Plaza House by Grimaldi - Nacht Arquitectos: A Modern Mountain Retreat Rooted in Nature and Incan Heritage

Nestled on the southern slope of Lake Gutiérrez in San Carlos de Bariloche, Argentina, Plaza House by Grimaldi - Nacht arquitectos is a remarkable architectural response to both landscape and heritage. Situated 200 meters above sea level within a 10,000 m² Coihues forest, the residence gracefully integrates into its environment through a thoughtful composition of four staggered volumes connected by a central plaza.

Incan Inspiration and Architectural Strategy

The conceptual foundation of Plaza House is inspired by the urban structure of ancient Incan cities, where tiered platforms and interconnected spaces organized daily life. Here, the design articulates separate functions—private, communal, and recreational—through modular volumes cascading down the steep terrain. These volumes are unified by a central plaza that acts as both a contemplative refuge and a vibrant social hub.

Site-Responsive Design and Environmental Sensitivity

Built within a protected native forest, the project team faced strict regulations that informed every design decision. To preserve existing vegetation, the house is elevated on piles, allowing the natural slope and groundwater flow to remain undisturbed. The access route follows an old cattle road, minimizing new environmental impact.

Spatial Program and Seasonal Flexibility

The architectural program was developed with seasonal adaptability in mind. Interior and exterior spaces are designed for flexible recreational use, catering to the diverse activities of a mountain retreat throughout the year. Each of the four volumes offers a distinct spatial atmosphere. A guest pavilion, main residence, and entertainment block are connected by a bridge and open-air paths, supporting both privacy and communal gathering.

The public zone—anchored by a stone-clad game room with cinema, grill, and kitchen—opens directly onto the main plaza. This square is framed by a custom lapacho wood bench and equipped with a fire pit and dining table, extending the living space outward with panoramic views of the lake.

Materials, Structure, and Sustainability

Materiality plays a central role in rooting the architecture to the landscape. Each volume features a palette of burnt Pacara wood cladding, black sheet metal roofing, reinforced concrete slabs, and natural stone masonry. Interiors are richly detailed with Bolivian Lapacho and Petiribi wood, enhancing warmth and cohesion across the spaces.

The materials were ethically sourced from sustainably managed native forests, underscoring the project's environmental responsibility. The use of stone and wood in varying combinations gives each block a unique identity while maintaining a harmonious dialogue with the surrounding forest.

All Photographs are works of Javier Agustin Rojas