Pennsylvania requires sellers to disclose known defects in writing, regulates home inspectors through a trade-practice law rather than a state license, and sits almost entirely in the EPA's highest radon zone. This guide covers the disclosure law, how inspectors are regulated, the regional hazards — radon, old housing stock, mine subsidence, freeze-thaw — and what an inspection costs.

Pennsylvania's Real Estate Seller Disclosure Law

Pennsylvania's Real Estate Seller Disclosure Law (68 Pa.C.S. §§ 7301–7315) requires sellers of residential property with up to four dwelling units to complete a written Property Disclosure Statement and deliver it to the buyer before the agreement of sale is signed. The standard form is promulgated by the State Real Estate Commission, and sellers may use forms with additional provisions.

The legal standard is the material defect: a problem that would significantly affect the property's value or pose an unreasonable risk to people on the property. The statement covers water and sewage systems, roof condition, heating, cooling, and electrical systems, structural and foundation issues, pest infestations and past damage, hazardous substances (mold, radon, lead paint), and legal issues such as boundary disputes or zoning violations.

Key points buyers should understand:

  • Sellers must disclose what they know. They are not required to investigate or hire inspectors to complete the form — but they may not make statements they know (or have reason to know) are false, deceptive, or misleading, and they may not conceal known defects.
  • If the seller does not know the answer, "unknown" is an acceptable answer. Do not read "unknown" as "fine" — read it as a question for your inspector.
  • The fact that a system is at or past the end of its normal useful life is not, by itself, a material defect under the law's definition.
  • A seller who willfully or negligently violates the law is liable for the buyer's actual damages, and buyers have up to two years from closing to bring a claim.
  • There are statutory exceptions where no disclosure statement is required (for example, certain transfers between co-owners or by court order) — if you receive no form at all, ask why.

Inspectors: no state license, but real statutory requirements

Pennsylvania does not issue a state home-inspector license. Instead, the profession is regulated under the state's Home Inspection Law (Act 114 of 2000), with oversight from the Attorney General's office. "No license" does not mean "no rules" — the statute sets specific requirements to practice legally:

  • Full membership in a qualifying national home-inspection association — nonprofit, members in more than ten states, requiring at least 100 inspections and a recognized exam.
  • A recognized examination — in practice, the National Home Inspector Examination (NHIE).
  • Insurance, both kinds, by statute: errors-and-omissions and general liability of at least $100,000 per occurrence and $500,000 aggregate, deductibles capped at $2,500.
  • Philadelphia requires its own municipal home-inspector license — the only Pennsylvania municipality with one. Buying in the city? Confirm your inspector holds it.

When hiring, ask for proof of association membership in good standing, proof of both insurance policies, and a sample report.

Hazard 1: radon — test every home, no exceptions

Pennsylvania is radon country. The vast majority of the state's counties sit in EPA Radon Zone 1, meaning the predicted average indoor screening level exceeds 4 picocuries per liter (pCi/L) — the EPA's action level. State-collected test data routinely shows averages well above that in many counties, with some areas averaging 10 pCi/L or more. Radon is the second leading cause of lung cancer in the United States, and it is odorless and invisible: the only way to know a home's level is to test that home, because levels vary dramatically house to house.

Radon testing is standard practice in Pennsylvania transactions. A short-term test run during the inspection period typically costs $150 to $250. If levels come back elevated, a sub-slab depressurization mitigation system typically costs $800 to $2,000 — a normal, negotiable item, not a deal-killer.

Note that Pennsylvania's disclosure form asks about hazardous substances including radon, so compare the seller's answers against your own test results. If the home already has a mitigation system, check that the fan is running and the manometer shows suction.

Hazard 2: old housing stock and freeze-thaw foundations

Pennsylvania has one of the oldest housing stocks in the country — stone farmhouses, early-1900s brick rowhouses, postwar Cape Cods, and 1970s split-levels are all everyday inventory. Old does not mean bad, but it means your inspector should be fluent in the failure modes of each era:

  • Stone and rubble foundations (pre-1900 homes): look for mortar deterioration, bowing walls, and water entry at the wall-floor joint.
  • Freeze-thaw cycling: water enters small cracks and expands when it freezes. Check masonry, chimneys, and foundation parging for spalling and displacement.
  • Aging systems: knob-and-tube or early Romex wiring, galvanized supply plumbing, cast-iron drains, and 40-year-old furnaces all show up regularly. Each has a remaining-life question your inspector should answer plainly.
  • Lead paint: assumed present in pre-1978 homes until tested otherwise; federal disclosure rules apply.

Hazard 3: abandoned mine subsidence in western Pennsylvania

Parts of western Pennsylvania — including the Pittsburgh region and surrounding counties — sit over abandoned underground coal mines. Mine subsidence (the ground settling as old mine voids collapse) can damage foundations, and it is specifically not covered by standard homeowners insurance.

What to do about it:

  • Check whether the property lies over or near mapped abandoned mines. The Pennsylvania Department of Environmental Protection's Bureau of Abandoned Mine Reclamation maintains mine maps and records buyers can consult.
  • Ask the seller and the inspector about any history of subsidence, cracking patterns consistent with settlement, or prior mine-related claims.
  • Consider mine subsidence insurance, which Pennsylvania makes available through a state-administered program at modest cost. In undermined areas, many buyers treat it as essential rather than optional.

Even outside the coal regions, ask about fill, slope stability, or past landslip issues — Pittsburgh's hillsides have their own slide history.

Hazard 4: water, basements, and winter

Pennsylvania basements are expected to be dry, but many are not. High water tables, clay soils, and aging exterior waterproofing make seepage one of the most common inspection findings. Look for efflorescence, staining, sump pumps with battery backups, and interior drain systems — and ask whether the basement has ever taken water, then verify after a rain if you can.

Winter-specific checks: ice dams on roofs with poor attic insulation or ventilation, frozen supply lines in unconditioned spaces, and grading that directs spring melt toward the foundation.

What a Pennsylvania home inspection typically costs

For a standard single-family home in Pennsylvania, expect roughly $350 to $500 for the general inspection, with Philadelphia-area pricing running toward the higher end. Larger homes, older homes, and multi-unit properties cost more; rowhouse and twin inspections in the Philly market often price by unit count.

Budget for the add-ons that are close to standard practice in the state:

  • Radon testing: $150 to $250 — treat this as part of the base budget in Pennsylvania, not an optional extra.
  • Wood-destroying insect inspection: typically $75 to $150; required by VA and many other lenders.
  • Sewer lateral scope: $150 to $300 — worthwhile on older homes with clay or cast-iron laterals and mature street trees.
  • Radon mitigation (if the test comes back high): $800 to $2,000, usually negotiated with the seller.

Confirm what the quote includes: square footage limits, outbuildings, and whether radon is tested with canisters or a continuous monitor, since continuous monitors give faster, tamper-evident results during a contingency window.

What this guide does not cover — and when to call a specialist

A general home inspection is a visual, non-invasive examination of accessible systems — not a code inspection, not a warranty, and not an engineering analysis. In Pennsylvania, bring in a structural engineer for foundation movement, a qualified radon mitigator for elevated test results, and a pest professional for the wood-destroying insect report. Septic systems and wells need their own dedicated inspections. This guide is general information, not legal advice: if the disclosure statement looks incomplete or conflicts with your inspector's findings, consult a Pennsylvania real estate attorney — you have up to two years from closing to bring a disclosure claim, but your leverage is strongest before settlement.

Frequently asked questions

Is a home inspection required to buy a house in Pennsylvania?

No. But the standard agreement of sale includes an inspection contingency with a negotiated deadline, and waiving it means accepting the property with only the seller's disclosures — which the seller is not required to investigate — to protect you.

Should I really test for radon even if the seller says levels are fine?

Yes. Test the specific house you are buying — radon varies enormously between neighboring homes. In a Zone 1 state, a $150–$250 test during the inspection period is one of the highest-value dollars in the transaction.

What does the seller have to tell me about the house?

Known material defects — problems that would significantly affect the property's value or pose an unreasonable risk to people — disclosed in writing before you sign the agreement of sale. They do not have to go looking for problems, but they cannot lie about or conceal the ones they know about.

Do I need mine subsidence insurance?

If you are buying in western Pennsylvania's coal regions, seriously consider it. Standard homeowners policies exclude mine subsidence, and the state-administered coverage is inexpensive relative to the risk. Check DEP mine maps for the specific property during your contingency period.

Can I attend the inspection?

Yes, and you should. Walking the house with the inspector teaches you where the shutoffs are and which findings are routine maintenance versus real concerns — context a written report alone cannot fully deliver.