Data catalogue/ Environmental risk/ Coal mining risk
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_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
}
}
]
}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.
| Field | Type | What it is |
|---|---|---|
| risk_type | string | Always "coal_mining" |
| label | string | "High" (Development High Risk) or "Medium" (Reporting Area) |
| score | null | Not applicable |
| intersects | boolean | True, property is within a Coal Authority constraint zone |
| distance_m | integer | 0, point query at property location |
| search_radius_m | integer | 0, no radius, exact location |
| properties.in_high_risk_area | boolean | True if in Development High Risk Area |
| properties.in_reporting_area | boolean | True if in Coal Mining Reporting Area (may also be high risk) |
| properties.description | string | Guidance text: "report required" or "report recommended" |
Affected areas
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.
The API
API example
- GET /risks/coal_mining/?uprn= cURL
- Response: High risk property 200 OK
- Properties outside coal mining areas return {"results": []} , an empty array, not an error.
curl "https://api.homedata.co.uk/risks/coal_mining/?uprn=100050374842" \ -H "Authorization: Api-Key YOUR_KEY"
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