SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No.     )*

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

[Check the appropriate box to designate the rule pursuant to which this Schedule is filed:]

¨ Rule 13d-1(b)

x Rule 13d-1(c)

¨ Rule 13d-1(d)

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934 (the “Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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    MPG Office Trust, Inc. (the “Issuer”)

    355 South Grand Avenue, Suite 3300

    Los Angeles, CA 90071

    This statement is filed by:

    (i) HG Vora Special Opportunities Master Fund, Ltd., a Cayman Islands exempted company (the “Fund”);

    (ii) HG Vora Capital Management, LLC, a Delaware limited liability company (the “Investment Manager”); and

    (iii) Parag Vora, an individual (“Mr. Vora”).

    The foregoing persons hereinafter sometimes are collectively referred to as the “Reporting Persons”. Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party. The Reporting Persons’ agreement in writing to file this statement on behalf of each of them is attached as Exhibit 1 hereto.

    The business office address of the Fund is Queensgate House, South Church Street, Grand Cayman, KY1-1108, Cayman Islands, and the business office address of the Investment Manager and Mr. Vora is 870 Seventh Avenue, Second Floor, New York, NY 10019.

    The Fund is a Cayman Islands exempted company, the Investment Manager is a Delaware limited liability company, and Mr. Vora is a United States citizen.

    Common Stock, $0.01 par value per share (the “Common Stock”).

    553274101

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    As of August 6, 2012, directly owned: 3,089,700 shares of Common Stock.

    6.09%. The percentages used herein and in the balance of this Item 4 are rounded to the nearest tenth and based on 50,766,560 shares of the Issuer’s Common Stock outstanding as of May 4, 2012, as reported in the Issuer’s Quarterly Report on Form 10-Q filed on May 10, 2012.

    (i) Sole power to vote or to direct the vote: 0

    (ii) Shared power to vote or to direct the vote: 3,089,700

    (iii) Sole power to dispose or to direct the disposition of: 0

    (iv) Shared power to dispose or to direct the disposition of: 3,089,700

    As of August 6, 2012, may be deemed to have beneficially owned: 3,089,700 shares of Common Stock.

    6.09%.

    (i) Sole power to vote or to direct the vote: 0

    (ii) Shared power to vote or to direct the vote: 3,089,700

    (iii) Sole power to dispose or to direct the disposition of: 0

    (iv) Shared power to dispose or to direct the disposition of: 3,089,700

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    As of August 6, 2012, may be deemed to have beneficially owned: 3,089,700 shares of Common Stock.

    6.09%.

    (i) Sole power to vote or to direct the vote: 0

    (ii) Shared power to vote or to direct the vote: 3,089,700

    (iii) Sole power to dispose or to direct the disposition of: 0

    (iv) Shared power to dispose or to direct the disposition of: 3,089,700

If this statement is being filed to report the fact that as of the date hereof, the Reporting Persons have ceased to be the beneficial owner of more than five percent of the class of securities, check the following ¨.

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Each of the Reporting Persons hereby makes the following certification:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

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SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

August 6, 2012

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Exhibit 1

The undersigned parties hereby agree that the Schedule 13G filed herewith (and any amendments thereto) relating to the Common Stock of MPG Office Trust, Inc., is being filed jointly on behalf of each of them with the Securities and Exchange Commission pursuant to Section 13(d) of the Securities Exchange Act of 1934, as amended.