A property description can combine facts from different dates: an old land purchase, a recent photograph, a current room count and a future income scenario. This guide helps buyers keep those observations separate before using them in a purchase or development decision. Start with the actual question, then identify the source that can answer it.
Build an evidence register before a price conclusion
For each important claim, record the property or sale event, the source document or URL, the event date, the date retrieved, the reviewer and the next action. A successful data query is evidence that a query returned something; it does not establish that the source is complete, current or applicable to your proposed use. Keep unknown and conflicting information visible.
Match the evidence to the decision
These checks are separate because they answer different questions. A favourable market comparison cannot close an unresolved title question; a scaled concept cannot establish a permit. Use each result to decide what needs further review at the particular address.
| Decision | Evidence to request | What it cannot establish alone |
|---|---|---|
| Transaction product | Dated sale description, contract timeline and building-state evidence | A current photograph cannot prove the condition at an earlier sale. |
| Rooming house operation | Relevant premises and operator records, anonymised operating history | A candidate address or licence alone does not prove the proposed operation. |
| Unit configuration | Plans, dated photographs, inspection and title documents | A portal category or bathroom counter cannot prove the complete product. |
| Title and site | Title, subdivision documents, appropriate survey and current planning assessment | A map or concept layout cannot confirm legal rights or approval. |
| Income and costs | Period-specific agreements, reconciled receipts and a scoped cost register | Advertised rent and a building-only quote cannot establish project cash flow. |
| Market comparison | Matching product, dates, price sources, sample and coverage notes | A small-sample median cannot establish a resale result for another property. |
Use explicit evidence states
Keep a status on every row and identify what would change it. Do not make missing information look like a negative finding. An unknown bathroom is not a shared bathroom; a missing sale price is not zero; an empty constraint layer is not a clear site.
Supported observation
The cited source supports this specific observation at the stated date. Other decisions may still require separate evidence.
Inference
The interpretation uses stated assumptions. Record the reasoning and the evidence that could confirm or overturn it.
Unresolved
Information is missing, conflicting, outside source coverage or pending review. Assign a responsible person and next action.
Read the decision guides
Rooming house evidence
Rooming House Sale Timeline: Land Purchase or Completed Building?
Build a dated rooming house sale timeline before using a comparable. Separate land, permitted projects and operating buildings, and preserve unresolved evidence.
Read the guideRooming House Ensuite Evidence: Comparing Eight and Nine Rooms
Compare rooming house rooms, private ensuites and shared facilities using dated plans and operating evidence. Keep unknown bathrooms separate from confirmed shared ones.
Read the guideRooming House Register Counts: Candidates, Operating Stock and Supply
Separate rooming house candidate records, registered premises, licensed operators and verified operating stock before interpreting market supply or sales frequency.
Read the guideRooming House Rent Evidence: Advertised, Agreed and Collected Income
Build a rooming house income bridge from room advertisements to agreements and collected receipts. Identify occupancy, inclusions, arrears and the cost denominator.
Read the guideBuying an Operating Rooming House: Evidence Behind a Tenanted Sale
Check the operating evidence behind a tenanted rooming house sale: anonymised income, premises and operator records, service responsibilities and handover conditions.
Read the guideUnit sale evidence
Single-Storey Unit Comparables: Why Apartments Need a Separate Set
Select single-storey unit comparables by built form, title, private outdoor space and shared obligations. A portal unit label does not establish a matching product.
Read the guideTwo-Bedroom Two-Bathroom Unit Evidence Checklist for Buyers
Verify two-bedroom two-bathroom unit layouts using plans, dated photos, inspection and title records. Check actual facilities, usable space and shared obligations.
Read the guideProperty Exterior AI Checks: Material Evidence and Unknown Results
Use AI exterior observations as research flags. Distinguish visible surfaces from structural systems, photo dates and unknown material before comparing sales.
Read the guideMarket research methods
Comparable Sales Small Samples: What a Median Can and Cannot Say
Read a comparable-sales median with its sample size, dates, missing fields and product definition. Compare individual observations before using a sparse market result.
Read the guideDays on Market Evidence: Contract Dates, Campaigns and Relistings
Check days-on-market calculations against the sale event and campaign timeline. Keep later campaigns, withdrawn listings, relistings and unknown dates separate.
Read the guideProperty Address Deduplication: Same Address, Different Lots and Sales
Deduplicate property research without merging separate lots or sale events. Reconcile spelling, unit numbers, parcel identifiers and subdivision changes with title evidence.
Read the guideCouncil and Suburb Market Comparisons: Match Boundaries Before Prices
Check geographic definitions, boundary dates and product mix before comparing council and suburb prices. Keep metro labels and cross-state policy meanings explicit.
Read the guideProperty Listing History: Asking Prices, Search Values and Sold Evidence
Read property listing history without confusing asking guides, portal search values, estimates and disclosed sale prices. Preserve relistings, dates and source revisions.
Read the guideDevelopment decisions
Development Site Missing Data: No Result Is Not a Clear Site
Read development-site missing data using coverage, source status and verification steps. Distinguish no matching record, failed retrieval and confirmed absence before buying.
Read the guideResidual Land Price Research: Connect Exit Evidence to Full Project Cost
Use a residual land-price worksheet with a supported exit scenario, complete project costs and dated cash timing. Keep price research separate from valuation and personal advice.
Read the guideDevelopment Evidence Register: What to Resolve Before an Offer
Create a development evidence register before an offer. Link each claim to dated title, planning, survey, services, building and market evidence with a named next action.
Read the guideDownload the original research checklist
The checklist contains our original evidence-register headings and method notes. It contains no proprietary sale records, client details or third-party images. Reuse it with attribution under CC BY 4.0; verify the source material separately for your address and decision.
Questions buyers ask
Can a current rooming house appearance prove an earlier completed-building sale?
No. Establish the product at the sale date using dated contemporary evidence. Later photographs, registration or rent advertisements can raise questions but do not automatically answer them.
Are research product filters legal definitions?
No. A selected room count, ensuite arrangement, price threshold or unit form defines a comparison set. Legal classification, licensing and approvals require separate sources and review.
What does no matching record mean?
It describes the queried source under its coverage and matching rules. Check identity, dates, source status and missing fields before concluding that a property, constraint or transaction does not exist.
Primary sources checked
Government guidance supplies context for the relevant issue; it does not certify our research sample or your project. Follow the source and seek the appropriate property-specific review.
- Consumer Affairs Victoria: buyer due diligence checklist
- Consumer Affairs Victoria: property prices and underquoting
- Consumer Affairs Victoria: rooming house operator definitions
- Consumer Affairs Victoria: rooming house operator public register
- Planning Victoria: planning permits
- ASIC Moneysmart: buying an investment property