A small BioFuel ethanol fireplace contributes warmth and comfort, allowing for an experience with aromatic resins and oils. These thoughtful details invite occupants to fully experience the nuances of their natural surroundings.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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