Located along the Caribbean coast of Costa Rica, the Araña Alegre House is a low-footprint residence designed by Luz de Piedra Arquitectos to balance comfort, climate responsiveness, and environmental responsibility. The construction system is based on a prefabricated laminated teak structure, selected for its local availability, durability in tropical climates, and reduced embodied carbon compared to conventional concrete or steel construction.
Structure and material strategy
The modular teak structure allows for rapid on-site assembly, reducing construction time and environmental disturbance. Prefabrication ensured minimal material waste and greater precision. The elevated floor system raises circulation paths above ground level, preserving natural topography and allowing air movement beneath the building. This passive measure helps regulate temperature and humidity.
Finishes are selected for longevity and local sourcing. Porcelain and natural stone flooring provide durable surfaces suited to the humid environment. Stainless steel fittings, fine-grade mesh screens, and ceiling fans support natural ventilation and comfort throughout the interior. Light-coloured finishes and shaded openings maximise brightness while reducing solar heat gain.
Passive Environmental Design
The design eliminates the need for mechanical air conditioning through passive cooling strategies. Large openings, roof overhangs, and a continuous terrace create shaded transitional spaces that promote cross-ventilation. The building’s orientation and roof geometry respond to prevailing breezes, channelling airflow through the living areas. Wide eaves protect against tropical rainfall and sun exposure, maintaining interior comfort in all seasons.
The central terrace functions as an outdoor living space, blurring the boundary between interior and forest. Open-plan living areas extend into the landscape, reinforcing connection with the surrounding vegetation.
Water and Landscape Integration
The chlorine-free swimming pool uses a natural filtration system based on saltwater and mineral balancing, reducing chemical use. Rainwater harvesting supports garden irrigation, and permeable surfaces minimise runoff while allowing groundwater recharge. Native vegetation is preserved around the site, maintaining biodiversity and visual privacy.
