EXHIBIT 15.1

November 2, 2020

The Board of Directors and Stockholders of Alexander’s, Inc.

210 Route 4 East

Paramus, New Jersey 07652

We are aware that our report dated November 2, 2020, on our review of the interim financial information of Alexander’s, Inc. appearing in this Quarterly Report on Form 10-Q for the quarter ended September 30, 2020, is incorporated by reference in Registration Statement No. 333-212838 on Form S-8 and Registration Statement No. 333-224054 on Form S-3.

/s/ DELOITTE & TOUCHE LLP

New York, New York