Is there subway access nearby or other public transportation options? I am considering doing an event at this location and would like to know the best way to get there. I would be taking a train into the Port Authority (either newark or new york).

Depending where in NYC ur coming from metro north Grand Central Station to White Plains (Harlem Line) or you can also go via Subway to the Bedford Park subway station then transfer to Bee-Line Bus number 20 take that all the way to White Plains can get off that bus in the last stop man it's a block-and-a-half walk right across the street

Best you take train from grand central to white plains it's not to far from train station about 6 blocks to maraneck ave