Selling a House in a Coal Mining Area: UK Guide 2026

By Lisa Hayes · 7 November 2026

Selling a house in a former coal mining area is perfectly possible, and most sales go through. Your buyer's conveyancer will order a coal mining report, and if it shows a mine entry close to the boundary, gas emissions or a subsidence history, you can keep the sale alive by getting ahead of it with evidence, a surveyor's view and, if the buyer's lender walks away, a cash buyer.

I hear from sellers every week who have just received a search result that reads like a horror story. A "mine entry within 20 metres". A "gas emission". A conveyancer using the word "unstable". Usually nothing is actually wrong with the house. But the paperwork has made a buyer, or their lender, nervous, and a nervous buyer reprices or disappears.

This guide walks through everything a buyer, a lender and a conveyancer will ask about coal mining, in the order you are likely to meet it. It is built around the Mining Remediation Authority (still widely called the Coal Authority, and you will see both names on paperwork), because that is the body whose data sits behind almost every coal mining search in Britain.

What is a coal mining report and why does my buyer need one?

A coal mining report is a search of the Mining Remediation Authority's records for a specific address. In conveyancing it is usually called a CON29M, a standard form set by the Law Society. GOV.UK describes what the report tells you: mine entries within 20 metres of the property's boundaries, gas emissions from coal mines, other coal mining hazards reported in the area, and plans for future coal mining.

On the same page GOV.UK says that a solicitor or conveyancer will usually do a coal mining search if you are buying land or property in an affected area. So you do not need to arrange one. Your buyer's conveyancer will, as part of the usual bundle alongside the local authority and drainage searches (the timings for those are covered here).

The trouble is the order of events. The search is normally ordered after an offer is accepted, so a problem emerges three or four weeks into a sale, once the buyer has paid for a survey and told their landlord or their own buyer they are moving. That is the moment people get cold feet.

Is a coal mining report compulsory?

Not by law, as far as the official sources I read go. In practice, though, if the property is in a coal mining reporting area, a mortgage lender will almost always expect it, and no sensible conveyancer will skip it. One industry article (written by a search provider in 2019, so treat it as vendor opinion) describes it as mandatory in coal mining areas and claims roughly a quarter of UK residential transactions need one. The honest summary: if you are in an affected area, assume it will be required.

How do I find out if my house is in a coal mining area?

Use the Mining Remediation Authority's free online search with your postcode and boundaries. It gives you a result straight away and tells you whether you need a report. If you do not know your postcode, GOV.UK points to an interactive map. Searching is free; the report is what you pay for.

How much does a coal mining report cost and how long does it take?

• £27+report price, plus VAT (GOV.UK)
• 24–48 hrsusual turnaround, up to 72
• 20 mmine-entry search distance from boundary
• 90 daysusual decision time on a subsidence claim

GOV.UK says prices start at £27 plus VAT, and that reports covering general subsidence, environmental or flood risk cost more. Reports typically arrive by email within 24 to 48 hours, though it can take up to 72. You can also order by phone on 0345 762 6848 (Monday to Friday, 8:45am to 5pm) if you have no internet access.

Conveyancing firms bundle the search into their own fees, so the figure on your buyer's bill may be higher than £27. That is the firm's pricing, not the authority's. I have not found an official figure for how long a report stays valid, so ask your conveyancer what their lender will accept rather than assuming a fixed period.

Should I order a coal mining report before I list?

Yes. This is the single most useful thing a seller in a coalfield area can do, and almost nobody does it.

Think about what you gain for around the price of a takeaway. You find out on day one rather than week four. You can read the report, decide how to present it, and put it in the legal pack your solicitor sends over with the contract. A buyer who sees a clear report at the start does not have a dramatic reveal later. A buyer who sees a report with a mine entry on it, alongside a calm explanation, is far less likely to run.

The counter-argument is that you will be handing over bad news voluntarily. But you cannot hide it. The buyer's conveyancer will order the search regardless, and under the rules on material information that sellers and agents now work to, you are expected to be upfront about known issues (see our guide on material information when selling). Better to control the story.

What does a "mine entry within 20 metres" actually mean?

A mine entry is a shaft or an adit (a horizontal tunnel) that once gave access to underground workings. The report flags any within 20 metres of the property's boundaries. It does not say the entry is dangerous, collapsing or even visible. Many were capped decades ago, and some records are vague on whether treatment took place.

The sensible next step is a closer look. A chartered surveyor or specialist can interpret the report, and where a mine entry is genuinely close to the building, a further investigation may be recommended. The same 2019 industry piece argues that entries within 20 metres should be investigated further. That is a vendor view, but it matches common sense: a flag on a map deserves a professional reading before you panic or dismiss it.

Two practical points. First, distance matters, but so does where the entry sits relative to the house itself rather than the boundary line. A shaft at the end of a long back garden is not the same as one by the extension. Second, if an entry is not sealed or you spot a hole or depression, report it. The authority runs a hazard line on 0800 288 4242, open 24 hours a day, every day. GOV.UK lists a collapsed mine or mine entrance, an unsealed abandoned mine entrance and a ground collapse (a sinkhole, for example) among the things to report.

Is coal mine gas a problem for selling a house?

The report tells you about gas emissions from coal mines, and GOV.UK's hazard page lists gas or water emissions from an abandoned mine as reportable. If your report mentions gas, your buyer will ask what it means for them, and their lender may ask for specialist advice.

Do not confuse this with radon, which is a natural gas from rock and soil and has its own testing regime. If you want that side covered too, read our guide to selling a house with radon. For mine gas, the first step is to read what the report actually says: a historical emission recorded in the area is a different thing from a measured, current issue at your address. Get that distinction in writing from someone qualified, not from a forum.

What is the difference between mining subsidence and ordinary subsidence?

Ordinary subsidence usually comes from clay shrinkage, leaking drains or trees. Mining subsidence comes from the ground moving above old underground workings. They can look identical on a wall: diagonal cracks, sticking doors, gaps by window frames. The cause decides who you speak to and who might pay.

GOV.UK's claim page says structural damage from coal mining "can start with cracked plaster and sticking doors", and covers ground collapse or other damage to your land as well. If you are not sure which type you have, a chartered surveyor can establish whether the damage is down to coal mining. For the wider picture on subsidence and how it hits sales, see our guide to selling a house with subsidence.

Can I claim for coal mining damage before I sell?

Yes, and in my opinion you should do it first. GOV.UK sets out three steps. First, find out whether the damage is due to coal mining (a chartered surveyor can do this). Second, fill in the damage notice form. Third, send it to the Mining Remediation Authority. Its public safety and subsidence helpline is 0345 762 6848.

After that, an engineer inspects the damage. If your claim is accepted, you get either the damage fixed or compensation. GOV.UK says you will usually get a decision within 90 days, and that surveyor fees may be compensated if the claim succeeds. I could not confirm a statutory time limit for lodging a claim from the pages I read, so check the damage notice form or ring the helpline before you assume you have plenty of time.

If you disagree with the decision, you can apply to CEDR for a review. For owners of domestic property the Householder Arbitration Scheme costs £96, according to GOV.UK.

Why claim before selling rather than after?

Because an open or unresolved claim muddies a sale. A buyer wants to know whether the house is repaired, whether compensation was paid, and who is responsible for what. A repaired house with a closed claim and a paper trail is a cleaner proposition than a cracked house with "we think it's mining". Timing is awkward, since 90 days is a long time if you are on a deadline, which is why the cash route below exists.

Will my buyer's mortgage lender refuse to lend?

Neither GOV.UK page covers lender policy, and I will not pretend there is one rule. Lenders vary, and a lender's valuer may react differently to a clean report, a mine entry near the boundary or a history of claims. What I can say from the shape of how sales fail is this: the problems usually arise when a valuer is spooked and either reduces the valuation or asks for further evidence that nobody has to hand.

That is the same mechanism as any down-valuation: the lender will only lend against what its valuer will stand behind. A short surveyor's letter that explains the mine entry, shows treatment records if they exist, and confirms no damage can turn a "refer" into an approval. If you have a closed claim with repairs done, include that too.

Does a coal mining report lower my asking price?

A clear report should not. A report with flagged items can, and I will not give you a percentage because I do not have a trustworthy published figure for it and I am not going to invent one. What I can tell you is how reductions happen. They happen when buyers have no information and assume the worst. Buyers price uncertainty heavily. Anything that removes uncertainty protects your price: the report itself, a surveyor's interpretation, treatment records, a closed claim, proof of repair. Get a realistic view of value first with our house valuation guide, and be wary of agents who value on the assumption the search will be clean.

What if a survey or the report finds a serious problem?

Then you have options, and the right one depends on how much time and money you have. Our wider guide on what happens if a survey finds problems covers renegotiation in detail. For mining specifically, there are four routes.

1. Investigate and fix. Commission the further investigation, claim if damage is mining-related, repair, then relist with the paperwork.
2. Reduce and sell as is. Offer a price that reflects the unknown and let the buyer take the risk. Works with cash-friendly buyers; hard with mortgage buyers.
3. Insurance. For some defects a legal indemnity policy can cover a risk, but it is not a cure for a physical problem. Read our indemnity insurance guide before assuming it applies.
4. Sell to a cash buyer. Skip the mortgage valuation entirely.

Is a cash buyer a good option for a house with a mining problem?

It can be, and I will be blunt about the trade-off. Cash buyers do not need a lender's valuer to sign off, so a mine entry or a subsidence history is a pricing question rather than a deal-breaker. That is why they exist for properties that mortgage lenders find awkward. The price is lower than a clean open-market sale, since the buyer is taking the risk, and some will try to knock more off after inspection. Compare several. Our guide to cash house buyers explains how to vet them, and if you want a broader list, see the best house buying companies comparison.

Speed is the other reason. A cash sale can be quick when the paperwork is straightforward, which suits you if you are carrying an empty property or waiting on a 90-day claim decision. If your home has been hard to place elsewhere, our page on selling an unsellable house sets out the realistic routes.

What should I tell buyers, and when?

Everything you know, early. The search will reveal what the records show, but you may know things the records do not: that the garden dipped a few years ago, that the chimney was repaired, that a neighbour had a claim. Hiding those is a mistake, and in some cases a legal one if it amounts to a misleading answer on the seller's property information form. Put it in plain English: what you know, what you have done, what paperwork exists. Do not speculate about cause. Say "a surveyor attributed the cracking to X" if that is true, and attach the report. If you do not know, say you do not know.

Documents worth having ready

• The coal mining report, with the date it was issued
• Any damage notice and the authority's decision letter
• Repair invoices and any guarantee
• A surveyor's letter interpreting the report
• Photos of the garden and boundary showing no ground movement, dated
• Records of any treatment of a nearby mine entry, if they exist

What if I think I have an unreported hazard?

Report it. The 24-hour line is 0800 288 4242. GOV.UK mentions call charges but does not say the line is free, so check before you ring from a mobile. Do not fill in a hole, do not let children play near it, and photograph it with something for scale. A reported and logged hazard is far better for your sale than an unreported one a buyer finds on a viewing.

Frequently asked scenarios

My neighbour had a mining claim. Does that affect my sale?

Not automatically. Your property's report is specific to your address and its boundaries. But a buyer may find out and ask, and the honest answer is to show your own evidence rather than speculate about next door.

I inherited a house in a former mining village. Where do I start?

Run the free search, then order the report if the search says you need one. If you are also dealing with probate, our inherited property page covers the order of events, and the report can be commissioned while you wait.

The house is a flat or a leasehold. Does the freeholder deal with this?

Possibly, if the issue is structural damage to the building, but responsibilities depend on your lease. Ask for the building's claims history from the managing agent. Do not assume the freeholder has handled anything.

A realistic timeline for selling in a coalfield area

• Free online search Day 1
• Coal mining report 1-3 days
• Surveyor interpretation 1-2 weeks
• Damage claim decision c. 90 days

The bars are illustrative of relative duration, built on the report turnaround and decision time GOV.UK states. The surveyor figure is my rough expectation, not a published number. If you need to move sooner than a claim will resolve, you are choosing between selling with the issue disclosed and selling to a cash buyer.

Five mistakes I see sellers make

1. Waiting for the buyer's search. You lose weeks and leverage.
2. Treating a flag as a verdict. A mine entry within 20 metres is a prompt to investigate, not proof of damage.
3. Skipping a surveyor. Reports are data. Someone has to read them.
4. Letting an agent reassure buyers verbally. If it is not in writing, a lender will not rely on it.
5. Selling cheap to the first cash offer. Get three or four. Our sell house fast page explains how comparison works and why the highest headline offer is not always the best.

So, what should you do this week?

Run the free search. If it says a report is needed, order one. Read it with a surveyor if anything is flagged. If there is damage, start the damage notice before you list. And if a mortgage sale looks fragile, line up a cash comparison in parallel rather than waiting to see whether the lender blinks.

When you are ready, compare offers through Ready Steady Sell. It takes a few minutes, costs nothing and commits you to nothing, and it gives you a figure to measure any other route against.

Sources: GOV.UK, "Find out if a property is affected by coal mining", "Claim for subsidence damage caused by coal mining" and "Report a coal mine hazard"; Mining Remediation Authority (formerly the Coal Authority). One industry article cited (Legal Futures, 2019) comes from a search provider and is vendor opinion. This guide is general information, not legal or surveying advice.