Screenwriter Daniel Pyne once rented an apartment to a tenant that he could not evict. The film was inspired from this scenario.

In the original script, Carter (Michael Keaton) was a bisexual man who sexually threatens Drake (Matthew Modine) and Patty (Melanie Griffith).

The home of Melanie Griffith and Matthew Modine is not in Pacific Heights at all, but right across town in San Francisco's Potrero Hill district at the corner of Texas Street and 19th Street.

Melanie Griffith didn't like the experience of filming this movie, and made some complaints about it while she was filming The Bonfire of the Vanities (1990), which started filming a few days after this film had been completed.

This is ranked at the No. #93 rank on Bravo's "The 100 Scariest Movie Moments" list.

One of a cycle of thrillers made during the early 1990s which were set around husband and wife characters. The films include: Malice (1993), Deceived (1991), Shattered (1991), Mortal Thoughts (1991), Consenting Adults (1992), Unlawful Entry (1992), Presumed Innocent (1990), Guilty as Sin (1993), Sleeping with the Enemy (1991), and A Kiss Before Dying (1991).

Carter Hayes calls Patty, "Miss Palmer". Also, the detective called her "Miss Palmer", but the credits call her name is "Patty Parker".

Film critic, Janet Maslin in The New York Times wrote, that this film was "perhaps the first eviction thriller".

Matthew Modine and Dorian Harewood previously worked together in Stanley Kubrick's Full Metal Jacket(1987).

Tippi Hedren cameos without dialogue as a wealthy older woman romanced by Michael Keaton. This makes a six degrees of separation circle: in Batman (1989), Keaton played the love interest of Kim Basinger; in Never Say Never Again (1983), Basinger played the love interest of Sir Sean Connery; and in Marnie (1964), Connery played the love interest of Hedren. Much more recently, in Fifty Shades Darker (2017), Basinger played an ex-lover of Jamie Dornan, Dakota Johnson's love interest in the same film. Johnson is the daughter of Melanie Griffith and granddaughter of Hedren.

The film's top-billed three leads, Michael Keaton, Melanie Griffith, and Matthew Modine, all each worked with Alec Baldwin in a movie in the preceding couple of years or so before this film. Keaton worked with Baldwin on Beetlejuice (1988); Griffith worked with Baldwin on Working Girl (1988); and Modine worked with Baldwin on Married to the Mob (1988).

Debut produced screenplay for a cinema movie of television writer Daniel Pyne.

The year that the nineteenth century polychrome house in this movie was built, was either 1883 or 1886 (the film states both dates) with slight modifications on the old house being re-modeled during the 1940s.

Michael Keaton and Matthew Modine have appeared separately in Batman and The Dark Knight movies: Keaton as the title character in Batman (1989) and Batman Returns (1992), and Modine as a cop in The Dark Knight Rises (2012).

The movie was notable for having story element similarities with two Roman Polanski thrillers: The Tenant (1975) and Rosemary's Baby (1968).

The movie was filmed between late January and early May of 1990.

The third of three movies released in consecutive years where Michael Keaton played a psychologically disturbed character. The first was The Dream Team (1989), in which Keaton played an escaped patient from a psychiatric institution. The second was Batman (1989) in which a young Bruce Wayne suffers an mental breakdown when his parents are murdered.

The second movie, starring Michael Keaton, which has a model of a Town in it. The first one being "Beetlejuice."

Star Billing: Melanie Griffith (first), Matthew Modine (second) and Michael Keaton (third).

Carter Hayes/James Danforth's car is a 1977 Porsche 911.

The amount, for which Drake Goodman (Matthew Modine) and Patty Palmer (Melanie Griffith) bought the house, was seven hundred forty-nine thousand dollars.

The picture was a rare entry into the horror-thriller genre of director John Schlesinger whose only other films in these genres were The Believers (1987) and for television The Tale of Sweeney Todd (1997). This movie also can be categorized as a suspense-thriller with Schlesinger also directing Marathon Man (1976) and Eye for an Eye (1996) in this genre.

The name of the housing development where the film opens was a part of Sun Hills Estates at Palm Desert. Its address in the movie is 170 Pacific Street.

The movie's main cast, Melanie Griffith, Matthew Modine, and Michael Keaton all have first names beginning with the letter "M".

One of two 1990 movies starring Melanie Griffith, the other being The Bonfire of the Vanities (1990).

One of two 1990 films starring Matthew Modine. The other being Memphis Belle (1990).

John Schlesinger: Uncredited, as a man in a hotel elevator.

The music video on the television when Hayes attacks Drake near the end of the film is "Hands All Over" by Soundgarden.

Matthew Modine was also starred in Married to the Mob with O-lan Jones who played maid that lets Melanie Griffith pretending to be Carter/Drake into his hotel room.