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's characters 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.

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

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).

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).

This was the last Morgan Creek production to be released by 20th Century Fox (now 20th Century Studios), before Warner Bros took over as their distributor.

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 during the 1940s.

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 before this film. Keaton worked with Baldwin on Beetlejuice (1988); Griffith worked with Baldwin on Working Girl (1988); and Modine worked with him on Married to the Mob (1988).

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

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

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

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.

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

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 amount for which Drake Goodman (Matthew Modine) and Patty Palmer (Melanie Griffith) buy the house is $749,000.

The cast includes four acting Oscar nominees: Melanie Griffith, Michael Keaton, Mako and Laurie Metcalf.

Christopher Reeve unsuccessfully lobbied John Schlesinger personally for the "Carter Hayes" role.

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.

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

The second movie starring Michael Keaton which has a model of a town in it (the first one was Beetlejuice (1988)).

Tippi Hedren (Florence Peters) and Melanie Griffith (Patty Palmer) are mother/daughter in real life.

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.

During a talk at the New York Film Academy, Matthew Modine said he did not like working with Melanie Griffith on this film, and that he mostly remembers her complaining about having her period.

Michael Keaton and Tracey Walter were both in Batman (1989).

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).

Dorian Harewood worked for director John Schlesinger in The Falcon and the Snowman (1985).

John Schlesinger: as the man entering the Marriott Hotel elevator with Patty.

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

Matthew Modine starred in Married to the Mob (1988) with O-Lan Jones, who plays the maid who lets Patty into Hayes' hotel room.