Coal Mining Risk
Coal mining subsidence risk from the Coal Authority's national planning constraints dataset. Identifies whether a property sits within a Development High Risk Area (report required) or Coal Mining Reporting Area (report recommended). Properties outside coal mining areas return no result.
Risk classification
The Coal Authority defines two constraint zones. Only properties within these zones get a result — an empty results array means the property is outside all coal mining areas.
Property is in an area with a history of coal extraction. Coal mining report required for planning applications. Mortgage lenders may require a completed report before lending.
Property is in the broader reporting area — coal mining history is present in the region. Report recommended, particularly for new-build or recently extended properties.
No result returned. The property is outside both the Development High Risk Area and the Coal Mining Reporting Area. No coal mining report required.
Response fields
Only returned when the property is in a coal mining constraint zone. Empty results = no coal mining risk — not an error.
Coal mining areas include: South Wales, Yorkshire, County Durham, Northumberland, Nottinghamshire, Derbyshire, South Staffordshire, parts of Scotland. Over 800,000 properties in England and Wales are in a reporting area.
Built for
Conveyancing tools
Coal mining searches are required for transactions in affected areas. Pre-screen at address input stage — only order the full search when the API says one is required.
Mortgage lending
Many lenders require a completed coal mining report before approving a mortgage in High Risk Areas. Identify these properties in the application pipeline before instructing valuers.
Planning & development
Development in High Risk Areas may require additional structural surveys. Screen sites during early feasibility to flag potential additional costs before committing to acquisition.
API example
curl "https://api.homedata.co.uk/api/risks/coal_mining/?uprn=100050374842" \ -H "Authorization: Api-Key YOUR_KEY"
{
"risk_type": "coal_mining",
"uprn": 100050374842,
"results": [
{
"risk_type": "coal_mining",
"label": "High",
"score": null,
"intersects": true,
"distance_m": 0,
"search_radius_m": 0,
"count": 1,
"radius_description": "At property",
"properties": {
"description": "In development high risk
area - coal mining report required",
"in_high_risk_area": true,
"in_reporting_area": true
}
}
]
}
Properties outside coal mining areas return {"results": []} — an empty array, not an error.