The house that the film's plot supposedly occurred in still stands in Amityville, Long Island. While it remains a popular walk-by spot, especially on Halloween, the iconic wedge windows have been replaced and the paint is different, to make it look less like the popular image of the house.
The house used for the first three movies in Toms River, New Jersey was extensively remodeled for filming (the wedge windows and the gambrel roof were part of a facade), and looks nothing like the iconic image of it in real life. Even so, the house has been repositioned on the property as to not make it visible from the street.
Christine Belford, who played Regina Cunningham in the film adaptation of Christine, lived in the house at 112 Ocean Avenue from 1960-1965. Her parents sold the home to the DeFeos.