North Bay Mold Remediation connects Marin and Sonoma buyers and sellers with local mold inspection and remediation contractors who can work within escrow timelines.
Why a home sale often needs its own mold inspection
Many California home sales include a wood destroying organism report, usually called the termite report. Those reports exclude mold. They may note excessive moisture in the substructure or fungus damage to wood, which is a useful hint, but they don't tell you whether mold is growing or how much it would cost to remove. A general home inspection may flag stains or moisture, but usually stops short of a mold assessment.
That gap matters in the North Bay. Roughly 56 percent of Marin homes were built before 1970, often on raised wood floors over soil, and winters are wet: Kentfield averages about 44 to 48 inches of rain a year. Hillside homes in Mill Valley and Tiburon, older homes near the creek in Larkspur, and historic houses around Sonoma are exactly the kinds of properties where the crawl space and attic deserve a close look.
What a pre-purchase mold inspection covers
- A visual inspection of living areas, bathrooms, kitchen, closets, attic, and crawl space
- Moisture meter readings at stains, plumbing walls, exterior walls, and subfloor
- Air or surface samples when there is a reason to take them, such as a musty smell with no visible source
- A written report with photos, findings, and the likely moisture sources
The EPA says that in most cases, if mold is visible, sampling is unnecessary. For a sale, a few samples can still help document conditions, but the photos, moisture readings, and an estimate of the remediation scope usually matter more to the negotiation. See mold inspection and testing and mold air testing.
Fitting it into escrow
Your purchase contract sets the inspection contingency period, and it is usually short. Book the mold inspection as soon as your offer is accepted, ideally alongside the home inspection and termite report. Lab results add time, so ask about turnaround when you book. If the inspection finds growth, get a written remediation estimate quickly so you and your agent can decide whether to ask for repairs, a credit, or a price change before the contingency expires.
One rule to know: under California Business and Professions Code 7197, a home inspector or their company may not do paid repair work on a structure they have inspected in the past 12 months. Mold-only testing firms aren't home inspectors, and California does not bar the same company from testing and remediating mold. We still recommend keeping testing and remediation with separate firms, so the findings come from someone with no stake in the cleanup.
For sellers
If you know about past leaks or mold, dealing with it before listing can make escrow simpler. A pre-listing inspection tells you what a buyer's inspector is likely to find. If remediation is needed, keep the written scope, the contractor's CSLB license number, photos, and an independent clearance test report. Remediation jobs of $1,000 or more need a CSLB-licensed contractor; check licenses at cslb.ca.gov.
About mold disclosure
California sellers have disclosure obligations about known conditions of a property, and known mold or past water damage can be part of them. The state's Toxic Mold Protection Act also includes mold disclosure provisions, but they are tied to exposure standards that the state health department has not adopted; in 2005 it concluded that science-based exposure limits for indoor mold could not be set. How any of this applies to your sale is a legal question. Ask your real estate agent or a real estate attorney. A mold contractor can document conditions and the work done, but can't tell you what to disclose.
Buying a newer home built on a slab? It won't have crawl space issues, but attics, bathrooms, and plumbing leaks still deserve a look. See crawl space mold and attic mold for what those repairs involve.
In escrow and need a mold inspection? Call (415) 234-5586 or request an estimate and we'll connect you with a local mold contractor.
Mold remediation in Marin & Sonoma
- Mold Remediation → Containment, removal, and cleanup of mold growth in homes and rentals, following the IICRC S520 approach, with the moisture source fixed first.
- Mold Removal & Black Mold Removal → Removing visible mold, including dark-colored growth people call black mold, from walls, ceilings, framing, and contents.
- Mold Inspection & Testing → Visual inspection, moisture mapping, and air or surface sampling to find hidden mold and its water source.
- Mold Clearance Testing → Independent post-remediation testing that confirms the job is done before walls close up or tenants move back in.
- Crawl Space Mold Remediation → Mold on joists, subfloor, and sill plates under raised-floor homes, plus the drainage and vapor fixes that keep it from returning.
- Attic Mold Remediation → Mold on roof sheathing and rafters from leaks, bath fans venting into the attic, and poor ventilation.
- Mold After Water Damage or Flooding → Drying, tear-out, and mold remediation after leaks, burst pipes, and Russian River and creek flooding.
- Bathroom Mold Removal → Mold in shower walls, behind tile, under floors, and on ceilings from leaks and bathrooms without working fans.
- Wall & Drywall Mold Removal → Cutting out and replacing moldy drywall and insulation, and finding the leak or condensation behind it.
- Musty Smell & Hidden Mold Investigation → Tracking down the source of a musty odor when no mold is visible, from wall cavities to crawl spaces and ducts.
- HVAC & Duct Mold → Mold in furnace cabinets, air handlers, and ductwork, coordinated with an HVAC contractor where equipment work is needed.
- Plumbing Leak & Under-Sink Mold → Mold from slow leaks under sinks, behind dishwashers and toilets, and around water heaters and washing machines.
- Rental Mold Inspection & Remediation → Mold in rentals for landlords and tenants: visible mold as a substandard condition under state law, code enforcement, and documentation.
- Home Sale Mold Inspection → Mold inspections during escrow, since termite reports exclude mold, plus remediation before listing or closing.
- Commercial Mold Remediation → Mold remediation for offices, retail, multi-unit buildings, and property managers, scheduled around tenants and operations.
- Mold Air Quality Testing → Air sampling and ERMI-style dust testing, what the lab report can and cannot tell you, and when testing is worth paying for.
Frequently asked questions
Does the termite report cover mold?
No. California wood destroying organism (WDO) reports, the termite reports used in many sales, exclude mold. They may note excessive moisture or fungus damage to wood, but they are not a mold inspection. A separate mold inspection is how you find out whether there is growth.
Does the general home inspection cover mold?
A home inspector may point out water stains, moisture, or visible growth, but a general home inspection usually does not include mold sampling or a mold assessment. If the home inspector flags moisture, a follow-up mold inspection is the next step.
Do sellers have to disclose mold in California?
California sellers have disclosure obligations about known conditions of the property, and past water damage or mold can be part of that. Exactly what applies to your sale is a question for your real estate agent or a real estate attorney, not a mold contractor.
How much does a mold inspection cost?
It varies with the size of the home and how many samples are taken. Published cost guides put a typical inspection with two to four samples at roughly $300 to $700. Ask for a quote that lists the number of samples and the lab turnaround time.
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