Do I need permission from the city to place benches on sidewalks and in public places for a bench advertising business?
I reside in NYC and would like to know if I need to have any type of permission or license from the city before placing the benches around the city for a bench advertising business. If yes, what department do I get in contact with?
Generally, if you're going to install anything in a public space, you need permission of some sort. Otherwise, you can imagine the clutter that would appear in every park and sidewalk in the city if everyone did what you were proposing!
New York City government has a website portal for businesses in the city -- visit http://www.nyc.gov/portal/site/businessexpress. You might also try calling 311 to find the right department.