Exhibit 23.1 Consent of Independent Accountants We hereby consent to the incorporation by reference in the Prospectus constituting part of this Registration Statement on Form S-3 of our report dated February 6, 1995, which appears on page 20 of Barrett Business Services, Inc's Annual Report on Form 10-K for the year ended December 31, 1994. /s/Price Waterhouse LLP Price Waterhouse LLP Portland, Oregon September 26, 1995