Services · Development & Planning

Council-ready impact reports for your build.

TPZ and SRZ mapping that protects trees and keeps your planning permit on track.

Development Impact Assessment (DIA)

A Development Impact Assessment is the pre-construction arboricultural report councils expect when a knockdown-rebuild, subdivision, extension or granny flat sits near protected trees. We map the Tree Protection Zone (TPZ) and Structural Root Zone (SRZ), assess how the design will affect those trees, and set out the mitigation that keeps both the tree and the build viable.

Without a council-ready DIA, a planning application stalls. Incomplete mapping leads to requests for further information, redesigns, stop-work notices, or a site that cannot be built as drawn. Getting the report right the first time is cheaper than discovering a protected tree after demolition.

Aerial inspection near a build — The tree and the building line in the same frame.

Protected tree beside a knockdown-rebuild — TPZ mapping starts with the tree on the ground.

You'll get

✓ TPZ and SRZ mapped on site
✓ Encroachment as a number, not a guess
✓ Mitigation the builder can actually build to
✓ Written in the format that council uses