Birmann 21, Commercial high-rise in Pinheiros, Brazil

Birmann 21 is a 155-metre corporate tower on Avenida das Nações Unidas, nº 7221, in Pinheiros, São Paulo, next to the Pinheiros intermodal terminal. The American firm Skidmore, Owings & Merrill designed it, and it is owned by PREVI, the pension fund of Banco do Brasil employees. It has 35,339 m² of leasable area and a 1,200-space garage.

Birmann 21 was completed in 1996 and designed by the American firm Skidmore, Owings & Merrill. From 1997 to 2013 it housed the headquarters of Editora Abril, which occupied all 25 floors before shrinking to 10 after restructuring. The publisher left in June 2018 for a smaller building in Morumbi. The tower is owned by PREVI, the pension fund of Banco do Brasil employees.

From 1997 to 2013, the building was home to Editora Abril, one of Brazil's largest publishers, whose staff referred to it internally as NEA. That period gave it a strong connection to the city's media world that locals still remember.

The building sits on a main road and has ample parking, making it easy to reach by car. Since it functions as a corporate office tower, visiting during business hours gives the best access to its common areas.

The rooftop helipad carries the ICAO code SDNN, measures 18 by 18 metres, has a square concrete landing area and sits 732 metres above sea level. A 186 m³ rainwater tank supplies exterior cleaning and irrigation. Since 2012 the tower has held LEED certification for existing buildings, covering energy efficiency, water use and waste recycling.