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What Should I Ask the Seller About Mold History?

Last updated October 26, 2026

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The short answer

Start with Direct Questions

Begin by asking the seller if they have ever seen mold in the home, and if so, where it was located. You want to know if mold is currently visible or if it was a past issue that has been addressed. Ask about any water leaks, floods, or high humidity problems that could have led to mold growth.

Follow up by asking what was done to fix the problem. Did they simply clean the surface, or did they remove and replace affected materials like drywall or flooring? The answer tells you whether the issue was fully resolved or just hidden. If they are vague or unsure, treat that as a red flag and plan to investigate further.

Request Documentation

Ask for any paperwork related to mold inspections, testing, or remediation. This could include reports from a mold professional, invoices for cleanup work, or receipts for materials replaced. Documentation shows that a real process was followed rather than a quick fix.

If the seller cannot provide documentation, ask why. Sometimes homeowners handle small mold spots themselves and have no records, which is fine for a minor issue. But for significant mold or water damage, you want proof that the work was done properly and that the problem is not likely to return.

  • Ask for inspection reports and lab results
  • Request invoices or receipts for remediation work
  • Ask for photos of the mold and the repair process
  • Get a list of materials that were removed and replaced
  • Ask for any warranties on the remediation work
  • Request the name of the mold professional who did the work

Probe the Water Damage History

Mold almost always follows water damage, so ask about every leak, flood, or spill the seller can remember. This includes roof leaks, burst pipes, appliance overflows, and even condensation issues. Each event is a potential source of hidden mold.

Ask how long the water sat before it was cleaned up and what drying methods were used. Quick drying within a day or two reduces mold risk, while prolonged dampness can allow mold to take hold. If the seller is unsure about the timeline, assume the worst and plan for a thorough inspection.

Check the Home Inspection Report

Ask if the home inspection report mentions any signs of mold, moisture, or water damage. Inspectors often note visible mold, musty odors, or stains that could indicate a problem. The seller should share this report with you, and you can use it to guide your own questions.

If the report flags any issues, ask the seller directly about those findings. For example, if the inspector noted a stain on the ceiling, ask what caused it and whether it was repaired. Do not accept a vague answer like "it was fixed" without details on what was done.

Ask About the Age and Condition of Key Systems

Ask about the age of the roof, HVAC system, and water heater, since these are common sources of leaks that lead to mold. An older roof or AC unit is more likely to have had leaks in the past, even if they were repaired. Ask about any maintenance or repairs done on these systems.

Also ask about the condition of the plumbing, especially if the home is older. Ask if any pipes have burst or leaked, and whether the seller has had the plumbing inspected. If you live in St. Petersburg, the humid climate makes moisture issues more likely, so be thorough with these questions.

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Frequently asked questions

What if the seller says there is no mold history?

That may be true, but it is not a certainty. Ask if they ever had water damage or leaks, since mold can grow without being noticed. Plan to have a mold inspection done before closing, especially if you smell musty odors or see stains.

Should I ask about mold in the attic or crawlspace?

Yes, ask specifically about these hidden areas. Mold often grows in attics due to poor ventilation and in crawlspaces due to ground moisture. Ask the seller if they have ever checked these spaces and what they found.

Can I ask the seller to pay for a mold inspection?

You can ask, but the seller is not required to agree. It is common for buyers to request a mold inspection as part of the home inspection contingency. The cost depends on the size of the home, the extent of testing, and the specific mold professional you choose.

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