Property Subsidence Hazard Scores For Buildings In England And Wales

A 2022 dataset from the British Geological Survey maps shrink-swell subsidence hazard to individual building polygons in England and Wales. It provides an overall susceptibility score (1-100) and factor-specific scores (1-10) for geology, foundation, drainage, building type, storey height, and tree proximity.

Use Cases

• Train a regression model to predict the overall building susceptibility score using the six factor-specific scores (geology, foundation, drainage, building type, building storey, tree proximity).
• Analyze correlations between tree proximity scores and foundation depth factors to identify high-risk property clusters.
• Aggregate building-level scores to postcode-level averages for regional risk assessment and insurance portfolio analysis.
• Compare geology-based hazard scores with building type and storey height scores to assess structural vulnerability interactions.

Strengths

• Provides hazard assessment at both individual building polygon and postcode aggregation levels.
• Includes six specific susceptibility factor scores (1-10) alongside a composite risk score (1-100).
• Enhances national geological data with property-specific factors like foundation depth and tree proximity.

Limitations

• Spatial coverage is limited to England and Wales, excluding Scotland and Northern Ireland.
• Data currency is from 2022, and ground conditions or building stock may have changed since.
• Methodology for deriving scores from underlying factors is not detailed in the provided description.

Provenance

Source

British Geological Survey (BGS)

Collection Method

Builds upon GeoSure shrink-swell data, mapped to building polygons with added susceptibility factors.

Time Range

2022

Freshness

Last updated record indicates 2026, but the core dataset is from 2022.

Geography

England and Wales