- Artist Disillusionment: Apparently it had enough for one of the screenwriters, Dan Harmon, to write an apology letter, citing that Executive Meddling had made the movie scarier than intended. The letter also took the opportunity to call Spielberg and company morons regarding decisions made that Harmon was clearly unhappy with.
- Creator Backlash: Dan Harmon admitted that he was dissatisfied with the film's final result.
- Defictionalization: The game depicted inside the movie (Thou Art Dead) exists and is entirely playable, though it's not an arcade game; It was playable on Sony Picture's website and is playable in the game based on the movie.
- Executive Meddling: Per word of Dan Harmon, producer Steven Spielberg and director Gil Kenan made the final product scarier in tone than he had wanted and forced in the scene expanding on Constance's origin and death against his wishes. Considering the film is in fact called Monster House and the backstory is actually very important to the plot, fans of the film would see their influence as a good thing. Ironically, this was in addition to executive decisions made to make the film less disturbing, such as having all of the house's victims show up alive and well during the credits and rejecting Harmon's original idea to have the house be full of human organs.
- Missing Trailer Scene: The scene where the house eats the police car whole with its tongue shown in the trailers is never seen in the final film.
- One-Scene Wonder: Jon Heder as Reginald "Skull" Skulinski. He's in the film for less than five minutes, in the scene at the diner where he's playing the "Thou Art Dead" arcade game and DJ, Chowder, and Jenny ask him for advice about the possessed house.
- Real-Life Relative: In the Latin-American Spanish dub, DJ and Charlie are played by real-life brothers Alejandro and Luis Fernando Orozco.
- What Could Have Been:
- One piece of concept art◊ has Zee standing outside the police car while the kids are in the backseat, with the tree starting to pick her up to suck her inside the house. This was ultimately dropped from the film.
- Another piece of concept art◊ implied that originally Officer Lister was supposed to be the Straight Man cop while Officer Landers was the rookie. In the final film their dynamic is switched.
- In Dan Harmon's original draft of the film, the house was full of human organs.
Trivia / Monster House