Casa Colectiva América, Rationalist residential building in San Telmo, Buenos Aires, Argentina.

Casa Colectiva América is a rationalist residential building with clean lines and unembellished surfaces that create a balanced composition of geometric forms and functional spaces. The structure is divided into apartments and features shared common areas that connect residents together.

The Casa Colectiva América was the third building erected by the Comisión Nacional de Casas Baratas and was completed in 1937, after the Bernardino Rivadavia (1921). A 1929 competition won by Manuel Levingston and Alberto Rodríguez Ercheto, with four pavilions around three courtyards, was never built; the finished work is attributed by some sources to Estanislao Pirovano.

The three independent entrances serve 97 apartments, and the U-shaped layout leaves a shared access courtyard with public benches and children's play equipment. It was the first CNCB building with elevators, a change in how the commission housed working families.

The building occupies nearly a quarter of a block in San Telmo, with its main access patio on Balcarce street and a taller side facing Avenida Paseo Colón, where the slope adds a fourth floor. The three blocks have separate entrances, so walk the perimeter to see both street frontages and the benches and children's play equipment in the entrance courtyard.

The building's attribution to Estanislao Pirovano is not certain: some sources credit him, while the 1929 competition was won by Manuel Levingston and Alberto Rodríguez Ercheto with a four-pavilion scheme that was never built. The finished 1937 block instead forms a U around an entrance courtyard with public benches and children's play equipment.