You’re in escrow and someone just told you the transaction requires a WDO inspection. Maybe your lender flagged it, maybe the purchase contract required it, or maybe your agent mentioned it in passing and assumed you already knew what it meant. The inspection itself is more straightforward than it sounds. Once you understand what it covers, what happens during the visit, and what the report will actually require before your transaction can close, the process becomes much clearer.
We’ve been performing WDO inspections for buyers and sellers throughout Ventura and Los Angeles Counties since 2016, and the same questions come up before nearly every appointment. What will the inspector look at? What do the findings mean for the loan? How do you avoid delays? This post answers all of that in plain language, organized the way the process actually unfolds.
What a WDO Inspection Is (and Why It’s Not the Same as a Home Inspection)
A wood destroying organism (WDO) inspection, sometimes called a WDI inspection, is a formally filed legal document. Only an inspector licensed by the California Structural Pest Control Board (SPCB) holding a Branch 3 structural pest control license can issue one. A general home inspector can’t, regardless of how thorough their report is.
The scope is specific: the report covers wood-destroying organisms only. That means drywood termites, subterranean termites, wood-boring beetles, and wood decay fungi (often called dry rot). It doesn’t cover rodents, cockroaches, or general household pests. California state law doesn’t require a WDO report for every sale, but mortgage lenders routinely require it as a condition of funding, particularly for VA and FHA loans. Even on conventional loans, it’s common enough that treating it as a standard escrow step is the safer approach.
What the Inspector Does During the Visit
California law requires that inspections be non-destructive, so the inspector reports only on what’s physically visible and accessible on the day of the visit. Nothing is cut open or dismantled. The visit typically takes between 45 minutes and an hour and a half, depending on the size and complexity of the property.
The tools are straightforward. A sounding tool is used to tap window sills, door frames, and exposed beams, listening for the hollow thud that indicates wood has been consumed from the inside. A moisture meter identifies areas where hidden leaks or elevated moisture are creating conditions favorable to wood decay fungi or subterranean termites. In some cases, a borescope lets the inspector confirm live activity inside a wall or framing cavity without opening it up.
In Ventura, two species get the most attention during these visits:
- Western drywood termite (Incisitermes minor): The only economically significant drywood species in Ventura County, most often found in attic framing and eaves of coastal homes. Salty air and sun exposure accelerate wear on exterior paint and caulking, creating more entry points along rooflines and window frames.
- Western subterranean termite (Reticulitermes hesperus): The most abundant and destructive subterranean species in coastal Southern California. Inspectors check the exterior foundation perimeter carefully for the mud tubes these colonies use to travel from soil to wood.
Ventura County’s warm coastal climate keeps termite colonies active year-round rather than driving them into seasonal dormancy, which means an inspection can turn up live activity at any time of year.
How to Prepare Before the Inspector Arrives
Preparation matters more than most sellers realize. When an area can’t be accessed on inspection day, the report notes it as “Area Inaccessible.” That notation isn’t neutral. It typically triggers a follow-up inspection and can push your closing date back by days or longer. A few things to handle before the inspector arrives:
- Clear under-sink cabinets in kitchens and bathrooms so the inspector can check for moisture damage at plumbing penetrations.
- Move vehicles out of the garage if the attic access hatch is located there, which is common in Ventura homes.
- Unlock crawlspace doors and any sub-area access panels.
- Move firewood, potted plants, and wood debris at least two feet from the exterior foundation perimeter.
For homes with additions, enclosed patios, or converted garages, make sure the transitions between old and new construction are accessible. These framing junctions are among the most common drywood termite entry points we see, and they’re easy to block off with stored furniture or boxes without realizing it.
Reading the Report: Section 1, Section 2, & What Lenders Actually Require
The WDO report divides findings into two categories, and understanding the difference is critical to navigating escrow.
Section 1 Findings
These are active infestations or existing damage present right now. Most mortgage lenders, including VA and FHA lenders, require Section 1 findings to be treated and corrected before they’ll fund the loan. From a lender’s perspective, these items aren’t negotiable.
Section 2 Findings
These are conditions that aren’t actively infested but are likely to lead to future infestation. Wood-to-soil contact, excessive moisture, or deteriorating caulking are common examples. Section 2 items are disclosed in the report but handled differently depending on the loan type. VA loans typically don’t require them to be corrected; the VA’s focus is on active conditions that threaten the home, not future possibilities, though individual lenders may add their own requirements. FHA lenders may require correction in some cases. Conventional lenders often don’t require it for funding, though buyers and sellers may negotiate over who handles them.
One rule that surprises people: in California, the clearance letter issued after Section 1 work is completed is considered current for 90 days. If escrow extends past that window, a re-inspection is typically required before the lender will proceed. This matters most on transactions that encounter delays after the initial work is done.
After the Findings: Treatment, Clearance, & Keeping Escrow on Track
After a Section 1 finding, the process runs in sequence: treatment is completed, a Notice of Work Completed is issued documenting that treatment, and then the clearance certificate is issued confirming the finding has been resolved. Both documents must be in hand before the lender will fund. Submitting only one and assuming the other will follow is where transactions stall.
The practical good news: California homes over 10 years old will almost always have some WDO finding, and that doesn’t mean the transaction is in trouble. Most minor drywood termite findings in Ventura can be addressed with localized treatment, which doesn’t require fumigation or homeowner displacement. A targeted treatment to a specific framing member or window frame is far less disruptive than people expect when they first hear the word “termites.”
The best way to keep escrow on schedule is to order the inspection early, before your lender issues preconditions, so any findings have time to be treated, cleared, and documented well ahead of the closing date. Waiting until the final week of escrow to schedule is the single most avoidable source of delay we see. If you’re in the Ventura area and need to get a WDO inspection scheduled, Dr. Termites has offered same-day appointments since 2016 and can be reached at (805) 521-9168.