Short answer
Yes, you can sell a house with mold. If you know about it and it is a material defect, you must disclose it on the Pennsylvania seller disclosure statement, and you cannot hide or misstate it. You do not have to test for it. Fixing the moisture source and cleaning it up first can help a listing sale.
Disclosure is about what you know
Pennsylvania's Seller Disclosure Law requires you to disclose known material defects by completing the property disclosure statement before the agreement of sale is signed. The statutory list of subjects includes basements and crawl spaces, water and sewage systems, plumbing, and presence of hazardous substances. The text we reviewed does not use the word mold, so check how the current state form words its questions, and answer the water and basement items honestly.
If you have seen mold, had it tested or paid for remediation, say so. Hiding it invites a damages claim.
No duty to investigate, but no false statements
The statute says the seller is not obligated to make a specific investigation or inquiry. You do not have to hire a tester. But you may not make representations you know, or have reason to know, are false, deceptive or misleading, and you may not fail to disclose a known material defect.
If a seller willfully or negligently violates these duties, the seller can be liable for the buyer's actual damages. A claim must be brought within two years after final settlement.
Fix the cause, not just the stain
Mold usually traces back to moisture: a roof or plumbing leak, poor drainage, a damp basement, or poor ventilation. Buyers and inspectors look for the source. Painting over a stain without fixing the water problem rarely helps and can look like concealment.
If you repair, keep invoices and any professional report. Disclose what was found and what was done. Documentation can reassure a buyer. This answer does not state cleanup costs or health thresholds, since we reviewed no sources for them.
If you cannot or will not fix it
You can list as-is with a price that reflects the problem, or sell as-is to a cash buyer. Buyers using a mortgage may find it harder to get through an inspection and appraisal when mold or water damage is present. Cash buyers do not have a lender's requirements, but they will price in remediation and the risk of what is behind the walls.
Be ready for a lower offer than a clean, dry house would bring. A listing with an agent may still net more if you can fix the cause and the house is otherwise in good condition.
Where Kaizen fits
Kaizen Home Buyers buys as-is, so you do not need to remediate. We make a cash offer within 24 hours, typically close in 14 to 30 days or on your date, and charge no agent commission. Tell us what you know about the mold and the water source when you call 267-329-0084, so the offer starts from the real condition.