Subsidence Search

What is Subsidence?

Subsidence is the vertical downward movement of a building foundation caused by the loss of support of the ground beneath the foundations. This is usually associated with changes in the sub soil supporting the foundations, for example:


  • Shrinkage or softening of clay soils

  • Washing away fines (loose granular material)

  • Compression of peat, other than that directly due to the self-weight of the building

  • Further compaction or consolidation of the ground






Every year an estimated £175 million¹ is spent on subsidence claims, rising during drier periods. It is worth noting that the UK has recently recorded one of its driest springs for over 100 years ².

Subsidence Search*

The subsidence search provides a subsidence risk assessment for a property with the level of risk calculated from a database of actual UK subsidence incidents using full postcode matching.



The risk assessment and certification service is certified by SPPS ** (Consulting Civil & Structural Engineers and Chartered Building Surveyors with a specialism in subsidence) and the Landmark Information Group.



The level of risk is calculated and presented on the following criteria:



  • Low – Fewer cases of clay shrinkage or drainage related subsidence are predicted in this area compared to the average number for the UK as a whole

  • Medium – Predicted risk is over 1 and up to 2 times the average for the UK for clay shrinkage or drainage related subsidence

  • High – Predicated risk is over 2 and up to 4 times the average for the UK for clay shrinkage or drainage related subsidence

  • Very High – Predicted risk is over 4 times the average for the UK for clay shrinkage or drainage related subsidence


The cost of this invaluable insight is £15.00 + VAT per report (£18.00)



This product is available with 10% discount, click here for further details.


Severn Trent Searches also offers an extensive range of Environmental searches


Sources: ¹Association of British Insurers (ABI) figures for the 2009, ²Met Office (1 June 2011)
*Arranged by Severn Trent Searches, provided by Property Assure in partnership with Landmark Information Group.
**SPPS (Smithers Purslow Property Services)

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