The Tetrastyle Atrium was part of the more private area of the house and was directly connected to the service corridor and the other rooms off the corridor. It was possible to conceal this atrium from the Tuscan Atrium and more public parts of the house. This had its own street entrance and corridor added, possibly in the late 1st century BC. This atrium was supported by 4 columns, which gave it its name. This room also supports the theory that the house was created in the Samnite period, around the 2nd century BC.  

There is evidence that the Tertrastyle Atrium was rebuilt after the earthquake in 62 BC. Modernly, much of the atrium was destroyed, as were other parts of the House of the Faun and Pompeii, as a result of Allied bombing in the 1940s.