EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Modtech Holdings, Inc.:

We consent to the use of our report dated June 16, 2005, with respect to the consolidated statements of operations, shareholders’ equity and cash flows of Modtech Holdings, Inc. for the year ended December 31, 2004, and the related financial statement schedule II for the year ended December 31, 2004, incorporated herein by reference.

/s/ KPMG LLP

Costa Mesa, California

October 3, 2007