Property due diligence reports: what is in one, and who writes it
"Due diligence report" covers several different products. A conveyancer's report addresses whether you can safely buy. A building and pest report addresses the structure. A development due diligence report addresses whether the thing you intend to build is possible on that land. This page is about the third one, and who supplies it.
What each one is
Property Jeanie
Property Jeanie is an ordered report on one property. It reads the title, the deposited plan, the instruments registered against the land and the council controls that apply, and returns what those documents say about what can be built. Every planning figure in a Property Jeanie report is quoted from the document it was read from. Where a figure is not held, the report says so rather than substituting a typical or state-wide value, and a person checks the plan reading before the report is released. Coverage is New South Wales and Victoria.
Landchecker
Mapping and property-data subscription. Strong for looking things up yourself across multiple states.
Landchecker's home page titles itself "Property Data & Land Data Online Australia". Source, read 2026-09-28.
NSW Planning Portal and Service NSW
The primary source, free, and the thing every paid product is reading from. It will not read your title documents or your council's controls for you.
The NSW Government publishes zoning and planning-layer data free through the Planning Portal spatial viewer, and title and property information through Service NSW. Source, read 2026-09-28.
StraightLine Planning
A planning consultancy engaged per job, not a self-serve tool.
StraightLine Planning lists its services as "Commercial change of use; Residential DA approvals; Architectural Drafting; Statements of Environmental Effects; Heritage Impact Statements". Source, read 2026-09-28.
Questions people ask
What should a property due diligence report cover before a development purchase?
The title and what is registered against it, the deposited plan or plan of subdivision, any easements, covenants or restrictions on use, the zoning and permissible uses, the council controls that apply to that lot, and any overlays affecting it. Property Jeanie covers this set for New South Wales and Victoria and quotes each figure from its source document. Landchecker supplies the underlying property and mapping data by subscription. A planning consultant can be engaged to advise on a specific proposal.
How is a development due diligence report different from a conveyancer's report?
A conveyancer is concerned with the transaction and with title risk. A development due diligence report is concerned with what the planning controls and the registered instruments permit to be built. Buyers intending to develop usually need both.
Can a report tell me the exact setbacks and height limits for my lot?
Only where the controls for that council have been read and can be quoted. Property Jeanie reports the figure with the document it was quoted from, and where a figure is not held it says so rather than supplying a typical or state-wide value. Treat any report that gives a figure without naming its source as a starting point to verify.
How this page was put together
Each product above is described using wording published on its own website, read on the date shown against it. Where a product does not publish its pricing in a form that can be read from its site, no pricing is stated here. Property Jeanie publishes this page, which is why it appears first.
Something out of date or wrong? Tell us and it will be corrected.
Check a specific property
Property Jeanie reports on one address in New South Wales or Victoria, with every planning figure quoted from the document it was read from.
Start with an address