Where this data comes from
Every dataset used, with its licence and what it covers. If a state is missing from this table, it is missing from the site.
| Source | Covers | Licence |
|---|---|---|
| NSW Valuer General — Property Sales Information https://valuation.property.nsw.gov.au/embed/propertySalesInformation | Every NSW property sale, 1990 to the current week | Creative Commons BY-NC-ND 4.0 — attribution, non-commercial, no derivatives |
| NSW Planning Portal — Online DA open API planningportal.nsw.gov.au | Every development application lodged in NSW since 2019, with address, coordinates, cost of works and dwelling counts | Open, no key required |
| ABS 2021 Census — Selected Medians and Averages data.api.abs.gov.au | Median rent, mortgage repayment, household income and household size for every statistical area in every state and territory | Creative Commons Attribution 4.0 International |
| ASIC — Company Dataset data.gov.au | Every registered Australian company: name, ACN, ABN, status, type, registration date | Creative Commons Attribution 3.0 Australia |
The sales data is not openly licensed, and that matters. The NSW Valuer General publishes bulk Property Sales Information under Creative Commons BY-NC-ND 4.0 — attribution, non-commercial use only, and no derivative works. That is materially narrower than the CC-BY terms carried by the planning, heritage, Census and company datasets on this page. This site previously described it as simply “Creative Commons”, which understated the restriction; that was wrong and is corrected here.
What is not here, and why
- Other states and territories. There is no national sales register. Victoria publishes suburb-level medians rather than individual transactions, and its statewide file sits behind a bot challenge; several states put transaction data behind a paid licence with their land-titles office. Only registers that are genuinely free and openly licensed are used here.
- Properties currently for sale. This site carries none. Live listings belong to agents and the portals they pay, not to any public register, and there is no open-data source for them.
- The name of anyone who bought or sold. The NSW sales register publishes no buyer or seller, and the NSW planning API has no applicant, owner or company field at all — both checked directly against the data, not assumed. So this site can show that fifteen properties changed hands in one transaction, but never who bought them. That link needs a paid title search, and no combination of open data substitutes for it.
- Company directors and shareholders. ASIC's free dataset carries company identity and status only. Officers are not published free.
- Anything behind a bot wall. The NSW register is also served from a host fronted by a bot challenge. This site reads the same files from the publisher's plain public path instead; no challenge is circumvented, and any source whose robots.txt excludes automated access is left alone.