Tree protection zones

This advice is for planning permit holders who are carrying out works where trees are to be retained and protected.

Most planning permits for development on treed sites will require you to install and maintain tree protection zones (TPZ) before any site work or demolition commences. They aim to prevent soil disturbance and damage to trees and vegetation on-site and nearby.

The TPZ fence must be at least 1.5 metres high and include a sign that says ‘Tree Protection Zone – No Entry’ on each side of the fence. Your permit condition will state the specific requirements.

The area will probably be at or beyond the drip line (canopy) of individual trees or around the outer canopy line where trees are grouped. Sometimes a qualified arborist may require a larger tree protection zone.

Activities that can’t occur in a TPZ

• Temporary buildings and works
• Storing materials including equipment, fuel, oil, chemicals, building waste or rubble
• Disturbing soil and grade changes
• Excavation, specifically open-cut trenches for underground utilities
• Attaching anything to any trees (service wires, nails, screws or other device)
• Servicing and refuelling of equipment and vehicles
• Unauthorised entry by any person, vehicle or machinery

Penalties for failing to protect trees

You must meet all requirements and conditions of your planning permit, including that of tree protection fencing. Penalties apply if you don’t; we can fine you for each tree affected.