My neighbors have dropped this chimney about 4 meters away from my window ... If there is gas, I can not do the window anymore because it stinks for gas. Is that allowed?
That does not look after a permitted construction. Alone the distance to your window is far too low. To my knowledge, the chimney opening must be at least 15m. Turn to your district chimney sweep.
That should not be allowed. Call for your district chimney sweep, which can check this
This is unpleasant, district chimney sweep call.
Maybe it makes unpleasant "evidence" disappear.