Umpqua Bank in Portland, Ore., hopes to attract affluent customers to the north and south.

The $11.5 billion-asset subsidiary of Umpqua Holdings Corporation (UMPQ) said Thursday that its private banking arm will expand service to Seattle and San Francisco.

The unit, which ties together banking and brokerage, offers clients who have at least $3 million in net worth and $1 million to invest such services as trust administration, retirement planning and investment guidance.

"Seattle and San Francisco are a great fit for Umpqua's unique approach to banking, and we look forward to adding our private-banking expertise in these key markets," Kelly Johnson, Umpqua's head of wealth management, said in a news release.

Umpqua, which has expanded throughout California over the past year, has 184 locations in four Western states.

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