Coal Mining Area Check UK 2026: Should You Worry, How to Check, What It Means for Mortgage and Insurance

Roughly 42% of English homes sit on former coal mining notification areas, mostly in the Midlands, North East, North West, Yorkshire, South Wales and Central Scotland. Here's how to check the address you're buying, when to worry, and how to factor it into your offer.

The two real coal-mining risks

1. Subsidence (rare, but expensive)

Underground voids left by historic mining can collapse, causing surface subsidence. The Coal Authority funds remedial work for properties damaged by past mining (you don't pay for the fix). Insurance still pays out for emergency repairs and disruption; the Coal Authority reimburses the insurer. Subsidence-claim history stays on the property record permanently and affects insurance pricing.

2. Shaft proximity

Around 174,000 historic mine entries are recorded across the UK. Properties built within 20 metres of a shaft have residual void risk. Shafts are usually capped, but caps can degrade over decades. Any deep works (basements, swimming pools, deep foundations) on a coal mining-area property require Coal Authority permission.

Coal Authority notification areas

A property in a Coal Authority notification area means historic coal-mining records exist for the area, and the seller is required to disclose it. Roughly 42% of English homes fall into this category — this isn't a small or unusual category. Concentration is heaviest in:

• South Yorkshire, West Yorkshire, North East
• Nottinghamshire, Derbyshire, North Staffordshire
• Lancashire, Greater Manchester
• South Wales coalfield
• Central Scotland (Lanarkshire, Fife, Ayrshire)
• Kent (small Kent coalfield)

How to check (free)

1. Go to gov.uk/check-if-property-is-affected-by-coal-mining
2. Enter the postcode
3. The map shows whether the address is in a notification area (yellow/red) or not
4. If yes, the property is on the Coal Authority register; the seller must disclose

The free check tells you the binary "yes/no" but doesn't tell you the specific risk grade for your address, the historical mining records, or what your solicitor will need to commission.

What the £4.99 Premium report adds

• Coal Authority coal mining reporting area for the exact address (in or out), so you know whether a CON29M is likely to be needed
• Non-coal mining and the British Geological Survey ground stability bands (shrink-swell clay, landslide, soluble rocks and more)
• Radon affected area band
• Plus: listed building and conservation area status, company ownership, high-rise building register status and property tribunal history
• Online report link to share with your partner or mortgage adviser, plus a PDF download

The £3.99 Buyer Address Report gives a regional estimate of coal mining risk rather than this Coal Authority lookup, alongside flood, price projections, planning and the crime trend.

Do you need a Coal Authority CON29M Mining Report?

Your solicitor commissions this at exchange in any coal-mining notification area — you don't usually order it yourself. It costs £3-£60 (paid as part of the conveyancing fees). It contains the formal Coal Authority verdict on whether the property has past, current or future mining issues, plus legal indemnity wording your lender requires.

The CON29M is a separate document from the £60-120 environmental search (Groundsure or Landmark). Both are usually bundled in the £250-450 conveyancing pack at exchange.

When to walk away

• The CON29M reveals an active subsidence claim or shaft within 5 metres of the property
• The seller can't produce previous CON29Ms or refuses to disclose mining history
• Your insurer refuses to quote or quotes £1,500+ /year
• The property has subsidence claim history within the last 10 years (still insurable but at a premium)

When it's fine

Most cases. The mines closed decades or centuries ago, the ground has settled, the Coal Authority has recorded the area as monitored. A clean CON29M plus standard insurance quote means you're looking at a completely normal house with a piece of historical paperwork attached.