The Flats Of Beverly Hills is roughly defined by Sunset Boulevard on the north, Doheny Boulevard on the east by West Hollywood, Whittier on the west, bordering on Holmby Hills and Santa Monica Boulevard on the south. The term "The Flats" comes from the fact that, unlike neighborhoods such as Trousdale Estates, Holmby Hills and Beverly Hills Post Office, the real estate and surroundings are much more physically flat. The blocks were designed by landscape architect William D. Cook, with large lots and wide curving streets lined with palm, eucalyptus and acacia trees and a three block 80 foot wide park running along Santa Monica Boulevard, parallel to the Los Angeles Country Club.
The parkway trees that line the streets of Beverly Hills, as well as the trees in the parks of the City, comprise the City's urban forest. From its inception, the management of the City of Beverly Hills urban forest has been a master planned effort. The Green and Cook Community Plan of 1906 is credited with the original planting of trees along the streets of the City. The idea of this plan was to uniformly plant a species of tree along a street, and to vary the species of tree along the different streets of the City. Some of the original street tree plantings did not adapt well to the area. Other trees began to crowd each other as they matured. While the loss of mature trees is a somber event, removal and replacement of declining trees plays an important role in the long-term sustainability of Beverly Hills urban forest.
The lot sizes in the Flats increase toward the north and center of the community. Each north and south street spans three to four blocks, numbered 500 through 800. Lots in the 500 block range from 7,000 square feet up to 1/2 an acre. Lots in the 600 block range from 10,000 square feet up to 4/5 of an acre. Lots in the 700 block range from 12,000 square feet up to 1 acre. Lots in the 800 block range from 15,000 square feet up to 1 acre.