Paço d’Arcos Apartment by Site Specific Arquitectura: Coastal Living Reimagined

Located in the charming coastal parish of Paço d’Arcos in Oeiras, Portugal, the Paço d’Arcos Apartment by Site Specific Arquitectura exemplifies contemporary renovation that celebrates sea views and minimalistic design. Positioned at the mouth of the Tagus River, the apartment observes the river’s seamless connection to the Atlantic Ocean, a relationship that has defined the region’s history and identity.

Historical Context and Architectural Evolution

In the 19th century, Paço d’Arcos was a premier beach destination for Lisbon’s aristocracy, offering an idyllic seaside retreat. As the city evolved into a sprawling metropolis, the parish gradually suburbanized, retaining echoes of its coastal past. By the 1970s, this seaside character remained visible in typological references to summer homes lining the coast to Cascais. Modernist interventions in the historic center, including large south-facing housing units with ocean views, introduced a new urban typology: small T1 apartments of approximately 46 m², featuring compact compartments, kitchenettes, and expansive balconies.

Over time, temporary apartments became permanent residences. Subsequent additions, like glass and aluminum marquises, compromised both the building’s character and the neighborhood’s identity. Recognizing the need for spatial renewal, Site Specific Arquitectura, led by architect Leonardo Semedo, reimagined the apartment to enhance spatial continuity, maximize views, and optimize living areas.

A Contemporary Minimalist Approach

The renovation focused on creating a fluid, functional T1 layout that privileges social spaces and their connection to the sea. The existing marquise was demolished, and exterior openings were redefined with large glazed surfaces, merging interior and exterior spaces seamlessly. This intervention expands the outdoor terrace inward, offering panoramic views of the river and ocean.

Internally, the original apartment—comprising an entrance hall, bathroom, bedroom, and wardrobe—was completely restructured. Custom carpentry redefines each function within the home, using large wooden partition panels to create a flexible, open layout. Upon entering, residents are immediately greeted by expansive views of the sea, with a spacious living room serving as the central hub. The kitchen, positioned to the left, features a precise layout where each appliance has a designated place, balancing form and function. On the right, storage and equipment areas are neatly integrated, maintaining the apartment’s minimalist aesthetic.

Spatial Fluidity and Design Details

The bedroom, designed as an alcove, directly faces the ocean, offering privacy while maintaining proximity to the main living spaces. The bathroom and wardrobe are arranged efficiently, emphasizing utility without compromising comfort. The living room and balcony operate as a continuous space, adaptable for various activities and weather conditions. A unified cement floor finish extends both indoors and outdoors, reinforcing spatial continuity.

Large partition panels and exterior glazed surfaces allow temporary divisions, providing flexibility while preserving openness. From the terrace, residents enjoy 180º views of the sea and Tagus River, extending to Cabo Espichel on clear days. Sunshade screens mitigate direct sunlight, maintaining a comfortable interior environment while ensuring uninterrupted coastal views.

Materials and Atmosphere

The design employs natural materials, including wood and cement, to create a tactile, warm environment that complements the coastal surroundings. The minimalist approach emphasizes the apartment’s unique spatial qualities, ensuring that the sea remains the focal point of the home.

All photographs are works of  do mal o menos