Mining and Ground Stability Searches

Subsidence is a serious issue for homebuyers, with clay soils alone implicated in £3bn insurance claims over the last 10 years. Claims are more common than for flooding incidents and it can leave an indelible mark on the ability to get affordable insurance in the future. Our changing climate is having locally dramatic effects on soil conditions including landslides, fissures or shrinkage that could leave your client's property on shaky ground.

We offer a range of products to allow an evaluation to be made for both residential and commercial properties.


Product Name Provider Summary Suitable for
Coal Authority Con29M Coal Authority The original Con29 coal report provides information source from the Coal Authority’s own records on past, present and future coal mining activities for any individual property or site in Britain. Residential or commercial property transactions
Groundsure CON29M Groundsure The residential report answers all of the official 11 questions requested in Law Society Guidance Notes (2018) and has additional information should the property fall within the Cheshire Brine Compensation area and offers extra peace of mind, protection and security via a comprehensive £100k Coal Search Report Insurance Policy. Authority’s own and has additional information should the property fall within the Cheshire Brine Compensation area Residential or commercial property transactions
Terrafirma Con29M Terrafirma The Terrafirma CON29M is a best of breed coal mining report that uniquely combines all Coal Authority data, Terrafirma’s expert knowledge of geohazards and advice from a panel of recognised industry professionals, to assess the risk to land and property in coal mining areas. Residential or commercial property transactions
Terrafirma Coal Extra Terrafirma
  • Official Coal Authority Data
  • Residential "CON29M-compliant" report (Past, Present & Planned extraction)
  • Additional Professional Interpretation
  • Alert of an additional 55 mining hazards
  • Past extraction
  • Present extraction; and also includes Cheshire Brine
Residential property transactions
Coalsearch + David Bellis Consulting Surveyors A comprehensive report from an independent surveyor backed by Search Code compliant insurance Residential or commercial property transactions
Cheshire Salt Groundsure The Cheshire Salt Search report is a Law Society requirement on subsidence risk due to brine extraction in Cheshire. Much of Cheshire is at increased risk of subsidence due to the presence of brine and previous mining practices, and the extent of this risk is not always identifiable by proximity to mines. In addition, previous compensation payouts mean that some properties are not eligible for compensation in the event of damage caused. The report provides information on how these matters affect a given property in Cheshire. It is necessary to obtain it before purchasing a property or conducting development work in the county. Residential or commercial property transactions
PlanVal Coal Planval A PlanVal Coal Mining Search accurately identifies Mining Risk areas using individual characteristics and attributes combined with official data from The Coal Authority and independent data drawn from 39 years of independent mining assessments and inspections. Our unique data and professional opinion includes the types of mining and/or quarrying and the depth, area and extent of the potential risk. Residential or commercial property transactions
PlanVal Non-Coal Planval A PlanVal Non-Coal Mining Searches accurately identify Mining Risk areas using individual characteristics and attributes of 64 mineral types combined independent data drawn from 39 years of independent mining assessments and inspections. Our unique data and professional opinion includes the types of mining and/or quarrying and the depth, area and extent of the potential risk. Residential property transactions
Terrafirma Ground Terrafirma A single search that comprehensively assesses the risk to a site (property and land) from all 60 mining hazards including:

  • Past extraction
  • Present extraction
  • Planned extraction
  • Official Coal Authority Data Residential "CON29M-compliant" report
  • Additional Professional Interpretation
Residential and commercial property transactions
Mining Interpretive Report Coal Authority A follow up report when a mine entry is disclosed in a report. This report will provide more detailed analysis and advice about the mine entries including a risk assessment as to whether the property is inside or outside the possible zone of ground movement from any reported mine entry. Residential and commercial property transactions
Homecheck Professional Ground Stability Landmark Covers all types of mining and other ground stability issues. It highlights the potential risks and identifies any need to engage a surveyor or structural engineer on specific issues Residential property transactions
Groundsure Ground Stability Groundsure A comprehensive view of natural and man-made mining activity, together with surface geology that could highlight the risk of subsidence. Residential property transactions
Metalliferous Mining Cornwall Consultants A specialist report for properties in Cornwall, Devon and Somerset where tin, copper, lead, silver and iron mining was widespread for over 3000 years. Residential and commercial property transactions
Bath Stone & Fullers Earth Cornwall Consultants A specialist report for or properties in areas of Bath, northeast Somerset and west Wiltshire where localised extraction of these deposits has been carried out since Roman times and remains active today Residential and commercial property transactions
Clay Search Various A report on the effects of China Clay mining in the Cornwall and Devon area or Ball Clay mining in the Devon and Dorset area Residential and commercial property transactions
Gypsum British Gypsum Advice on any gypsum mining works in the vicinity of the property/site. Residential and commercial property transactions
Radon Risk UK Radon Postcode search to determine if the property is in a radon affected area. Residential property transactions and small commercial properties
Radon Advisory British Geological Survey A search to determine if the property is in a radon affected area. Larger commercial properties or sites
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