I think this is a Queensland Box tree which unusually has been left intact. Generally in this part of the world if a tree grows its fair game to be hacked and butchered into something that does not resemble a naturally grown tree at all. This tree provides deep shade for the front of the house and garden which is something Western Australian natives often fail to do. It always seems that where trees that provide good shade are needed the WA natives are planted and along roads where there is no parking there always seem to be good shade trees. A deceased good friend of mine was keen observer of such conundrums, Harry called it Sods law and in such cases a sod it is!