Exhibit 24

                                  Power of Attorney

      Know all by these presents that the undersigned does hereby make,
constitute and appoint each of Jonathan M. Gottsegen and Patrick A. O'Reilly, or
any one of them, as a true and lawful attorney-in-fact and agent of the
undersigned, with full powers of substitution and revocation, for and in the
name, place and stead of the undersigned (in the undersigned's individual
capacity), to execute and deliver such forms that the undersigned may be
required to file with the U.S. Securities and Exchange Commission as a result of
the undersigned's ownership of or transactions in securities of BrightView
Holdings, Inc. (i) pursuant to Section 16(a) of the Securities Exchange Act of
1934, as amended, including without limitation, statements on Form 3, Form 4 and
Form 5 (including any amendments thereto), and (ii) in connection with any
applications for EDGAR access codes or any other documents necessary or
appropriate to obtain codes and passwords enabling the undersigned to make
electronic filings with the Securities and Exchange Commission. This Power of
Attorney shall remain in full force and effect until the undersigned is no
longer required to file Forms 3, 4 and 5 with regard to the undersigned's
ownership of or transactions in securities of BrightView Holdings, Inc., unless
earlier revoked in writing. The undersigned acknowledges that Jonathan M.
Gottsegen and Patrick A. O'Reilly are not assuming any of the undersigned's
responsibilities to comply with Section 16 of the Securities Exchange Act of
1934.

                             By:  /s/ Joshua T. Weisenbeck
                                  ------------------------------------------
                                  Joshua T. Weisenbeck

Date: April 26, 2018