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Property Subsidence Assessment dataset 2023

Dataset title Property Subsidence Assessment dataset 2023
Dataset creators British Geological Survey
Dataset theme Geoscientific Information
Dataset abstract

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 susceptibility to subsidence score between 1-100. Scores are also classified from non-plastic to very high. Each building polygon is also scored from 1-10 for each subsidence factor (geology, foundation, drainage, building type, building storey and tree proximity).

Postcode data is also available as a table showing the 'average' PSA score for all buildings within the postcode.

The identification of shrink-swell related subsidence prone areas, alongside the inclusion of potential sources to exacerbate this phenomenon, can better inform insurers and homeowners and form the basis to make decisions concerning prevention and remediation. The product enhances geological information obtained from GIP and GeoSure via the inclusion of the crucial shrink-swell susceptibility factors (proximity to trees and foundation depth). This therefore allows the derivation of a risk element for the housing stock at Building level, which is then generalised to Postcode level.

Dataset content dates 2011 - 2023
Dataset spatial coverage England and Wales
Dataset supply format ESRI Shapefile, text document
Dataset language English-United Kingdom
Dataset discovery metadata record Discovery Link to the dataset's BGS Discovery Metadata record
Dataset publisher British Geological Survey
Dataset publication date October 2023
Dataset digital object identifier (DOI) 10.5285/ac452027-8bae-424c-94cc-3a6f5a88c842
Dataset citation text British Geological Survey. (2023). Property Subsidence Assessment dataset 2023. British Geological Survey. (Dataset). https://doi.org/10.5285/ac452027-8bae-424c-94cc-3a6f5a88c842
Constraints and terms of use This dataset is issued to third parties under BGS data licensing terms.
Access the dataset
Further information https://www.bgs.ac.uk/datasets/property-subsidence-assessment/