Helicopter

There was a tremendous noise from the field behind the house - it was this helicopter coming in to land! It is a rugby field - not an airport!! How do they get permission to do this? We watched as a couple of people got out and the helicopter left - again with a tremendously loud roar!! However about three hours later it returned, and collected its passengers and off it flew again. I know I would not like to live so close to a real airport !!