The film was entirely shot in Los Angeles and its surroundings. The location was chosen for ease of filming. All actors, crew, and companies are based in the city, so using the location was economically advantageous. The plot requires a warm place with private houses, and the specific location of the action is completely unimportant, so the choice of city was obvious. 

Filming Locations:

Ben's House

In the Movie

Scene where Ben and his friends spend time discussing life and the future. Ben Stone (Seth Rogen) lives with his friends in this house in the Northridge area. Their home reflects the carefree lifestyle of young people obsessed with creating an entertainment website.

In Reality

The scene was filmed at A single-story house in the Northridge area, representing typical middle-class suburban housing in Los Angeles.