The banking offices are located at Covina, La Verne, and San Dimas in the San Gabriel Valley in Los Angeles County, and Pleasant Hill in Contra Costa County, California.
Based on the agreement, the acquirer will also assume substantially all of the deposits of the four locations, which total up to $138.3m as of 31 March 2013.
Pending receipt of concerned regulatory approvals and other customary closing conditions, the transaction is likely to conclude before the end of the third quarter of this year.
Opus Bank chairman, chief executive officer and president Stephen H Gordon said that the acquisition of these banking offices and related deposits offer an opportunity to expand into markets and is ideal for future growth.
CB&T CEO and president David Blackford said, "The cost savings generated from the sale provide an opportunity to expand into new markets as we continue to build the bank and deliver our high touch style of banking throughout California."
Both banks have agreed to cooperate to ensure a smooth transition for the businesses and individuals, while CB&T client accounts will remain unchanged.
As of 31 March 2013, Opus Bank had $3bn in total assets, $2.3bn in total loans, and $2.1bn in total deposits. It offers relationship-based banking products, services, and solutions to its clients including small and mid-sized commercial businesses, professionals, and consumers.
