Exhibit 23.2(a) Consent of Ernst & Young CONSENT OF INDEPENDENT AUDITORS We consent to the reference to our firm under the caption "Experts" in the Registration Statement on Form S-3 pertaining to the Rights to Purchase up to 4,418,540 shares of Common Stock of Grubb & Ellis Company and subsidiaries and to the incorporation by reference therein of our report dated March 29, 1994, with respect to the financial statements and schedules of Grubb & Ellis Company and Subsidiaries included in the Annual Report (Form 10-K and Form 10-K/A (Amendment No. 2)) for the year ended December 31, 1993, filed with the Securities and Exchange Commission. Very truly yours, ERNST & YOUNG San Francisco, California July 21, 1994