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                                                                    EXHIBIT 23.7


                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

         As independent public accountants, we hereby consent to the use of our
report dated July 30, 1999, on the financial statements of Crown Fiber
Communications, Inc. as of and for the year ended December 31, 1998 included in
this Form 8-K of Quanta Services, Inc. It should be noted that we have not
audited any financial statements of Crown Fiber Communications, Inc. subsequent
to December 31, 1998 or performed any audit procedures subsequent to the date of
our report.

BABUSH, NEIMAN, KORNMAN & JOHNSON, LLP

Atlanta, Georgia
November 12, 1999