A question for urban hunters

How exactly do you go about getting permission to hunt from a buisness? I have a retirement home near me that has 100 acres of swamp across the road from the actual facility, like it looks so damn good and I’m itching to ask permission but I’m unsure how to do it properly in this case. They also have almost 400 across the road surrounding the actual facility that looks good but I’m more interested in the swamp across the road. Any advice is appreciated