Picket Post Close was the real-life location for the filming of 4 Privet Drive in the first Harry Potter film. 12 Picket Post Close is the house number of the residents Warner Brothers used for filming the Dursleys' house.
Warner Brothers had to pay the residents of Picket Post Close a fee for using their neighbourhood in the film, as well as for the inconvenience of all the filming equipment. When it came time to shoot the second film, the residents of Picket Post Close demanded too much money, and Leavesden Studios built an actual Privet Drive set. Picket Post Close was used in the first and fifth films.