Mezzanina Cabin by Arce&Westermeier: A Raised Sanctuary in the Valdivian Rainforest

A Compact Architectural Retreat in Valdivia, Chile

Nestled deep within the lush, evergreen canopy of the Valdivian Rainforest in northern Valdivia, Los Rios Region, Mezzanina Cabin by Chilean architecture studio Arce&Westermeier is a modest yet striking architectural intervention. Conceived as a compact cabin retreat adjacent to a primary residence, the project reflects a sensitive response to its unique rainforest microclimate, sloping topography, and the desire for both intimacy and openness.

Elevated Design in Response to Nature

Occupying just 45 square meters, the cabin’s small footprint is elevated on slender piles, a design decision that not only addresses the slope of the terrain but also offers sweeping panoramic views of the surrounding landscape, particularly towards the west where the Calle-Calle River gently winds through the forest.

This elevated architectural solution allows the cabin to feel weightless among the trees, minimizing its impact on the natural environment while maximizing visual immersion. The design articulates a harmonious tension between the built form and its untamed context, accomplished most powerfully through a nearly six-meter-long glazed curtain wall that opens the interior to the wild forest outside.

A Dialogue Between Transparency and Solidity

Externally, the cabin’s form is defined by solid, monolithic facades clad in dark, uniform materials, punctuated by only a few necessary openings in areas such as the kitchen and bathroom. This approach ensures thermal efficiency and privacy, while the single-pitch roof enhances rainwater runoff, critical in Valdivia’s heavy precipitation climate.

The eastern elevation reaches a height of five meters, introducing a sense of verticality that supports the project's most defining interior feature—its mezzanine level. This elevated nook, which gives the cabin its name, plays a pivotal role in the programmatic flexibility of the space.

The Mezzanine: Flexibility Within a Minimal Footprint

Designed to support a hybrid domestic lifestyle, the mezzanine level is not merely an architectural gesture but a strategic solution. It answers the challenge of accommodating semi-private or intermittent users—a rare feature in such compact cabin typologies. The space can transform into a guest sleeping area, reading loft, storage zone, or even a small lounge, thanks to its 1.4-meter sloped ceiling and open-ended usability.

Accessed by a cat ladder staircase located within the entry vestibule, the mezzanine floats above a programmatic core—a condensed arrangement of essential services, including the bathroom, walk-in closet, entrance, and kitchen appliances. This compact nucleus frees the remainder of the floor plan for a seamless, open-plan living area that visually and spatially extends towards the expansive forest view.

A Gradient of Privacy and Openness

The architectural organization results in two distinct yet interconnected living zones: a grounded, open-plan area and a raised, semi-private mezzanine. This split-level spatial hierarchy forms a graduated privacy gradient, enhancing the cabin’s functionality without compromising its compactness. The design ultimately achieves a rare architectural balance—a small footprint with expansive experiential depth.

All Photographs are works of Nicolas Saieh, Felipe Westermeier