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Understanding data provenance
How to interpret the data source and confidence indicators on each property.
Understanding data provenance
Every piece of data in a Property Passport has a provenance indicator showing where the data came from and how reliable it is.
Confidence levels
| Level | Meaning |
|---|---|
| Verified | Data confirmed against an authoritative source (e.g. Land Registry, HMRC) |
| Official | Data from an official but non-verified source (e.g. local authority records) |
| Reported | Data entered by the owner or agent — not independently confirmed |
| Estimated | Modelled or inferred data |
Data sources
Common sources include:
- HM Land Registry — ownership, title, price paid
- MHCLG — EPC certificates and energy data
- Ordnance Survey — UPRN, address matching
- Environment Agency — flood risk
- Local authorities — planning applications and decisions
Why this matters for professionals
When using passport data in legal or financial work, always confirm the confidence level. Verified and Official data can typically be relied upon; Reported data should be independently confirmed.