Open Data Sources

Our Approach to Data

Property Passport UK aggregates publicly available data from official government sources to create a comprehensive property record. We do not originate data — we source, attribute, and present it transparently. Every data section shows the originating provider and the date it was last refreshed.

Live Data Sources

These sources are fully integrated and serving data on Property Passports today.

Integrations in Progress

These sources are partially integrated. Data may appear on some Property Passports but coverage is not yet complete or fully validated.

Planned Data Sources

These sources are on our roadmap. We will integrate them when engineering work is complete and sources meet our data quality and licensing standards.

• Council Tax Band— Valuation Office Agency (VOA)
• Crime Statistics (Street-Level)— Police UK / Home Office
• NHS GP Surgeries (Nearest)— NHS / ODS
• UKCP18 Climate Projections— Met Office

How Data Is Aggregated

All property data is matched using the UPRN (Unique Property Reference Number) as the canonical identifier. The UPRN is assigned by Ordnance Survey and uniquely identifies every addressable location in Great Britain.

Our aggregation pipeline works as follows: we download bulk datasets from each source provider; match addresses to UPRNs using address normalisation and fuzzy-matching algorithms; link matched records to the UPRN with full provenance metadata; and display each data point alongside its source, retrieval date, and confidence score.

Only high-confidence matches (typically ≥85%) are displayed. Lower-confidence matches are flagged or omitted to avoid misleading users.

Update Frequency and Data Freshness

Data is refreshed on schedules that balance timeliness with system efficiency:

• Real-time: Flood warnings are fetched on-demand from the Environment Agency real-time API each time a property page is viewed.
• Monthly: EPC certificates, price paid data, and school data are synchronised monthly from their source providers.
• Quarterly: Ordnance Survey open data, planning constraints, and heritage data are updated quarterly.
• Annual: Broadband availability (Ofcom) and BGS geology/radon data.
• Every ~4 years: Indices of Multiple Deprivation (ONS). The 2019 edition is current; a 2023 update has been delayed by ONS.

Disclaimers and Limitations

All data on Property Passport UK is provided for information purposes only and is not a substitute for professional advice. In particular:

• Flood risk:Data is advisory and indicative. Official flood risk for conveyancing should be obtained from a professional flood risk assessment or the Environment Agency's long-term flood risk service.
• Planning constraints: Planning constraint data reflects records submitted to the national Planning Data Platform and may lag local authority records. Always contact the relevant Local Planning Authority for definitive planning guidance.
• Listed buildings and heritage: Curtilage listings and associated asset designations may not be fully captured. Contact Historic England or the local planning authority for definitive heritage status.
• EPC ratings: EPC data reflects the most recent assessment, which may be many years old. A new assessment may be required following recent renovation.
• Broadband: Ofcom data is updated annually. Actual availability may have changed — verify with individual ISPs.
• Schools and Ofsted: Ofsted ratings are from the most recent published inspection and may not reflect current school performance.

Attribution and Licensing

All data is used under the Open Government Licence v3.0 unless otherwise stated. This licence permits copying, publishing, distributing, adapting, and exploiting the information commercially and non-commercially, subject to attribution. Attribution is displayed alongside each data section on a Property Passport and in provenance metadata accessible via data disclosure panels.

Full licence text: Open Government Licence v3.0

Coverage Limitations

Data coverage varies by source. We clearly indicate when data is unavailable or incomplete — empty sections mean no data exists at the source for that property.

• Great Britain only: Ordnance Survey open data covers England, Scotland, and Wales. Northern Ireland (LPS UPRN system) is not currently integrated.
• England only for: flood risk, planning constraints, heritage, IMD, schools, and Ofsted ratings.
• EPC: Only properties formally assessed (~20M records). Properties without a sale or renovation since 2007 may lack an EPC.
• Price Paid: Residential properties sold since 1995 only. Excludes commercial property and off-market transactions.
• Planning applications: Coverage depends on local planning authority participation in the national Planning Data Platform.

Data Quality and Corrections

We present data as received from source providers. We do not alter or enhance source data. If you believe data is incorrect, the correction should be made at the original source:

• EPC errors: Lodge or dispute an EPC (gov.uk)
• Price Paid errors: Contact HM Land Registry
• School information: DfE Get Information About Schools
• Heritage listings: Historic England National Heritage List
• Address errors: Ordnance Survey

Once corrected at source, our next scheduled sync will update the property record. For more information, see our disclaimers page.

Suggest a Data Source

We welcome suggestions for additional public data sources. Contact us at data@propertypassport.uk or via our contact form. We prioritise sources published by government or official bodies, available under open licences, updated regularly, and relevant to property purchase, ownership, or occupancy decisions.

Related Pages

• Methodology — How we build Property Passports
• Disclaimers — Important limitations and caveats
• Privacy Policy — How we protect your personal data