Building Access and Information Law School Campus Buildings Hours and Entrances (Fall 2023) Expand all Collapse all Jerome L. Greene Hall Main Entrance (435 W. 116th Street) Monday – Sunday: 7:00 A.M. to 11:00 P.M. Revson Plaza Entrance (3rd Floor) Monday – Friday: 8:00 A.M. to 6:00 P.M. William and June Warren ("Big Warren") Hall Main Entrance (1125 Amsterdam Avenue) Monday – Thursday: 7:00 A.M. to 9:00 P.M. Friday: 7:00 A.M. to 6:00 P.M. Saturday & Sunday: Law School CUID only William C. Warren ("Little Warren") Hall Main Entrance (410 W. 116th Street) Monday – Friday: 7:00 A.M. to 10:00 P.M., Law School CUID only All other times: Columbia Law Review students and Law School staff only Greene Annex Main Entrance (Across from East Campus) Monday – Friday: 7:00 A.M. to 10:00 P.M., Law School CUID only The Greenhouse Main Entrance (424 W. 116th Street) Law School CUID only for Journal Students
