Sources
Data sources & attribution
Nook is built on UK government open data. We're required to acknowledge each source by the terms of its licence — and we're glad to. Without this data the platform wouldn't exist.
UK Government data — Open Government Licence v3.0
The following sources are published under the UK Open Government Licence v3.0 (OGL). Each entry below names the dataset and its required attribution.
HM Land Registry
Used for: Sold prices, INSPIRE plot boundaries, registered title polygons.
Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
www.gov.uk/government/organisations/land-registry →Energy Performance Certificates
Used for: EPC ratings, floor area, heating type, energy cost estimates.
Contains public sector information licensed under the Open Government Licence v3.0. Source: epc.opendatacommunities.org, Department for Levelling Up, Housing and Communities.
epc.opendatacommunities.org →Environment Agency
Used for: Flood risk from rivers and sea, surface water flood risk.
Contains Environment Agency information © Environment Agency and database right 2026. Licensed under the Open Government Licence v3.0.
environment.data.gov.uk →Ofsted
Used for: School and nursery inspection ratings, inspection history.
Contains Ofsted data licensed under the Open Government Licence v3.0.
www.gov.uk/government/organisations/ofsted →Ofcom
Used for: Broadband coverage, mobile coverage by network.
Contains Ofcom data licensed under the Open Government Licence v3.0.
www.ofcom.org.uk →Civil Aviation Authority
Used for: Airport noise contours and overflight corridors.
Contains Civil Aviation Authority data licensed under the Open Government Licence v3.0.
www.caa.co.uk →Police.uk
Used for: Crime data by area, anti-social behaviour reports.
Powered by data.police.uk. Contains public sector information licensed under the Open Government Licence v3.0.
data.police.uk →Department for Education
Used for: Key Stage 2 and Key Stage 4 results, school directory.
Contains Department for Education data licensed under the Open Government Licence v3.0.
www.gov.uk/government/organisations/department-for-education →Office for National Statistics + Ordnance Survey
Used for: UPRN to postcode mapping (NSUL), Indices of Multiple Deprivation.
Contains National Statistics data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026.
geoportal.statistics.gov.uk →Ordnance Survey — Open UPRN
Used for: UPRN to latitude/longitude lookup.
Contains OS data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
www.ordnancesurvey.co.uk/products/os-open-uprn →Valuation Office Agency
Used for: Council tax bands and council tax rates by local authority.
Contains Valuation Office Agency data licensed under the Open Government Licence v3.0.
www.gov.uk/government/organisations/valuation-office-agency →Mining Remediation Authority
Used for: Coalfield Consultation Areas and coal mining risk indicators.
Contains Mining Remediation Authority data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
www.gov.uk/government/organisations/mining-remediation-authority →UK Government data — other open licences
British Geological Survey & UK Health Security Agency
Used for: Radon potential atlas — the per-grid-cell risk classification.
Indicative Atlas of Radon in England © UKHSA and BGS, used by permission.
www.ukradon.org →Commercial sources
These sources are not government open data. They're used under their own licence terms.
Mapbox
Used for: Map tiles, geocoding, building outlines, satellite imagery.
© Mapbox © OpenStreetMap contributors.
www.mapbox.com →OpenStreetMap
Used for: Map base layer (via Mapbox composite source).
Map data © OpenStreetMap contributors, available under the Open Database Licence (ODbL).
www.openstreetmap.org →Zoopla
Used for: Estimated market value, listing photos and floorplans for past sales, sold history augmentation.
Source: Zoopla. We display the Zoopla AVM and listing data with attribution and a link back to the original Zoopla page on every property report.
www.zoopla.co.uk →Anthropic Claude
Used for: AI-generated property summaries (the "What stands out" bullets at the top of each report).
Summaries generated by Anthropic Claude. The AI is a tool; the property data underneath comes from the government sources above.
www.anthropic.com →Updates and corrections
If you spot something we're using incorrectly, an attribution that's missing or wrong, or a dataset we should be citing differently, email hello@nookuk.com and we'll fix it.