Exhibit 23.1

Consent of Independent Auditors

We consent to the incorporation by reference in the Registration Statements (Form S-3 for the registration of (i) $500,000,000 of its common stock, preferred stock, depositary shares and warrants, No. 333-113076; (ii) 2,383,284 shares of its common stock, No. 333-70111 and (iii) 1,173,232 shares of its common stock, No. 333-30394 and Form S-8 pertaining to the Amended 1997 Stock Option and Incentive Plan) of SL Green Realty Corp. and in the related Prospectus of our report dated January 30, 2004 (except for Note 24 as to which the date is February 27, 2004) with respect to the consolidated financial statements and schedule of SL Green Realty Corp. and our report dated January 22, 2004  with respect to the consolidated financial statements of Rock-Green Inc. included in this Annual Report (Form 10-K) for the year ended December 31, 2003.

	/s/ Ernst & Young LLP
New York, New York
March 15, 2004