Do I need permission to remove a tree on my own property?
Often, yes. Most councils protect trees above a certain size or of listed species even on private land, and fines for illegal removal run into the tens of thousands. Check your council's significant tree register before you book anything, because reputable arborists will ask. Removal itself prices by size: $250 to $800 small, $800 to $2,500 medium, $2,500 to $6,000 large. Tip: if the tree is dead or dangerous, many councils fast-track approval; photograph everything and say so in the application.
Full ranges, factors and sources: Tree Removal cost guide.