EXHIBIT 23(a) CONSENT OF INDEPENDENT AUDITORS We consent to the use of our report dated January 27, 2004 included in the Annual Report on Form 10-K of Universal Forest Products, Inc. and subsidiaries for the year ended December 27, 2003, with respect to the consolidated financial statements, as amended, included in this Form 10-K/A. /s/ Ernst & Young LLP ERNST & YOUNG LLP Grand Rapids, Michigan July 23, 2004