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Mold Disclosure Laws: What Sellers and Landlords Must Tell You

Last updated October 25, 2026

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The short answer

What Sellers Must Disclose

When you buy a home, the seller usually fills out a disclosure form that lists known defects. Mold and past water damage are common items on that form. If the seller knows about a leak or visible mold, they must tell you in most states. Some states also require disclosure of prior flooding or sewage backups.

Even if the form does not ask about mold directly, a general question about water damage often covers it. Ask the seller directly in writing if they have ever seen mold or had a leak. Keep a copy of their answer. If they lie, you might have a claim later, but proving intent can be hard.

Bullet points to check on the disclosure form:

Any visible mold or mildew in the home

Past or current water leaks from roof, pipes, or appliances

Flooding in the basement or crawl space

Previous mold remediation or water damage repairs

Known issues with humidity or condensation

Any unresolved moisture problems

What Landlords Must Tell Renters

Landlords have a duty to keep rental properties habitable and safe. That includes addressing mold and water damage. In many states, landlords must disclose known mold problems before you sign a lease. Some cities and states have specific mold disclosure laws that require a written notice.

If you move in and find mold that was not disclosed, document it with photos and dates. Tell your landlord in writing and ask for remediation. If they fail to act, you may have the right to break the lease or withhold rent, but only under specific legal conditions.

Common landlord disclosure requirements:

Visible mold in the unit or common areas

History of water leaks or flooding in the building

Known roof or plumbing issues that could cause mold

Previous mold remediation and whether it was successful

Any standing water or dampness at move-in

Maintenance requests related to moisture that were unresolved

State and Local Variations

Mold disclosure laws are not uniform. Some states require explicit mold disclosure, while others only require general property condition reports. You need to check your state's real estate commission or landlord-tenant laws. Local ordinances in cities like Burnsville may add extra requirements.

If you live in Burnsville, review your purchase agreement or lease carefully. Look for any mention of mold, water damage, or prior flooding. If the document is silent, ask the seller or landlord directly about mold history. Written answers protect you more than verbal ones.

Policies vary, and your insurer decides what is covered.

If Mold Is Hidden

Hidden mold can appear after you move in, even when the seller or landlord said nothing. In that case, you may have legal options if you can show they knew about the problem and did not disclose it. That usually requires evidence like repair invoices, photos, or witness statements.

Start by documenting the mold and any related damage. If you suspect water damage, have a professional inspect the property to find the source. A water damage inspection can reveal hidden moisture behind walls or under floors. That information helps you decide your next steps.

Related help pages:

  • Water-damage-inspection
  • Moisture-mapping
  • Leak-detection-services
  • Flood-damage-cleanup

Protecting Yourself as a Buyer or Renter

Before you sign anything, ask pointed questions about mold and water damage. Get every answer in writing. If possible, visit the property during or right after heavy rain to spot leaks. Look for stains, musty odors, or damp spots on ceilings and walls.

If you discover mold after moving in, act quickly to protect your health. See a doctor if you feel unwell. Keep records of all communication with the seller or landlord. For cleanup, you might need professional help, especially if the mold covers a large area.

  • Structural-drying-dehumidification
  • Drywall-water-damage-repair
  • Ceiling-water-damage-restoration
  • Water-damaged-flooring-removal

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Frequently asked questions

What if the seller didn't disclose mold but I found it after closing?

You may have a legal claim if you can prove the seller knew about the mold and hid it. Document the mold, keep all written communications, and consult a real estate attorney about your options. Act quickly because some states have time limits for such claims.

Does a landlord have to fix mold if I report it?

In most places, yes, if the mold is caused by a maintenance issue like a leak or poor ventilation. Report it in writing and give the landlord a reasonable time to fix it. If they do not act, you may have legal remedies, but check your local laws first.

Can I break my lease because of mold?

Breaking a lease due to mold depends on your state and the severity of the problem. If the mold makes the unit uninhabitable and the landlord fails to remediate it, you may have grounds to leave. Always document everything and seek legal advice before you move out.

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