Sinkhole and subsidence screening
Live geology, soil, tree and BGS records for a UK postcode, with an explanation of each risk factor.
Ground screening
1Map: put the pin on the building
2Geology
3Soil
4Trees within 50 m
Site tree register
Add trees you know about, including in neighbouring gardens. Species sets the NHBC water demand and mature height. Unknown species are treated as high water demand.
| Species | Water demand | Height | Distance |
|---|
5Recorded features nearby
6About the building
Optional. Your answers stay in this browser and update the checks below.
7What to check first
How to read this report
Higher means the mapped data shows a recognised cause of ground movement at this location. Moderate means a contributing factor is present or the data is mixed. Lower means the factor is not indicated by the national data. None of these is a prediction that the property will move.
Geology is mapped at 1:625,000, so boundaries are approximate. A professional ground stability search uses more detailed data, including BGS GeoSure.
What you get
- Bedrock and superficial geology, with soluble rocks, clays and soft deposits explained
- Soil texture, subsoil, depth and peat from the BGS Soil Parent Material Model
- Mapped trees within 50 m (England), with heights, distances and NHBC zones of influence
- BGS landslide records, borehole logs and historic mine plans nearby
- A priority list of checks based on the data and what you tell us about the building
Try an example
HG4 1AA, Ripon: Permian rocks with gypsum, the UK’s best-known sinkhole area.
SE22 9DD, East Dulwich: clay soils and street trees in south London.
WN3 4HT, Wigan: coal-bearing rocks on the Lancashire coalfield.