Building Access Law School Campus Map Expand all Collapse all Law School Campus Access (Winter Break - 12/24/25 to 1/5/26) Jerome L. Greene Hall Main Entrance (435 West 116th Street) Operating Hours for Law School CUID Cardholders Monday – Friday: 7:00 A.M. to 11:00 P.M.Saturday & Sunday: 7:00 A.M. to 11:00 P.M. William and June Warren ("Big Warren") Hall Main Entrance (1125 Amsterdam Avenue) Operating Hours for Law School CUID Cardholders7 Days: 7:00 A.M. to 11:00 P.M. William C. Warren ("Little Warren") Hall Main Entrance (410 W. 116th Street) Operating Hours for Law School CUID Cardholders Monday – Friday: 7:00 A.M. to 10:00 P.M.All other times: Columbia Law Review students and Law School staff only Greene Annex Main Entrance (Across from East Campus) Operating Hours for Law School CUID Cardholders Monday – Friday: 7:00 A.M. to 10:00 P.M. The Greenhouse Main Entrance (424 W. 116th Street)CUID cardholder access for members of Journals only
