POWER OF ATTORNEY

     KNOW ALL BY THESE PRESENTS, THAT I, Elizabeth Timm, do hereby appoint Scott
R. Mahoney, Elizabeth Riotte and Susan Johnston, or either of them, my true and
lawful attorney-in-fact to:

(1) prepare, execute in my name and on my behalf, and submit to the U.S.
    Securities and Exchange Commission (the "SEC") a Form ID, including
    amendments thereto, and any other documents necessary or appropriate to
    obtain codes and passwords enabling me to make electronic filings with the
    SEC of reports required by Section 16(a) of the Securities Exchange Act of
    1934 or any rule or regulation of the SEC;
(2) execute for me and on my behalf, in my capacity as an officer and/or
    director of Avangrid, Inc. (the "Company"), Forms 3, 4, and 5 in accordance
    with Section 16(a) of the Securities Exchange Act of 1934, as amended, and
    the rules thereunder;
(3) do and perform any and all acts for me and on my behalf which may be
    necessary or desirable to complete and execute any such Form 3, 4, or 5,
    complete and execute any amendment or amendments thereto, and timely file
    such form with the SEC and any stock exchange or similar authority; and
(4) take any other action of any type whatsoever in connection with the
    foregoing which, in the opinion of such attorney-in-fact, may be of benefit
    to, in the best interest of, or legally required by, me, it being understood
    that the documents executed by such attorney-in-fact on my behalf pursuant
    to this Power of Attorney shall be in such form and shall contain such terms
    and conditions as such attorney-in-fact may approve in such
    attorney-in-fact's discretion.

    I hereby grant to such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary, or proper
to be done in the exercise of any of the rights and powers herein granted, as
fully to all intents and purposes as I might or could do if personally present,
with full power of substitution or revocation, hereby ratifying and confirming
all that such attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this Power of
Attorney and the rights and powers herein granted. I acknowledge that the
foregoing attorney-in-fact, in serving in such capacity at my request, is not
assuming, nor is the Company assuming, any of my responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934.

     This Power of Attorney shall remain in full force and effect until I am no
longer required to file Forms 3, 4, and 5 with respect to my holdings of and
transactions in securities issued by the Company, unless earlier revoked by me
in a signed writing delivered to the foregoing attorney-in-fact.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 14th day of July, 2016.

                                        /s/ Elizabeth Timm
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                                        Signature

                                        Elizabeth Timm
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