Holmby Hills is a neighborhood on the Westside of Los Angeles, California, United States. The neighborhood was developed in the early 20th century by the Janss Investment Company, which developed the rest of Westwood, Los Angeles as well as other "LA" neighborhoods. With the expansion of Sunset Boulevard, Holmby Hills was split into northern …Holmby Hills is a neighborhood on the Westside of Los Angeles, California, United States. The neighborhood was developed in the early 20th century by the Janss Investment Company, which developed the rest of Westwood, Los Angeles as well as other "LA" neighborhoods. With the expansion of Sunset Boulevard, Holmby Hills was split into northern and southern sections, each lying within a different community plan area designated by the City of Los Angeles: The portion south of Sunset Boulevard extends south to Club View Dr and east to Beverly Glen Boulevard and west of the Los Angeles Country Club; it is located within the Westwood Community Plan Area, but certain characteristics such as the absence of sidewalks and the presence of historic street lamps that are unique to Holmby Hills help to distinguish it from the remainder of Westwood. The portion north of Sunset is the area east of Beverly Glen Boulevard and west of the city limits of Beverly Hills, with Greendale Drive and Brooklawn Drive as its northernmost streets; it is located within the Bel Air–Beverly Crest Community Plan Area, though it is historically distinct from the neighborhoods of both Bel Air and Beverly Crest, as it was developed concurrently with Westwood.