Form: S-8

Initial registration statement for securities to be offered to employees pursuant to employee benefit plans

January 28, 2014

Documents

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated March 1, 2013 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in Quanta Services, Inc.‘s Annual Report on Form 10-K, as amended, for the year ended December 31, 2012.

/s/ PricewaterhouseCoopers LLP

Houston, Texas

January 28, 2014