Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements (Forms S-3 No. 333-45533, No. 333-39289, No. 333-135503, No. 333-100631, No. 333-63176, No. 333-80835, No. 333-72961, No. 333-12983, No. 333-06873, No. 33-97680 and No. 33-84974; Forms S-8 No. 333-06869, No. 333-107244, No. 333-83403, No. 333-102609, No. 333-66257 and No. 333-88237; and Forms S-4 No. 333-44576 and No. 333-35873) of Equity Residential and in the related Prospectuses of our reports dated February 22, 2007, with respect to the Statement of Revenue and Certain Expenses of 600 Washington Street, Cove at Boynton Beach I & II, Missions at Sunbow, Tuscany at Lindbergh, The Park at Turtle Run, Estates at Wellington Green, Playa Pacifica, Kings Colony, Lincoln Green, Uptown Square, Kenwood Mews, The Gallery and San Marcos included in this Current Report on Form 8-K.

	/s/ Ernst & Young LLP
	Ernst & Young LLP

Chicago, Illinois

March 1, 2007

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements (Form S-3 No. 333-135504 and Forms S-4 No. 333-44576 and No. 333-36053) of ERP Operating Limited Partnership and in the related Prospectuses of our reports dated February 22, 2007, with respect to the Statement of Revenue and Certain Expenses of 600 Washington Street, Cove at Boynton Beach I & II, Missions at Sunbow, Tuscany at Lindbergh, The Park at Turtle Run, Estates at Wellington Green, Playa Pacifica, Kings Colony, Lincoln Green, Uptown Square, Kenwood Mews, The Gallery and San Marcos included in this Current Report on Form 8-K.

	/s/ Ernst & Young LLP
	Ernst & Young LLP

Chicago, Illinois

March 1, 2007