Buying a House With Mold

Almost every buyer who calls us is in the same spot. The home inspection came back, one line says something like "possible microbial growth observed, recommend evaluation by a qualified professional," and the inspection contingency has a few days left on it. The inspector did the right thing. General home inspectors are not usually set up to sample and interpret mold, so they flag it and refer it on.

That leaves you with a phrase that sounds alarming, no number attached to it, and a deadline. The goal of testing at this point is simple: turn that phrase into facts you can act on before the window closes.

Work backward from the deadline

Many purchase agreements in Washington and Idaho give the buyer around ten days for inspections, but the actual number is whatever your contract says, so check it with your agent first. Then work backward. Lab results take about two business days after the samples are shipped. Allow a day or two to schedule access through the agents. That means the call should happen as soon as the inspection report lands, not after you have thought about it over the weekend.

If the window is tight, tell us the date when you call. Contingency deadlines get scheduling priority.

What testing tells you that the inspection did not

A home inspector can see staining, smell mustiness and note a moisture problem. What testing adds is three answers the negotiation actually depends on.

Is it mold, and is it active? Dark staining on a sill plate can be old, dry and long dormant, or it can be active growth on wood that is still wet. Moisture readings and sampling separate the two.

Is it affecting the air in the house? Air samples taken indoors and compared against an outdoor control collected the same day show whether the house is carrying spore levels or types that do not belong there. A problem confined to a crawl space corner is a very different conversation from one that is in the living space air.

How big is it? A thermal camera and moisture meter show how far moisture has spread behind finished surfaces, which is what drives the cost of the fix.

What buyers do with the report

The report is a negotiating document. With lab data and a clear description of the affected area, buyers typically ask the seller to do one of three things: remediate before closing with clearance testing afterward, give a credit at closing equal to a reasonable remediation estimate, or reduce the price. If the findings are serious enough and the contract allows it, the report is also a clean basis for walking away.

If the seller agrees to remediate before closing, insist on independent clearance testing after the work, done by someone other than the company that did the cleanup. A remediator testing its own work is grading its own homework, and a buyer has no way to know whether the job was finished.

Why an independent tester matters here

In a real estate deal, everyone has a stake. The seller wants the problem to be small. A company that tests and also remediates earns far more from the cleanup than from the test. We only test. We do not do remediation, we take no referral fees from companies that do, and we have no relationship with either agent. The report says what the data says.

That independence also means we will tell you when the problem is minor. Plenty of purchase inspections end with a moisture fix the buyer can handle after closing and no remediation at all.

Loans and appraisals

FHA and VA appraisers are required to note conditions that affect health and safety, and visible mold can hold up a loan until it is addressed. If you are using one of those programs, see our pages on FHA appraisals and VA loans, because the sequence of testing, repair and clearance matters for getting to closing on time.

Pricing

A standard inspection is $425 and includes one indoor air sample, an outdoor control and lab fees. Additional samples are $100 each. There is no travel charge anywhere in our service area, including Kootenai County.

Frequently asked questions

How fast can you test during an inspection contingency? We prioritize contingency deadlines. The visit usually happens within a few days of the call, and standard lab turnaround is about two business days, so most buyers have a report well inside a typical inspection period.

Does the seller have to let me test? Access is normally arranged through the agents under the purchase agreement. Your agent schedules it the same way the home inspection was scheduled.

Can I use the report to negotiate? Yes. A written report with lab data is the basis for asking the seller to remediate before closing, credit the cost, or reduce the price. It is also what lets you walk away cleanly if the contract allows it.

Will you tell me who should do the cleanup? We can tell you what kind of work the problem needs and what a reasonable scope looks like. We do not do remediation and take no referral fees, so there is no reason for us to inflate the problem.

Is a small amount of mold a deal breaker? Usually not. Most mold found during a purchase is a moisture problem with a known fix and a price. The report is what turns an alarming phrase into a number you can negotiate around.