Is That Mold? Just a Water Stain?

Final walkthrough. A buyer points at a dark patch on the garage drywall and asks the question everyone has asked at some point: is that mold? The answer comes back quickly: it's just a water stain. A Minnesota appeals decision from this year shows how much weight a quick answer like that can end up carrying.

What the court looked at

In a nonprecedential opinion filed March 23, 2026 (Zhong v. Dudero, No. A25-1068), the Minnesota Court of Appeals looked at a home sale in Eagan. According to the opinion, the buyer noticed black discoloration on the garage drywall at the final walkthrough and asked the listing agent whether it was mold; he said it was just a water stain. After closing, the buyer said it was black mold, with significant mold in the back wall of the garage.

The buyer also pointed to the MLS listing, which described 'new floors, new appliances' and a 'new deck.' The trial court granted summary judgment to the listing agent and brokerage.

The appeals court affirmed in part and reversed in part. On the mold answer, it said whether the buyer's reliance was justified, and whether the agent used reasonable care in answering without further investigation, were questions for a jury. It reversed on the 'new appliances' and deck statements too, but affirmed on the 'new floors' statement because the buyer testified she knew before closing the floors weren't new. The court didn't decide that the agent did anything wrong; it sent the questions back for further proceedings.

The case had unusual facts (the buyer was originally the buyer's agent and became a co-buyer), and the opinion addresses other claims too. We're focusing only on the walkthrough and listing statements.

One more note: the opinion is nonprecedential under Minn. R. Civ. App. P. 136.01, so we're sharing it as a real-world example, not as binding law.

A note on location: this case comes from Minnesota, not California. Disclosure laws, forms and agent duties differ by state, so we're sharing it as an educational example of how a file can unfold, not as a statement of California law or a rule that applies to your transaction. Rules differ by state, and that state's law doesn't govern California transactions.

Why this one is worth a second look

Most of us have answered a casual question at a walkthrough. In this case, a few words about a stain became a central issue on appeal, partly because the buyer testified she trusted the agent's experience.

Listing remarks can travel the same way. 'New' is an easy word to write, and the court looked at each 'new' claim separately against what the buyer knew.

A quick check before your client removes contingencies

Before the walkthrough, compare the listing remarks with the disclosures and reports. Does every 'new,' 'updated' or 'replaced' match what the paperwork shows? If a buyer asks what something is, is the honest answer 'I don't know, here's who can look at it'?

These aren't legal or engineering questions. They're plain-English questions a careful second read can raise. We flag inconsistencies and red flags early, so questions can go to the right professional.

What's at stake

In this case, a walkthrough comment and a handful of listing words are now in front of a trial court again, years after closing. A short pause and a referral to the right professional is usually easier on everyone.

How House Owl helps

We understand how overwhelming the paperwork is. You're the one guiding your client through it. House Owl is a second set of eyes on your disclosures and transaction documents, so questions get caught and referred to the right professional before close.

A simple plan for your next escrow

1. Book a free 30-minute Learn More call. (https://calendly.com/jason-myhouseowl/learn-more-1)

2. We review your disclosures and transaction documents for inconsistencies and red flags.

3. We walk your client through what we found on a recorded Zoom call, and you're invited to join, so they can close with more confidence.

Why House Owl

An independent second read of your disclosures and transaction documents, with the walkthrough saved as a video recording. We can send a quick recap after the review, and if something needs your attention, we reach out to you directly.

Jason Piske has worked in California real estate since 2016 and offers disclosure-risk training to brokerages. The fee is $995 per side, paid at close of escrow, with nothing up front. You can see how it works on our Services page (/services-new) and get quick answers in our FAQ (/faq). Payment terms are in our Terms (https://www.myhouseowl.com/terms-and-conditions).

Close with more confidence

Clients who understand their documents before they sign. That's the outcome worth working toward on every file.

A second set of eyes on your disclosures.

For more information, book a free 30-minute Learn More call. (https://calendly.com/jason-myhouseowl/learn-more-1)

Sources

Zhong v. Dudero, No. A25-1068, Minn. Ct. App. (nonprecedential, Mar. 23, 2026), via Justia: https://law.justia.com/cases/minnesota/court-of-appeals/2026/a25-1068.html

General information, not legal advice. House Owl is an independent document review service, not a law firm, real estate brokerage or home inspector. Owner Jason Piske is a California real estate licensee (DRE 02004501), but in a House Owl review he doesn't act as anyone's agent or represent any party. Laws differ by state; talk to a qualified attorney in your state about a specific situation.