dataset · United Kingdom

Property Subsidence Assessment dataset 2022

The BGS Property Subsidence Assessment (PSA) dataset provides insurers and homeowners access to a better understanding of the shrink-swell hazard at both the individual property and/or postcode level for England and Wales. It builds upon the GeoSure shrink-swell data by mapping the hazard to the individual building polygon and considering the other susceptibility factors of building type, foundation depth, and drainage and tree proximity. The user receives GIS building polygons with an overall s

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Source details

Licence: ["The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in an

Evidence quality: 38.4

Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

What's in it

Data offered docs-verified: building-polygon subsidence susceptibility score (1-100) · subsidence hazard classes (non-plastic to very high) · per-building factor scores (1-10) for geology, foundation, drainage, building type, building storey and tree proximity · postcode-level table of average PSA score for buildings in each postcode
Coverage docs-verified: England and Wales · 2022 (dataset reference date)
Resolution docs-verified: Individual building polygon (property level), generalised to postcode level
Update frequency docs-verified: Not planned (no scheduled updates)
Formats docs-verified: GIS building polygons (format not specified) · table (format not specified)
Access docs-verified: Restricted by copyright: materials derived from BGS work are vested in NERC; reproduction or redistribution requires prior permission from the copyright holder via the BGS Intellectual Property Rights Manager. Price and purchase terms are not stated in the docs.

Useful for

Use cases llm-inferred: Property-level shrink-swell screening of residential building stock for insurance or portfolio risk review · Postcode-level subsidence susceptibility context for ground-investigation scoping on housing sites · Identifying tree-proximity and drainage contributors to subsidence risk for remediation advice
Audience llm-inferred: geotechnical engineers · insurance risk analysts · GIS analysts · planners

Limitations

Constraints llm-inferred: Reference date is 2022 and no scheduled updates are planned, although the page shows a 2 October 2026 update date · Coverage is England and Wales only, though the catalogue region is tagged United Kingdom · Licence restricts reproduction and redistribution without BGS/NERC permission · NERC/BGS gives no warranty on accuracy or suitability and accepts no liability; use is at the customer's own risk · Hazard scores build on GeoSure and GIP source data, so they inherit the limits of those datasets

Evidence

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.