Exhibit 23.2

CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in Registration Statement Nos. 333-186988, and 333-183172 on Form S-3, 333-136911 on Form S-4, and 333-195989, 333-168540, 333-150312, 333-150311, 333-71990, 333-71992, and 333-127889 on Form S-8 of Integrys Energy Group, Inc. and subsidiaries of our report dated February 2, 2015, relating to the financial statements of American Transmission Company LLC, appearing in this Annual Report on Form 10-K of Integrys Energy Group, Inc. and subsidiaries for the year ended December 31, 2014.

/s/ Deloitte & Touche LLP

Milwaukee, Wisconsin

February 27, 2015