Plasco Building, Office skyscraper in District 12, Tehran, Iran

The Plasco Building is a 20-story high-rise at Istanbul Crossroads in Tehran, with 5 floors below and 15 above ground. Its main facade is a pale, weathered grey-beige grid of repeating rectangular windows across many storeys; a narrower right-hand facade shows a vertical strip of darker cladding. Lower attached structures with horizontal bands of brownish-orange siding and glass sit at the base, and a thin white antenna rises from the flat roof.

Habib Elghanian built the first Plasco between 1960 and 1962, and it opened in 1962 as Iran's tallest building at 42 metres, a title it lost in 1963 to the 68-metre Tehran Stock Exchange. After the 1979 revolution his assets passed to the Mostazafan Foundation. The building burned and collapsed on 19 January 2017; the replacement by KRDS opened in 2021 as Plasco 1400.

The name comes from the Plasco plastics company of Habib Elghanian, head of Tehran's Jewish Association, who built the tower. In the 1960s it was called a symbol of capitalism, and after 1979 it became a clothing production and wholesale hub. Its exterior facade later became a subject of public jokes.

The rebuilt structure stands at the same location and houses business spaces and retail in central Tehran. Public areas are accessible to visitors during standard office hours.

The new tower, opened in 2021 as Plasco 1400, was designed by the Iranian firm KRDS (Kourosh Rafiey Design Studio). Its facade drew criticism and became a joke among Tehran residents. The original building had no gas piping, so shopkeepers heated their units with electric or gas heaters.