Bel Air is a residential neighborhood in the hillside foothills of the Santa Monica Mountains on the Westside of Los Angeles, about twelve miles west of downtown and directly across Sunset Boulevard from the UCLA campus. It is not a separate city but one of the best-known communities within Los Angeles, developed beginning in the early 1920s when oilman Alphonzo Bell subdivided the land into the estate lots that still define it. The neighborhood's character is established by its scale and its setting. Roughly 8,000 residents live across more than six square miles, giving Bel Air one of the lowest population densities in the city. Homes sit on large, landscaped lots, often behind gates, walls, and long driveways, along narrow winding roads that climb the hillsides. SurveyLA, the city's historic resources survey, identifies steep hillsides, private streets, gated communities, and houses set far back on large lots as defining characteristics of the area. Architecturally, the neighborhood spans classic period-revival styles — Neoclassical, Colonial Revival, Regency Revival — alongside mid-century and contemporary estates. Two institutions anchor Bel Air's identity: the Bel-Air Country Club, with its golf course in the neighborhood's heart, and the Hotel Bel-Air, a long-standing luxury hotel set amid gardens. The community is entered through gates along Sunset Boulevard, principally the East Gate at Beverly Glen and Sunset and the West Gate at Bellagio Way, opposite UCLA. Bel Air's appeal is quiet, private, car-oriented living with uncommon access. UCLA, Westwood Village, Beverly Hills, and Brentwood — including the Getty Center — lie just beyond its gates, and the 405 freeway puts the wider Westside and the San Fernando Valley within reach. It suits those seeking estate-scale homes and seclusion without sacrificing proximity to the institutions and amenities of the Westside.