Do I need council approval to remove a tree in The Hills or Hornsby?

Both The Hills Shire and Hornsby councils protect trees through their planning controls. Removing a protected tree without approval can lead to significant fines, so it pays to know where you stand before the chainsaw comes out.

The short version

Many established trees are protected and need council approval to remove or prune heavily. However, there are exemptions for certain species, sizes, dead trees, and trees that are a genuine hazard. The detail varies between councils and changes over time.

What is usually protected

• Trees above a certain height and trunk size
• Native and locally significant species
• Trees within heritage or environmental zones

What is often exempt

• Certain declared weed or pest species
• Small trees below the council threshold
• Dead trees and genuine hazards, though documentation may still be needed
• Clearing allowed under the 10/50 bushfire entitlement in eligible areas

How arborist reports fit in

When council does require approval, they often ask for an arborist report. This documents the tree's health, structure and risk, and the reason for the proposed work. A clear report from a qualified arborist gives council what they need to assess the application.

The safe way to do it

Do not assume, and do not rely on what a neighbour did. Rules differ block to block. We can check whether your specific tree is protected, advise on exemptions, and prepare a report if council needs one. Send us a photo and your address to start.

For more on what you can clear near your home in a bushfire area, see our guide on the 10/50 vegetation clearing entitlement.