Where the data comes from
Every AddressTwin report is built from official and reputable WA data. Below is what we use, who publishes it, how often it updates, how precise it is — and, just as importantly, the known limitation of each, so you know what to verify before you make an offer.
The inventory
Some data layers are address-specific. Others may be suburb-level, district-level, regional, estimated or proxy-based. Each report shows the source, date, granularity and confidence level for every layer.
| Source | Provider | Used for | Frequency | Granularity | Known limitation |
|---|---|---|---|---|---|
| Bushfire Prone Area Mapping | DFES WA | Bushfire risk | Annual / as updated | Address / area | Must verify directly with DFES. |
| Crime statistics | WA Police | Crime context | Quarterly | District / suburb | May not reflect exact suburb / property. |
| Census | ABS | Demographics | 5-yearly | SA / suburb | 2021 data may be outdated. |
| My School | ACARA | School context | Annual | School-level | Proximity does not confirm catchment. |
| Contaminated Sites Register | DWER / EPA WA | Contamination context | As updated | Site / proximity | Register does not replace environmental assessment. |
| Air quality | EPA WA | Air quality | Varies | Proxy (nearest station) | Nearest-station proxy, not property-specific. |
| Aircraft noise (ANEF / N70) | Airservices Australia | Aircraft noise | As updated | Suburb / contour | Contour-based, verify at inspection times. |
| Traffic (AADT) | Main Roads WA | Traffic noise | Periodic | Proxy (distance to arterial) | Distance-from-centroid proxy. |
| Transit | Transperth | Transit access | As updated | Address / proximity | Stop locations; service frequency varies. |
| Property sales | Landgate | Price context | As updated | Suburb | Context only, not a valuation or advice. |
Some data layers are address-specific. Others may be suburb-level, district-level, regional, estimated or proxy-based. Each report shows the source, date, granularity and confidence level for every layer.
Credit where it's due
AddressTwin acknowledges the use of open and reputable data published by the providers above, under the terms of each respective licence. We make no claim of ownership over the underlying datasets — we provide an aggregation, plain-English explanation and confidence-rating layer on top.
No single source is a substitute for direct verification. Before you make an offer, confirm anything that matters with the official provider and the right qualified professional. See the methodology for how each source feeds a report, and the legal disclaimers for the limitations of using this data for property decisions.