Data sources

ViableSite builds on open and licensed data. This page lists every provider the product reads, what we use it for, the credit each licence asks for, and the licence itself.

Ordnance Survey (OS Places API, OS NGD Features API)

Address and UPRN lookup, building footprints, land-use sites, plot boundaries.

Contains OS data © Crown copyright and database right 2026.

Licence: OS Data Hub API terms and conditions

planning.data.gov.uk (Ministry of Housing, Communities and Local Government)

National planning constraint datasets.

Contains data from planning.data.gov.uk © Crown copyright and database right 2026.

Licence: Open Government Licence v3.0

Each dataset on planning.data.gov.uk carries its own licence and attribution on its dataset page; the platform's own data is OGL.

Greater London Authority Planning Data Map

London constraints, town centre boundaries, site allocations.

Contains Greater London Authority data. Contains OS data © Crown copyright and database right 2026.

Licence: Open Government Licence v3.0

Layers that reproduce Natural England, Historic England or Ordnance Survey data carry those bodies' copyright; the metadata page of each layer on gis.london.gov.uk states it.

Greater London Authority Planning London Datahub

London planning applications.

Contains Greater London Authority data from the Planning London Datahub. The Greater London Authority cannot warrant the quality or accuracy of the data.

Licence: London Datastore terms and conditions

The terms allow use of the data for any purpose within the terms and ask re-users to state the warranty sentence above (read on 2026-10-21).

Transport for London WebCAT (PTAL grid, self-hosted copy)

Public Transport Accessibility Level of a site.

Powered by TfL Open Data. Contains OS data © Crown copyright and database rights 2026 and Geomni UK Map data © and database rights 2026.

Licence: TfL open data terms

HM Land Registry UK House Price Index

Indexation of sales values to the current month.

Contains HM Land Registry data © Crown copyright and database right 2026.

Licence: Open Government Licence v3.0

House Price Per Square Metre in England and Wales, 1995-2024 (Chi, Dennett, Oléron-Evans and Morphet, UK Data Service ReShare 857911)

Sales value medians per square metre.

Chi, B., Dennett, A., Oléron-Evans, T. and Morphet, R. (2025). House Price Per Square Metre in England and Wales, 1995-2024. UK Data Service ReShare, DOI 10.5255/UKDA-SN-857911, CC BY 4.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains public sector information licensed under the Open Government Licence v3.0.

Licence: Creative Commons Attribution 4.0 International

Dataset record: https://reshare.ukdataservice.ac.uk/857911/ (the 1995-2024 release, which SalesValueService imports as chi-dennett-2024 and cites in its response). The Price Paid Data and the EPC data inside it are OGL.

Environment Agency LiDAR Composite DTM 1 m

Ground level spread inside a site, terrain context.

Licence: Open Government Licence v3.0

Environment Agency Historic Landfill Sites

Landfill within 250 m of a site.

Licence: Environment Agency Conditional Licence (renew by 2027-10-08)

Dataset record: https://environment.data.gov.uk/dataset/7a955570-d465-11e4-a37c-f0def148f590.

British Geological Survey Geology 50k

Bedrock, superficial deposits and artificial ground.

Contains British Geological Survey materials © UKRI 2026.

Licence: Open Government Licence v3.0

Historic England Greater London Archaeological Priority Areas

Archaeological priority tier of a London site.

Licence: Open Government Licence v3.0

Office for National Statistics Regions (December 2025) boundaries

Whether a site is in London.

Source: Office for National Statistics licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2025.

Licence: Open Government Licence v3.0

postcodes.io

Postcode to coordinates and local authority.

Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026.

Licence: Open Government Licence v3.0

The postcodes.io service is open source under the MIT licence, https://postcodes.io/about.

OpenStreetMap (Nominatim geocoding, Overpass tree data, map tiles)

Address search and geocoding, tree canopy in the 3D scene, the 2D base map.

Licence: Open Data Commons Open Database License (ODbL)

The services have their own usage policies: Nominatim https://operations.osmfoundation.org/policies/nominatim/, tiles https://operations.osmfoundation.org/policies/tiles/, Overpass https://overpass-api.de/ (the terms on the instance page).

UK PlanIt (planit.org.uk)

Planning application history around a site.

Planning application data from UK PlanIt, built by Andrew Speakman.

Licence: PlanIt FAQ terms

The FAQ says: "You can use the data from this site for anything you want. No attribution is necessary." PlanIt offers no commercial terms and no service guarantee.

Esri World Imagery and World Boundaries and Places tiles

Satellite base map and place labels on the 2D map.

Imagery and labels © Esri and its data contributors (Maxar, Earthstar Geographics, and the contributors Esri names for the area shown).

Licence: Esri master agreement

Esri serves the required credit for the area shown through its attribution endpoint; the map shows a fixed line.

Terrain Tiles on AWS Open Data (Mapzen Terrarium)

Elevation of the 3D scene.

Terrain Tiles from Mapzen and the AWS Open Data program. Europe terrain data produced using Copernicus data and information funded by the European Union (EU-DEM layers). Global GMTED2010 and SRTM terrain data courtesy of the U.S. Geological Survey.

Licence: Terrain Tiles attribution and source licences

Each source dataset has its own licence, listed with its required credit at that URL.