According to producer Joe d'Amato, the film was a commercial success mainly because of Achille Manzotti's idea to change the title from "Ghosthouse" to "La Casa 3". "La Casa 1" and "La Casa 2" being the Italian titles for Sam Raimi's Tanz der Teufel (1981) and Tanz der Teufel 2 - Jetzt wird noch mehr getanzt (1987).
Filmed at the same house location as Lucio Fulci's Lucio Fulci's: Das Haus an der Friedhofmauer (1981).
The shortwave radio Jim Dalen is using is a Yaesu FT- 726 R transceiver.
Made fun of by the MST3K original crew on RiffTrax.