SA House by 73.Onze Arquitetura: A Contemporary Tropical Modern House Design in Trancoso, Brazil

Located in the lush coastal region of Trancoso, in southern Bahia, Brazil, SA House by 73.Onze Arquitetura redefines tropical modern house design by harmoniously integrating architecture with its surrounding native landscape. Designed with both family living and social gatherings in mind, the 1094 m² residence delivers a sophisticated balance of privacy, climate-conscious strategies, and indoor-outdoor fluidity.

A Residence Rooted in Site and Climate

Set within a residential condominium bordered by rubber and ingá trees, the house embraces the flat topography and the green permanence of its surroundings. The architectural program was deeply influenced by the local conditions—sunlight, natural ventilation, and existing vegetation—which helped shape the overall distribution of spaces. This thoughtful orientation enables the home to remain cool and bright throughout the year, a key principle in effective tropical modern house design.

Spatial Organization for Climate and Comfort

The spatial strategy of SA House ensures maximum comfort and seamless flow. Private bedrooms are organized in two distinct volumes. One single-story lateral block respects and preserves the native trees on-site, promoting permeability between the built space and the surrounding garden. A flat roof slab tops this volume, offering both functional and aesthetic value.

Each room in this block features an individual east-facing balcony, maximizing morning sunlight and promoting thermal comfort. Vertical wooden brises serve as screens for privacy and sun control, creating dynamic patterns of light and shade that change with the day.

The other set of bedrooms is located on the upper level of the main house volume, with a continuous balcony that opens onto the pool and the green corridor at the back of the lot. Brise-soleils also appear here, providing continuity in material language and performance.

Architectural Contrast and Thermal Strategy

The house’s architectural identity lies in its contrast of materials and volumes. The main volume features a traditional tiled roof, while the lateral block presents a flat slab roof constructed with expanded clay. This not only ensures insulation and comfort but also serves as a base for technical installations, like air conditioning condensers, thus maintaining visual cleanliness.

Indoor-Outdoor Integration Through Design

The social heart of the house is found on the ground floor of the two-story volume. This space is characterized by large retractable glass panels that dissolve the boundaries between interior and exterior, connecting the living and dining areas with the gourmet balcony and swimming pool.

A central wooden deck links the two architectural volumes and acts as a guiding axis, subtly directing movement through the site. It also encourages moments of pause and contemplation, reinforcing a sensory connection with the tropical setting.

Craft Meets Contemporary in Interior Design

The interiors, also designed by 73.Onze Arquitetura, reflect a blend of contemporary aesthetics with local craftsmanship. Clean, minimalist lines are complemented by furniture and décor sourced from regional artisans. A neutral color base, accentuated by earthy reds and warm tones, enhances the welcoming ambiance. Burnished cement floors and wooden finishes evoke a tactile richness that resonates with the exterior materiality.

A Modern Tropical Retreat

SA House stands as a refined example of tropical modern house design that celebrates climate-responsive living and architectural elegance. Its careful composition of space, materiality, and landscape reflects a deep understanding of site, culture, and user needs. Designed to host, comfort, and inspire, this residence successfully balances openness and intimacy, sophistication and warmth—offering a timeless retreat in the tropics.

All Photographs are works of Oka fotografia