California Mold Disclosure Requirements (SB 732) | Conduit Law

California is the only state in our coverage area with specific mold disclosure requirements. If you're renting or buying property in California, sellers and landlords have legal obligations to tell you about mold problems they know about.

When they don't? That's fraud. And it can mean punitive damages on top of your injury claim.

The Legal Framework: SB 732 and Related Laws

California's Toxic Mold Protection Act (SB 732) and related statutes created a comprehensive framework for mold disclosure:

Health & Safety Code § 26147 (Landlord Disclosure)

Landlords must provide written disclosure to current and prospective tenants if they know of mold in the rental unit that:

• Exceeds permissible exposure limits (note: no specific limits have been set)
• Poses a health threat according to the landlord's knowledge

Since California hasn't established specific permissible exposure limits, the practical standard is: if the landlord knows about mold that could affect health, they must disclose it.

Health & Safety Code § 26148 (Seller Disclosure)

Sellers of residential property must disclose known mold on the Transfer Disclosure Statement (TDS). This applies to:

• One-to-four residential units
• Any mold the seller actually knows about
• Conditions the seller knows could cause mold (like water damage)

Civil Code § 1102.6a (Real Estate Agent Duties)

Real estate agents must:

• Conduct a reasonably competent visual inspection
• Disclose material facts affecting value or desirability
• Disclose conditions they actually know about

Visible mold or water damage that an agent sees (or should have seen) during inspection must be disclosed.

What Counts as "Knowledge"?

The key question: did the landlord or seller know about the mold? Courts look at:

Actual Knowledge

• Prior mold complaints from this tenant or previous tenants
• Mold testing results
• Remediation work performed (or recommended but not performed)
• Property inspection reports noting mold
• Insurance claims related to mold

Constructive Knowledge

What the landlord should have known through reasonable diligence:

• Obvious water damage they failed to investigate
• Musty odors reported by multiple tenants
• Chronic moisture problems never addressed
• Building history of mold in other units

What Must Be Disclosed

Proper mold disclosure should include:

• Location of known mold within the property
• Type of mold if testing was performed
• Cause of the mold problem (water intrusion, humidity, etc.)
• Remediation history—what was done and when
• Ongoing conditions that could cause recurrence

Vague disclosures like "property may have had past water issues" don't satisfy the legal requirement when the seller/landlord has specific knowledge of mold.

What Happens When Disclosure Fails

Failure to disclose known mold opens multiple legal avenues:

Fraud

Active concealment of known mold—or half-truths designed to mislead—constitutes fraud. Fraud claims allow:

• Actual damages (medical expenses, property damage, relocation costs)
• Out-of-pocket losses (costs to remediate mold, moving expenses)
• Punitive damages to punish willful misconduct

Negligent Misrepresentation

Even if the failure to disclose wasn't intentional fraud, landlords and sellers can be liable for negligently failing to disclose material facts.

Breach of Contract

The implied warranty of habitability (Civil Code §1941) is part of every California residential lease. Failure to disclose mold that affects habitability breaches this warranty.

Violation of Disclosure Statutes

Direct violation of Health & Safety Code §26147 or §26148 creates statutory liability independent of common law claims.

Punitive Damages for Non-Disclosure

This is where California law really helps mold victims. Under Civil Code §3294, punitive damages are available when defendants act with:

• Malice: Intent to cause injury or despicable conduct with willful disregard for safety
• Oppression: Despicable conduct subjecting someone to cruel suffering
• Fraud: Intentional misrepresentation or concealment of material fact

A landlord who knows about toxic mold and actively conceals it to avoid remediation costs has committed fraud. The same landlord who retaliates against complaining tenants may demonstrate malice. These facts support punitive damages that can significantly exceed compensatory damages.

The Transfer Disclosure Statement (TDS)

For home purchases, the TDS is critical. Sellers must answer specific questions about property condition, including:

• "Are you aware of any flooding, drainage, or grading problems?"
• "Are you aware of any water damage?"
• "Are you aware of any room additions, structural modifications, or repairs?"

Sellers who answer "no" to water damage questions when they know about past flooding—or who fail to mention that "repairs" included mold remediation—have made false statements.

What Sellers Try (And Why It Fails)

• "As-is" sales: Even in as-is transactions, sellers must disclose known defects. "As-is" means the buyer accepts the property in its current condition—not that the seller can hide problems.
• "We disclosed water damage": Disclosing that water damage was repaired, without mentioning resulting mold, is inadequate.
• "We didn't know": Prior complaints, insurance claims, or obvious visible signs undermine claims of ignorance.

Real Estate Agent Liability

Agents aren't off the hook. California law requires agents to:

1. Visually inspect accessible areas of the property
2. Disclose material facts affecting value they actually know about
3. Not help clients conceal defects

An agent who sees obvious water staining and doesn't investigate, or who knows about mold and helps the seller minimize disclosure, can be personally liable.

Building Your Non-Disclosure Case

To prove the landlord or seller knew about mold and failed to disclose:

Evidence of Prior Knowledge

• Previous tenant complaints: Subpoena management company records
• Maintenance records: Evidence of water damage repairs, roof work, plumbing issues
• Insurance claims: Prior water damage or mold claims
• Property inspection reports: Reports the seller had before listing
• Remediation records: Prior mold treatment the seller didn't disclose

Evidence of Concealment

• Fresh paint over mold: Visible evidence of cover-up
• Deodorizers or air fresheners: Signs of masking musty odors
• Incomplete TDS: Comparing what was disclosed vs. what existed
• Agent communications: Emails showing knowledge or concealment strategy

Your Medical Evidence

• Medical records showing symptom onset after move-in
• Doctor's opinion connecting illness to mold exposure
• The "away from home" pattern

Statute of Limitations for Disclosure Claims

Different claims have different deadlines:

Claim Type	Statute of Limitations	Discovery Rule
Personal injury	2 years	From discovery of injury
Fraud	3 years	From discovery of fraud
Breach of contract	4 years (written)	From breach
Negligent misrepresentation	2 years	From discovery

The discovery rule can extend deadlines when you didn't immediately know about the non-disclosure. But don't rely on it—act as soon as you suspect concealment.

What Non-Disclosure Claims Are Worth

Non-disclosure cases can be worth more than standard mold claims because of punitive damages. Expect:

• Compensatory damages: Medical expenses, property damage, relocation costs, pain and suffering—same as any mold case
• Benefit-of-the-bargain damages: The difference between what you paid and what the property was actually worth
• Out-of-pocket damages: Remediation costs, inspection fees, moving expenses
• Punitive damages: Potentially 2-3x compensatory damages in egregious cases

A case with $100,000 in compensatory damages and clear evidence of fraud could see punitive damages of $200,000-$300,000 or more.

Frequently Asked Questions

Does California set specific mold limits?

No. Despite SB 732 directing state agencies to set permissible exposure limits, no specific limits have been established. This means disclosure is required for any mold the landlord/seller knows could affect health.

Can I sue my landlord even if they disclosed "some" mold?

Yes. Partial or misleading disclosure doesn't satisfy legal requirements. If they disclosed "minor mold in bathroom" when they knew about extensive mold throughout the building, that's inadequate.

What if the seller genuinely didn't know?

If the seller had no knowledge and couldn't have reasonably discovered the mold, disclosure claims fail. But they may still be liable for habitability breaches once they learn about it.

Can I get out of my purchase for mold non-disclosure?

Potentially. Rescission (undoing the sale) is available for fraud. You'd return the property and get your purchase price back. Alternatively, you can keep the property and sue for damages.

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Disclaimer: This blog post is for informational purposes only and does not constitute legal advice. Consult with an attorney for advice regarding your specific situation.

California's mold disclosure laws exist because mold is dangerous and people deserve to know what they're moving into. When landlords and sellers ignore these requirements, they should pay—not just for your injuries, but punitive damages to deter others. Contact Conduit Law for a free consultation on your California mold disclosure case.