SAN RAMON -- Masud Mehran, who co-developed with his son the iconic Bishop Ranch Business Park in San Ramon, died at his home in Atherton, with his family in attendance, after a brief illness. He was 93.

Born in Iran in 1920, Mehran attended Cornell University and Columbia University in New York City, and eventually traveled to each of the 48 mainland states before taking up residence in the Montclair district of Oakland.

Eager to contribute to the post-war boom in California, Mehran founded Sunset Development in 1951. The Sunset firm's largest initial project was Sunset Town, a Livermore community of 4,000 homes and 500 apartments along with offices and stores.

Masud Mehran, who co-developed with his son the iconic Bishop Ranch Business Park in San Ramon, died at his home in Atherton, Calif., with his family in
Masud Mehran, who co-developed with his son the iconic Bishop Ranch Business Park in San Ramon, died at his home in Atherton, Calif., with his family in attendance, after a brief illness. He was 93. (Sunset Development Co.)

In 1978, Mehran bought 585 acres in San Ramon's Bishop Ranch district and, with his son Alex Mehran, began development of the office park. Bishop Ranch has evolved into one of the nation's most successful business communities, consisting of 10 million square feet where an array of companies, including Chevron, AT&T, General Electric, Bank of the West and PG&E, employ 35,000 people.

Even in his later years, Masud Mehran visited the Sunset Development office and participated in the company's business, Alex Mehran recalled during an interview in 2011. Sunset Development is privately held and family owned and operated, and the realty firm remains the principal owner of the Bishop Ranch property.

Masud Mehran was active in the community. His affiliations included board of directors posts for Children's Hospital, the Boy Scouts of America, Golden Gate University, a member of the advisory board for Fisher Center for Real Estate at UC Berkeley, and he was a past president of the Associated Builders of the Bay Area.

Contact George Avalos at 408-859-5167. twitter.com/georgeavalos