Nondisclosure Litigation in California Real Estate

Nondisclosure Litigation in California Real Estate

What Buyers and Sellers Need to Know

Tierney Law Group, P.C.  •  June 2026

Few disputes in California real estate are more disruptive—or more avoidable—than those involving a seller’s failure to disclose known defects. Whether you are a buyer who discovered a material problem after closing or a seller confronted with a post-sale lawsuit, the outcome often turns on one question: what did the seller know, and when did they know it?

At Tierney Law Group, we represent both buyers and sellers in California nondisclosure disputes. Our goal is the same in either posture: to protect our client’s interests with a clear-eyed assessment of the facts and the law.

California’s Disclosure Framework

California imposes some of the most comprehensive real estate disclosure obligations in the country. The cornerstone is the Transfer Disclosure Statement (TDS), required under Civil Code §§1102 et seq. for virtually every residential sale of one to four units. The TDS requires the seller to disclose all known material defects—conditions that would affect the value or desirability of the property in the eyes of a reasonable buyer.

Important disclosures do not stop at the TDS. California also requires:

• Natural Hazard Disclosure (NHD): flood zones, fire hazard severity zones, earthquake fault zones, and similar conditions.
• Mello-Roos and special assessment disclosures.
• HOA governing documents and financial condition (where applicable).
• Lead-based paint disclosures for homes built before 1978 (federal law).
• Smoke detector, carbon monoxide detector, and water heater bracing compliance.

Two significant additions took effect in 2026:

AB 455 — Tobacco Smoke Residue

Assembly Bill 455 now requires sellers to disclose whether the property has been used for tobacco smoking during the seller’s period of ownership. Tobacco residue—sometimes called “thirdhand smoke”—can require extensive remediation and materially affects value. Failure to disclose is now an independent basis for a nondisclosure claim.

SB 410 — Balcony and Elevated Structure Inspection Reports

Senate Bill 410 extended inspection and reporting requirements for balconies, decks, elevated

walkways, and other exterior elevated elements in multifamily residential buildings. For condominiums and multi-unit properties, sellers must ensure that required inspection reports are current and disclosed to buyers. Structural failure of elevated elements is a major source of personal injury and property claims; SB 410 aims to put buyers on notice before closing.

“As-is” is not a shield. California courts have consistently held that a seller cannot contract out of the duty to disclose known material defects. An “as-is” clause does not waive statutory disclosure obligations.

Common Categories of Nondisclosure Claims

Most nondisclosure disputes fall into one or more of the following categories:

Water Intrusion and Moisture Damage

Roof leaks, foundation seepage, shower pan failures, and plumbing leaks are the most frequently litigated nondisclosure defects. California’s climate—including both rainy seasons and expansive soils—creates conditions where moisture damage can develop, be repaired cosmetically, and recur after close of escrow. Buyers often discover water intrusion only after the first significant rain. Sellers with prior knowledge of active or repaired leaks must disclose, even if they believe the problem was fixed.

Structural Defects

Foundation movement, cracks in load-bearing walls, settling, and pest damage (particularly subterranean termites) are common structural claims. California’s Right to Repair Act (Civil Code §§895 et seq.) provides a specific framework for newly constructed residential properties, but older homes are generally governed by common law fraud and statutory disclosure standards. A seller who has received a pest inspection report revealing infestation or damage must disclose it.

Environmental Hazards

Asbestos-containing materials, lead paint, mold, radon, underground storage tanks, and proximity to contaminated sites are all potential sources of nondisclosure liability. Many of these hazards are invisible to ordinary inspection and require specialized testing to detect. If a seller is aware of any environmental condition affecting the property—through prior testing, neighbor disclosures, or municipal records—that information must be shared.

Neighborhood and Off-Site Conditions

California’s disclosure duties extend beyond the four walls of the home. Known nuisances, noise sources, pending litigation affecting the property, shared-well disputes, and homeowner association enforcement actions are all potentially disclosable. Sellers who fail to mention a long-running neighbor dispute or a pending special assessment have faced successful nondisclosure claims.

Unpermitted Work

Work performed without building permits—converted garages, added bathrooms, room additions—must be disclosed. Unpermitted improvements can require costly demolition or retroactive permitting, and title insurers often exclude coverage for conditions arising from unpermitted work.

The Buyer’s Perspective: Pursuing a Nondisclosure Claim

A buyer who discovers an undisclosed defect after closing has several potential avenues for relief, but timing and documentation are critical.

Legal Theories Available to Buyers

California buyers typically pursue one or more of the following theories:

• Fraudulent Concealment: The seller knew of a material defect and intentionally withheld it. This is the strongest theory and can support punitive damages.
• Negligent Misrepresentation: The seller made a false statement without reasonable grounds for believing it was true.
• Statutory Violation: Civil Code §1102 et seq. provides a statutory right of action for TDS violations. Buyers need not prove fraud; a knowing failure to disclose is sufficient.
• Breach of Contract: Where the purchase agreement or disclosure documents contain affirmative representations that prove false.

Remedies

Depending on the theory and the facts, a buyer may recover:

• Rescission: Unwinding the transaction and recovering the purchase price, where the defect is sufficiently material. Rescission is an equitable remedy and requires the buyer to tender the property back.
• Compensatory Damages: Out-of-pocket repair costs, diminution in value, loss of use, and consequential damages such as temporary housing costs.
• Punitive Damages: Available for intentional fraud; requires clear and convincing evidence of oppression, fraud, or malice.
• Attorney’s Fees: Fee awards are not automatic in nondisclosure cases, but certain statutory claims may support a fee request.

Statute of Limitations

Buyers must act promptly. The statute of limitations for fraud in California is three years from discovery of the facts constituting the fraud (Code Civ. Proc. §338(d)). For claims based on latent defects in new residential construction, Code Civ. Proc. §337.15 provides a ten-year outside limit. Delay in investigating or filing can result in the loss of viable claims.

The single most important step a buyer can take after discovering a potential defect is to document everything immediately: photographs, contractor estimates, and a written record of when the condition was discovered and what the seller’s TDS represented.

The Seller’s Perspective: Defending a Nondisclosure Claim

Sellers who receive a post-closing demand or lawsuit face a stressful and often expensive process. The right defense strategy depends on what the seller actually knew, what was disclosed, and the quality of the transaction’s paper trail.

Key Defenses

A seller’s strongest defenses typically include:

• No Knowledge: The seller genuinely did not know of the defect. A seller cannot disclose what they did not know. The buyer’s burden is to prove the seller had actual knowledge.
• Adequate Disclosure: The condition was disclosed—in the TDS, a supplemental disclosure, or through buyer’s inspection reports obtained during escrow.
• Buyer’s Own Inspection: Where the buyer had the property professionally inspected and the defect was within the scope of what a competent inspector would have found, the seller may argue the buyer assumed the risk by proceeding with knowledge of the condition.
• “As-Is” Acknowledgment Combined with Inspection: While an “as-is” clause does not by itself defeat a disclosure claim, it is relevant context when the buyer also had an opportunity to inspect and accepted the property’s condition.
• Causation and Damages: Even where a disclosure violation occurred, the seller may contest whether the defect was actually material, whether the claimed damages are accurate, or whether the buyer’s own actions contributed to the harm.

Protecting Sellers Before Closing

The best defense is a thorough pre-sale disclosure process. Sellers who work with counsel to prepare complete, accurate disclosures—including supplemental disclosures that go beyond the form TDS—reduce both litigation exposure and liability. A well-documented disclosure package can defeat a buyer’s claim before it ever gets to trial.

Sellers should also retain all prior inspection reports, repair invoices, permit records, and contractor communications. These documents establish both what the seller knew and what steps were taken to address known conditions.

The Role of Real Estate Agents

California imposes disclosure obligations on listing agents as well as sellers. A listing agent who is aware of a material defect—or who should have been—has an independent duty to disclose. Buyers who suffer from nondisclosure often have claims against the listing brokerage in addition to the seller, and buyers’ agents can also face liability if they failed to exercise reasonable care in reviewing disclosures.

Agent liability does not reduce the seller’s exposure; it creates parallel claims. A seller who believed their agent would “handle” the disclosures remains personally liable for failures in the disclosure package.

Litigation or Settlement?

Most California nondisclosure disputes settle before trial. The cost of litigation—expert witnesses, depositions, document discovery, and trial preparation—often motivates both sides to negotiate. That said, settlement requires leverage, and leverage comes from facts.

For buyers, documentation of the defect and repair costs, evidence of the seller’s prior knowledge (prior inspection reports, contractor invoices, prior listings), and a credible damages calculation create the foundation for a meaningful settlement demand. For sellers, a thorough analysis of the disclosure record and the buyer’s inspection history helps identify whether the claim has merit and where the exposure truly lies.

Mediation is often required under standard California purchase agreements before suit may be filed. An experienced mediator can bridge the gap in many cases. When mediation fails, litigation is the path forward, and preparation is everything.

Tierney Law Group Represents Both Buyers and Sellers in California Real Estate Nondisclosure Disputes

Whether you have just discovered an undisclosed defect or received a demand letter after selling your home, early legal counsel makes a significant difference. The facts are time-sensitive, the legal theories require careful analysis, and the right strategy on day one affects the entire trajectory of the dispute.

Tierney Law Group, P.C. handles real estate litigation throughout the San Francisco Bay Area and Northern California. We are experienced on both sides of nondisclosure disputes and bring the same rigorous, practical approach to every matter.

Contact us: (925) 362-3364  |  [email protected]  |  www.tierneylawgrp.com

This article is for general informational purposes only and does not constitute legal advice or create an attorney-client relationship. The law applicable to your situation may differ based on specific facts and circumstances. Contact Tierney Law Group for advice about your particular matter.