Arboricultural Impact Assessment NSW — Council-Ready Reports That Get Your DA Approved First Time

Yes — for most standard residential and small commercial Arboricultural Impact Assessments, the TPP and TPS are included as part of the AIA deliverable package, not commissioned as separate later engagements. You get one coordinated document set covering the assessment, the protection-zone calculations, and the on-site protection measures your builder and certifier need. Standalone TPP/TPS engagements are only required for staged works, major infrastructure or commercial projects, or post-approval changes to the protection regime — we’ll flag if your project falls into one of those categories when we quote.

For larger projects, or projects where design and tree retention need to be carefully balanced, the preferred order of operations is:

1. Preliminary Arboricultural Report (PAR) — assesses trees on site and their retention value, calculates NRZ and SRZ protection zones, and (critically) delivers the tree positions + NRZ/SRZ circles as GIS-ready spatial data that imports directly into your architect’s design software (AutoCAD, Revit, ArchiCAD, QGIS — formats to suit). Your architect can see exactly what trees their proposed design will impact, in their own design environment, while design decisions are still cheap to change. Includes preferred TPP/TPS layouts to inform the design.
2. Architect’s design — the design develops around the tree constraints and preferred protection layouts identified in the PAR.
3. Full AIA — uses the tree data already collected in the PAR, plus the now-finalised design, and develops the formal TPP and TPS for council submission.

Because the AIA picks up the assessment work the PAR already did, combined PAR + AIA cost is usually close to a single-stage AIA — but the design outcome is significantly better, and the architect avoids the most expensive risk on a tree-affected project: discovering at AIA stage that the design needs to be reworked to accommodate trees they hadn’t accounted for. With the PAR’s GIS data live in their CAD/BIM software from day one, there are no surprises when the formal AIA lands. No late redesigns. No rework cycles. No project delays. For simple single-dwelling sites with clear constraints, a single-stage AIA in one go is usually fine.

Most single-dwelling AIAs on straightforward residential sites start at $1,800 + GST. Larger sites, subdivisions, commercial work and sites with significant retained vegetation are quoted individually. Every AIA is delivered as a fixed-fee engagement — you get the total price upfront, no hourly billing surprises.

Standard turnaround is two weeks from site inspection to lodged report. Fast-track delivery within 48 hours is available for council RFI deadlines or tight DA timeframes — mention it when you request a quote and we’ll confirm whether we can hit your deadline.

Three things. First, our principal consultant is a Licensed NSW Builder as well as an AQF Level 5 Consulting Arborist — recommendations are designed to work on a real construction site, not just on paper. Second, we’re on the current standard (AS 4970-2025 with the new NRZ/TPZ/SRZ terminology and three-tier encroachment classification) — many competitors are still citing AS 4970-2009. Third, we have in-house Air Spade equipment for non-destructive root investigations, so we can answer the hard questions (“are the roots actually there?”) in days rather than weeks.

In most NSW council areas, yes — an AIA is typically required as part of the DA package whenever trees are present on or near the site. Lodging without one usually triggers a Request for Information that delays your application by weeks. If you’re unsure about your specific council’s requirements, send us the site address and we’ll check before quoting, at no charge.

Our AIAs are written specifically to meet the documentation requirements of NSW councils across the Hunter, Central Coast, Mid North Coast and Sydney, and prepared to AS 4970-2025 — the current Australian Standard councils reference when assessing tree protection. In 15+ years of consulting we have not had a report rejected on technical grounds.

Yes — RFI responses are common work for us. Forward the council’s request with your DA documents and we’ll prepare a supplementary AIA report addressing the specific matters council has raised. Fast-track delivery available for tight RFI deadlines.

Yes — for trees the proposed development can’t retain, our Arboricultural Impact Assessment quantifies the loss and specifies the replacement, compensatory or offset planting regime council requires as a consent condition. That includes species selection (locally appropriate, council-approved), planting sizes, locations, establishment care, irrigation requirements and post-planting maintenance commitments. NSW councils almost always require this for any DA that involves removal of established trees — it’s not an optional add-on, it’s part of getting your DA approved. We build it into the AIA so the impact assessment, the protection regime AND the offset regime arrive as one coordinated document set.

Note: this is one of the meaningful differences between an AIA and a Preliminary Arboricultural Report (PAR). A PAR can’t specify replacement plantings because the design isn’t finalised yet — you can’t replant what you don’t yet know is being removed. PARs deliver upstream input (retention values for design prioritisation); AIAs deliver the downstream council-facing specification.

We don’t perform tree removal or general tree work ourselves — that’s deliberate. We’re an independent consultancy, so our retention recommendations aren’t influenced by what tree work we’d like to win. We DO offer Tree Works Management (coordinating qualified tree contractors who execute the works) as a bundled service for larger projects — useful when the project benefits from one accountable AQF5 across the whole sequence. See Tree Works Management →