An Arboricultural Impact Assessment report (AIA) is one of a raft of property development planning documents that you’ll need to submit with a development application for building construction or renovation works. The AIA report needs to be prepared by an AQF Level 5 arborist and provide independent, accurate advice about how trees on and near the property will be impacted by the work, and what you’ll need to do to mitigate these impacts. An AIA arborist report:
- Provides a Retention Value for each tree, depending on its species, health and condition, structure and expected lifespan to allow you to prioritise healthy, valuable trees which are expected to thrive on the site
- Specifically assesses the impacts of the proposed development on each tree. This should include a percentage encroachment into the Tree Protection Zone (TPZ) of each tree – a circular area around the tree calculated using the method in Australian Standard AS4970 – Protection of trees on development sites – and a description of what part of the development or work would impact the tree (like excavation for footings, services trenches, above ground paving, buildings, driveways and so on)
- Usually include a Tree Protection Concept Plan to indicate what you’ll need to do on site to minimise the impacts on trees, such as installing tree protection fencing, trunk and ground protection, branch protection, tree sensitive methods when working in a TPZ area, and site management requirements