Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in this Amendment No. 1 to the Registration Statement on Form S-4 of Integrated Electrical Services, Inc. (File No. 333-188182) and the related Prospectus and to the use and incorporation by reference therein of our report dated December 14, 2012, with respect to the consolidated financial statements of Integrated Electrical Services, Inc. included therein and in its Annual Report (Form 10-K) for the year ended September 30, 2012, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Houston, TX

June 11, 2013