When Madeleine sees the Bates house after dropping off the paint samples, she says it reminds her of "that Hopper painting." This is a reference to Edward Hopper's 1925 painting "The House by the Railroad," which was the inspiration for the look of the Bates house.
While Norman (Freddie Highmore) and Madeleine (Isabelle McNally) are talking, "Mother" appears in the upstairs window of the house, which is a reference to the scenes in Psycho (1998) where Detective Arbogast (Martin Balsam) believes he can see Norma's silhouette when he visits the property and Sam (John Gavin) and Lila (Vera Miles) also think they see her.
The hardware store that Madeleine (Isabelle McNally) owns was owned by Sam Loomis (John Gavin) in Psycho (1998).
At the start, a record is playing. It has the label 'Plainfield.' Plainfield, Wisconsin was the location of Ed Gein and his crimes on which Bloch based the novel, Psycho.
Sam (Austin Nichols) checks into the motel under a fake name, which Marion Crane (Janet Leigh) used when she checked in in Psycho (1998).