Customers of Oregon Community Bank & Trust who patronize the bank's headquarters will be diverted to the other branch for the next few months.
The main location, 733 N. Main St., Oregon, will close Aug. 1 to get a makeover; a branch at 101 S. Alpine Parkway will serve as substitute until the project is completed in December.
Bank president and chief executive Steve Peotter would not disclose the price of the project but said it is a "significant investment" of more than $1 million.
The new look will add private offices for personal bankers, an expanded teller line, and a facelift of the building's exterior.
Oregon Community Bank & Trust, which opened in 1976, has 37 full-time and part-time employees and had $187.5 million in assets, as of June 30.
Another branch, at 978 Park st., closed on Dec. 31, 2013.