This Tipuana (Tipuana tipu) is actually two - I just lined the trunks up to make it look like one :)
Tip: click the photo to have a good look.
They're flanking the driveway of an old house in Floreat and as you can see from the size of my car under them, they're BIG. But there was surprisingly little root heave. Some lumps and bumps in the lawn and a few cracks in the driveway but that was about it.
They certainly passed my "don't-want-to-leave" test and reinforced to me why they're on my Trees for Perth list.