Ellen O'Donnell's house is where both Ellens reside in Bremin. Ellen's parents probably live here too, as well as Ellen's dog Wikileaks. It is neighboured by Felix's house.
- The O'Donnell keep a spare key under the front plot plant in the Real World, which is the key that Ellen uses to get inside.
- According to the novel, this house is said to be on Elm Grove.