The Zone of Interest is partially based on true events. While adapted from the book of the same name by Martin Amis, the film follows the real-life Rudolf Höss and his wife Hedwig instead of the fictionalized version the book uses.
Interestingly, the Höss house in the film is an accurate recreation of their home. The filmmakers also relied on first-hand testimonies from victims and survivors to portray as accurate a picture of the Höss family as possible.