1 EXHIBIT 23.3 Consent of Independent Auditors We consent to the reference to our firm under the captions "Experts," "Summary Selected Financial Information" and "Selected Financial Information" and to the use of our reports indicated below in this registration statement on Form S-11 of Equity Office Properties Trust. DATE OF AUDITORS' FINANCIAL STATEMENTS REPORT - -------------------------------------------------------------------------------- Consolidated financial statements and financial statement February 23, 1998, schedule III, Real Estate and Accumulated Depreciation, of except for Note 25, as Equity Office Properties Trust as of December 31, 1997 and to which the date is March for the period from July 11, 1997 to December 31, 1997, and 18, 1998 the combined financial statements of the Equity Office Predecessors as of December 31, 1996 and for the period from January 1, 1997 to July 10, 1997 and for the years ended December 31, 1996 and 1995 Statement of Revenue and Certain Expenses of 177 Broad March 28, 1997 Street for the year ended December 31, 1996 Statement of Revenue and Certain Expenses of Preston April 16, 1997 Commons for the year ended December 31, 1996 Statement of Revenue and Certain Expenses of Oakbrook May 30, 1997 Terrace Tower for the year ended December 31, 1996 Statement of Revenue and Certain Expenses of One Maritime June 6, 1997 Plaza for the year ended December 31, 1996 Statement of Revenue and Certain Expenses of 201 Mission April 30, 1997 Street for the year ended December 31, 1996 Statement of Revenue and Certain Expenses of 30 N. LaSalle June 13, 1997 for the year ended December 31, 1996 Combined Statement of Revenue and Certain Expenses of the September 3, 1997 Columbus America Properties for the year ended December 31, 1996 2 DATE OF AUDITORS' FINANCIAL STATEMENTS REPORT - -------------------------------------------------------------------------------- Combined Statement of Revenue and Certain Expenses of the September 3, 1997 Prudential Properties for the year ended December 31, 1996 Combined Statement of Revenue and Certain Expenses of September 24, 1997 550 South Hope Street for the year ended March 31, 1997 Combined Statement of Revenue and Certain Expenses of the September 9, 1997 Acorn Properties for the year ended December 31, 1996 Combined Statement of Revenue and Certain Expenses of 10 September 5, 1997 & 30 South Wacker Drive for the year ended December 31, 1996 Statement of Revenue and Certain Expenses of One Lafayette September 5, 1997 Centre for the year ended December 31, 1996 Combined Statement of Revenue and Certain Expenses of the January 22, 1997 PPM Properties for the year ended December 31, 1996 Combined Statement of Revenue and Certain Expenses of the September 26, 1997 Wright Runstad Properties for the year ended September 30, 1996 /s/ ERNST & YOUNG LLP Ernst & Young LLP Chicago, Illinois May 28, 1998