The first part of the plot is identical to the story of Come September (1961) (Dir: Robert Mulligan), where the caretaker turns the bungalow into a resort.
Narendra Bedi wrote the story of Mere Sanam, at that time he was an assistant director. Later he became director and made many films like Bandhan, Rafoo Chaker, Adalaat, Be Naam, Sanam Teri Kasam Taqaat etc.
Shammi Kapoor was to do the hero role which Biswajeet did, Shammi Kapoor couldnt do due to date problems, then he did Brahamachari & Andaz for same producer. In Mere Sanam, Mumtaz was appreciated and start to get major and heroines roles. Narendra Bedi and Ramesh Sippy, were asistant directors in this film. Then later they became major directors.
Hollywood movie Come September was remade as Kashmir Ki Kali,Mere Sanam and Ek Baar Kaho.
"Haaji Haaji Baba" was sampled by Shamik for his album Chanelling India Volume 2.