That is a nono. The old saying of whoever owns the land owns it up the heaven and down to the hell, is gone, we gave it up i suppose. Now there are countries who will give you air airspace control upto immediate enjoyment or effective enjoyment of the land. We can argue that drones and internet falls within this enjoyment criteria.
Permission is required either way in us uk too, move a bit higher, its airspace, property of the state.
If we are to operate in the lower zones above buildings etc, why go with drones? Just stick the antenna on top of a long stick aka a tower.
How far up from the building is the drone tho? 200 ft? Also see my edited comment above.