The History and Creation of Piedmont CA
The area grew largely from wealthy San Franciscans fleeing the devastation after the Great Quake of 1907. Families relocated to the area seeking privacy, good weather and views of the greater San Francisco Bay.
Residents originally sought incorporation in 1907. Two elections were held among the citizens of Piedmont in 1907, both of which narrowly upheld the decision for Piedmont to become a separate city, rather than become a neighborhood within the city of Oakland.
By the Roaring Twenties, Piedmont was known as the “City of Millionaires” because it had the most resident millionaires per square mile of any city in the United States. Many of these millionaires built mansions that still stand, notably on Sea View Avenue and Sotelo Avenue/Glen Alpine Road in upper Piedmont. Piedmont became a charter city under the laws of the State of California on December 18, 1922. On February 27, 1923, voters adopted the charter, which can only be changed by another vote of the people.
Information courtesy of Wikipedia