Do You Need Mine Subsidence Insurance When Buying a Home in Western PA?

If the house sits over or near a known underground mine, Pennsylvania's Department of Environmental Protection (DEP) recommends it. DEP says, "Damage due to mine subsidence or mine water breakouts are usually not covered by your homeowner's insurance policy." Its Mine Subsidence Insurance Risk Map shows whether an address falls in a gray "Underground Mining Area," where DEP says the insurance "is recommended," or a pink area where coal is known to exist but DEP lacks a record of whether it was mined, where coverage "is available if desired."

As of October 2026, DEP's program page says, "Residential coverage of $150,000 costs $41.25 a year," and "Coverage is available from $5,000 to $1,000,000." Those figures follow a 2021 change: DEP's draft Fiscal Year 2024 MSI Program Summary Report says the Coal and Clay Mine Subsidence Insurance Fund Board approved a recommendation "that premium rates be cut in half and that the coverage limit be increased from $500,000 to $1,000,000," effective July 1, 2021, and that "Premium rates and coverage limits have not changed since 2021." The Board's draft minutes from its January 15, 2025 meeting record "No change to the Policy Premium Rates" and state, "The maximum coverage amount remains $1,000,000." This post covers how to check an address, what the insurance covers and leaves out, what it costs, when buyers should apply, and what DEP says can be mistaken for subsidence.

Does Homeowners Insurance Cover Mine Subsidence in Pennsylvania?

Mine Subsidence Insurance (MSI) is a Pennsylvania program, offered through DEP, that "pays for losses from unanticipated earth movement related to abandoned underground mines." DEP says it "covers damage from the collapse of underground coal and clay mines in Pennsylvania."

The Pennsylvania Insurance Department says much the same in its guide to homeowners insurance: sinkholes and earth movement are "generally excluded from a homeowners insurance policy," and residents in affected communities "can purchase mine subsidence coverage through the State by calling 1-800-922-1678." Your insurer can confirm what your own policy excludes.

The program rests on the Act of August 23, 1961 (P.L. 1068, No. 484), 52 P.S. 3201 to 3225, which DEP says "established the Coal and Clay Mine Subsidence Insurance Fund, the Board, and the Program." Its regulations are at 25 Pa. Code Chapter 401. DEP's draft FY 2024 program report counts 62,426 policies in force at the end of fiscal year 2024, down from a peak of 63,508 at the end of fiscal year 2018.

How Can You Check Whether a Western PA House Sits Over an Old Mine?

Start with DEP's Mine Subsidence Insurance Risk Map, which searches by street address, latitude and longitude, or municipality. A gray result means the site is over or near a known mined area, and DEP says the owner is "at risk for mine subsidence or a mine water breakout." A pink result means mineable coal is known to exist, but DEP does not have a record of whether it was mined. The map carries a disclaimer: "The Department assumes no responsibility for the accuracy or completeness of this information."

Two more tools can add detail:

• Site-specific request. DEP's program page links an MSI Site-Specific Request Form for underground mining information at an address.

• Pennsylvania Mine Map Atlas. Penn State and DEP's atlas shows historic underground mine maps; zoom to the location and click to list the maps. The atlas describes them as maps "of various/unknown accuracy."

A resource extraction chapter of Allegheny Places, Allegheny County's comprehensive plan (an undated chapter posted with the draft plan), says: "Allegheny County, particularly south of the Allegheny and Ohio Rivers, has been extensively deep and surface mined." The plan says landowners in municipalities where subsurface mining has occurred should determine whether they need mine subsidence insurance, and it notes a DEP project in Plum Borough "that protected 193 homes from potential damage from abandoned mine subsidence."

Paperwork can flag it too. DEP's FY 2024 program report says "a notice of the potential for subsidence is contained in deeds that convey real property interests," and that other notices of mine subsidence and damage are required in real estate disclosure forms. For how local geology affects foundations, see how home inspectors identify foundation problems in Western PA homes.

What Does Mine Subsidence Insurance Cover, and What Does It Leave Out?

DEP's program page sets out the scope:

• Covered: "complete and under-construction buildings, appurtenances, and incidental losses," plus losses "from the movement of the ground due to a sudden and unexpected discharge of water" from a mine.

• Limited: appurtenances such as fences, retaining walls, patios, walks, driveways and in-ground pools. "Damage to appurtenances is limited to 10% of the coverage amount."

• Separate policy needed: a detached garage "would need its own policy."

• Not covered: contents. "MSI only covers damage to the building and its appurtenances."

• Not covered: "Mine Subsidence Insurance does not apply to sinkholes that occur as a result of limestone weathering."

Claims are paid on the actual cost to repair or replace, which DEP says "cannot exceed the value of the coverage, or the replacement cost of the structure, whichever is less." The Coal and Clay Mine Subsidence Insurance Fund Board's draft January 2025 minutes record that claim payment deductibles "would remain at $0."

How Much Does Mine Subsidence Insurance Cost in 2026?

As of October 2026, DEP's program page says, "Residential coverage of $150,000 costs $41.25 a year." It also says, "An average policy of $160,000 would cost just $43.75 a year or about $3.65 a month," and "Residential coverage costs about 27 cents for every $1,000 of coverage." For any other amount, use DEP's online premium calculator rather than scaling these examples.

A few rules shape what you buy and what you pay:

• Seniors. DEP lists a 10% discount for owners who are "65 or older by the premium due date." Its calculator says, "Senior premium rate applies only to the primary residence and outbuildings at the primary residence."

• How much to buy. DEP advises, "Your home should be insured up to its replacement value plus 20% to cover losses to appurtenances and incidental costs."

• Cap on increases. Coverage increases are limited to a "maximum $1,000,000 or the replacement value of the structure plus 20%," whichever is less.

For scale, DEP's draft FY 2024 report lists 212 claims filed in fiscal year 2024 and $1,617,684 paid.

When Should a Buyer Apply, and When Does Coverage Start?

DEP's answer: "You should apply when you have an agreement to purchase or when you make your mortgage application." DEP adds that coverage becomes effective at closing, as long as a required inspection does not identify damages that may need to be addressed.

Some houses need that inspection first. "Buildings located in an area with a record of past or recent problems will require an inspection before MSI can be purchased," DEP says, and "Structures with significant damage can be insured if the damages are first repaired."

For online applications through DEP GreenPort, "The policy effective date is the day it is submitted online, as long as payment is received within 60 days." After 60 days, DEP says coverage begins on the date payment is received, and "All applications are subject to review." Policies run one year: "Coverage is written for a term of one year and is renewable annually."

Does the Seller's Policy Transfer to the Buyer?

It does not. DEP's FAQ answers, "No, the new owners need to apply for their own policy," and it recommends that sellers cancel their policy on the day of the sale. DEP says the refund can run back to the closing date when MSI is told within 30 days. The buyer's own application is what creates coverage.

DEP says "a townhouse owner may apply for insurance at the residential rate," and condo owners may apply for coverage for their individual unit and associated common elements.

What Can Be Mistaken for Mine Subsidence?

DEP's FAQ lists "some common causes of structural damage which may be mistaken for mine subsidence": settlement under surface loads, landslides, soil shrinking and swelling, freezing and thawing, erosion, poor construction, and structural deterioration.

DEP's list is a reminder that a crack seen during a showing may have a cause other than an old mine. Background on how serious cracks found during a home inspection can be, whether buyers should be concerned about foundation cracks, and the foundation problems Pittsburgh inspectors find can help frame questions for the seller and agent.

For policyholders, DEP says, "To file a claim, you simply call 1-800-922-1678." As of October 2026, the claims line runs Monday through Friday, 8 a.m. to 4 p.m.

FAQ

How much is mine subsidence insurance in Pennsylvania?

As of October 2026, DEP says, "Residential coverage of $150,000 costs $41.25 a year," and "Residential coverage costs about 27 cents for every $1,000 of coverage." Coverage ranges from $5,000 to $1,000,000.

Does mine subsidence insurance cover sinkholes?

Not sinkholes from limestone weathering. DEP says MSI "does not apply to sinkholes that occur as a result of limestone weathering." It covers damage from the collapse of underground coal and clay mines in Pennsylvania.

Does MSI cover furniture and belongings?

No. DEP says, "MSI only covers damage to the building and its appurtenances."

Is a detached garage covered under the house's policy?

DEP says a detached garage would need its own policy.

Can you buy MSI on a house that already has damage?

DEP says structures with significant damage can be insured if the damages are first repaired. In areas with a record of past or recent problems, an inspection is required before MSI can be purchased.

What do the colors on DEP's risk map mean?

Gray marks an underground mining area, over or near a known mined area, where DEP recommends MSI. Pink marks known mineable coal with no DEP record of whether it was mined; there, DEP says MSI is available if desired.

Home Inspections for Western PA Buyers From First Class Home Inspections

First Class Home Inspections does not assess mine subsidence, and its report is not a subsidence diagnosis. Its Single Family Home Inspection covers the foundation, basement and crawlspaces, exterior, and porches and decks, which gives buyers a written record of the foundation conditions observed during the inspection. The company, an InterNACHI Certified Professional Inspector based in Pittsburgh, PA, serves Greater Pittsburgh and Allegheny, Washington, Fayette, Westmoreland, Indiana, Armstrong, Butler and Beaver Counties; see its home inspection services. For coverage questions, check DEP's risk map and call the MSI program.

Visit First Class Home Inspections or call (570) 660-9337 today. Contact us for more information.