I've not read the objections, but are you saying they are coming from the owners of the house where you have marked? A quick look on Google street view at that point shows that even in April when there is not much leaf cover (unfortunately there is no winter street view from that road) you can't see anything - 1) because of the amount of trees, 2) because of the steepness of the hillside and 3) because of the distance between the road and the top of the hill
I know Street view doesn't show the whole story, but if they are complaining about being able to see the building I mean
really? Or am I missing something?