1 EXHIBIT 23.1 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated March 17, 1999, with respect to the financial statements of Modtech, Inc. included in the Annual Report of Modtech Holdings, Inc. on Form 10-K for the year ended December 31, 1998. /s/ KPMG LLP -------------------------------------- KPMG LLP Costa Mesa, California May 20, 1999