As part of its plan to expand in the Pacific Northwest, Los Angeles-based Buchalter announced Monday that it will merge with Portland-based Ater Wynne, adding 22 attorneys.

The merger is set to take effect Oct. 1. The addition of the group will bring Buchalter to approximately 300 attorneys across its nine office locations, which also include Los Angeles, Napa Valley, Orange County, Sacramento, San Diego, San Francisco, Scottsdale and Seattle.