Do I Need a Coal Mining Search When Buying a House?

When a coal mining search is needed

A coal mining search, known as a CON29M, is only relevant where coal has been mined in the past. The Coal Authority maintains the official record of these former coalfields and defines which postcodes fall inside a reporting area.

Around a quarter of properties in England and Wales sit within a Coal Authority reporting area, with concentrations across South Wales, the Midlands, Yorkshire, the North East and parts of Scotland. If a property is inside one of these areas, your conveyancer will order the search and your lender will expect it.

What the search reveals

• Past, present and proposed underground coal mining beneath or near the property.
• Mine entries such as shafts and adits within a defined radius.
• Recorded coal mining subsidence damage and any claims.
• Whether the property is in an area at risk of surface instability.
• Gas emissions and mine water that could affect the land.

Why it matters for your purchase

Historic mine workings can cause subsidence that damages the structure and is expensive to repair or stabilise. A shaft close to the building can also affect insurability and future resale.

If the search flags a concern, your conveyancer may recommend a more detailed mining report or specialist stability assessment before you proceed. A lender may hold back funds until any risk is understood.

Check coalfield risk before you commit

You do not need to wait for the full conveyancing pack to find out whether mining is a factor. A free HomeBuyerCheck report screens for coal and ground-stability risk so you know early whether a property sits in a sensitive area.

The £4.99 Premium tier adds more detail, letting you triage a shortlist before you make an offer or pay £250 to £450 for the full searches. If coal risk is a deal-breaker for you, it is far cheaper to find out at this stage.