Calculate Your Tree Protection Zone (TPZ) with Ease

Develop Arborist Reports and Ensure Compliance with AS 4970-2009 Standards

Tree Protection Zone (TPZ) and Structural Root Zone (SRZ) are critical areas around trees that help protect their health and stability, especially during construction or development. The TPZ is the area surrounding a tree where disturbance or damage should be minimised to preserve the tree's overall health. It typically considers the tree's canopy size and root structure.

The SRZ is a more specific zone that focuses on the tree’s root system, aiming to protect the most critical roots responsible for the tree’s structural stability and nutrient uptake. On development sites, understanding and preserving both zones is essential for preventing tree damage, ensuring long-term tree health, and meeting regulatory requirements.

By properly calculating and adhering to TPZ and SRZ guidelines, developers, draftsman, architects, and property owners can optimise planning, mitigate risks, avoid costly fines, and promote sustainable development practices.