Real estate in Walnut Creek is as varied as anywhere. There are Walnut Creek condominiums, single family homes at all price points and large country estates. This charming city set In a sunny, upscale and comfortable environment, at the base of Mt. Diablo combines an eclectic collection of culture, award-winning shopping, hotels, sports facilities and cuisines – there really is something here for everybody.

from Wikipedia:

Walnut Creek is a city in Contra Costa County, California, United States, located in the East Bay region of the San Francisco Bay Area, about 16 miles (26 km) east of the city of Oakland. With a total estimated population of 70,166, Walnut Creek serves as a hub for its neighboring cities because of its location at the junction of the highways from Sacramento and San Jose (I-680) and San Francisco/Oakland (SR-24) and its accessibility by BART. Its active downtown neighborhood features hundred-year-old buildings and extensive high-end retail establishments, restaurants and entertainment venues.