Your lender asks for a WDO inspection report, or your real estate agent pencils it into the transaction checklist, and suddenly you’re wondering what this is and whether it’s actually necessary. In Houston, the answer to that second question is almost always yes. The Texas Gulf Coast sits in what national termite risk maps classify as a “very heavy” infestation probability zone, where subterranean termite colonies stay active every month of the year. That’s a different baseline than most of the country, and it makes a WDO inspection more than a box to check.
At Hartz Pest Control, we’ve been performing WDO inspections for Houston-area homeowners and home buyers since 1989. Transactions move fast, and we’ve seen what happens when buyers assume their general home inspector covered termites or when sellers get surprised by findings during the option period. Understanding how these inspections work before you need one puts you in a much stronger position.
What a WDO Inspection Actually Covers
A WDO inspection is a visual examination of accessible areas of a structure. The inspector looks for wood-destroying organisms: termites, carpenter ants, carpenter bees, and wood-boring beetles, along with conditions that make infestation more likely. The report doesn’t just tell you whether termites are present today; it documents risk factors that could lead to infestation if they’re not addressed.
In Texas, the official output of every WDO inspection is the SPCS/T-5 form, prescribed by the Texas Department of Agriculture’s Structural Pest Control Service. The form records four things: active infestation, previous infestation, visible damage, and conducive conditions such as wood-to-soil contact, moisture accumulation, or wood debris near the foundation. What it doesn’t provide is a structural warranty or a representation that no organisms exist in areas that couldn’t be seen. Areas concealed by furniture, wall coverings, or finished surfaces are outside the scope of the report. Buyers with concerns about inaccessible areas should factor this constraint into their due diligence.
One detail that catches buyers and sellers off guard: a TREC-licensed home inspector isn’t authorized under Texas law to determine the presence or absence of active termites or other wood-destroying insects. Only an applicator licensed by the Texas Department of Agriculture’s Structural Pest Control Service can issue an official WDI report accepted by lenders. If your general home inspector mentions possible termite activity, that observation doesn’t satisfy a lender’s WDI requirement. A separate inspection by a TDA-licensed company is required.
Why Houston Homes Carry Elevated Termite Risk
Two termite species drive most of the damage in the Houston metro. Eastern subterranean termites are present in virtually every neighborhood. Formosan subterranean termites, first documented in Texas at the Houston Ship Channel in Pasadena in 1956, have since spread to 31 Texas counties and established large populations across Harris, Fort Bend, and Montgomery counties.
Formosan colonies are a different order of problem. While a native subterranean termite colony might number in the hundreds of thousands, Formosan colonies can reach into the millions. They cause structural damage at faster rates and can establish aerial nests inside walls or attics when moisture is present. Significant damage can accumulate before any surface signs, such as mud tubes or swarmers, become visible.
Houston’s physical environment compounds the risk in ways specific to this market:
- Year-round activity: High humidity and warm winters mean termite colonies never enter dormancy the way they do in colder climates.
- Flood-elevated soil moisture: Properties that have experienced flooding develop elevated soil moisture that persists for months, creating ideal foraging conditions near foundations.
- Slab-on-grade construction: The dominant foundation type across the Houston metro creates hidden termite entry points at expansion joints, plumbing penetrations, and cold joints where the slab meets footings.
When a WDO Inspection Is Required in Texas
Texas state law doesn’t mandate a WDO inspection for every home sale. Whether one is required depends on your loan type.
VA Loans
The Department of Veterans Affairs requires a WDI inspection for purchases in Texas because the state is classified as a moderate-to-heavy termite risk area. There’s no lender discretion here; the inspection is mandatory before funding.
FHA Loans
An FHA appraisal triggers a WDI inspection requirement if the appraiser observes signs of active infestation or conducive conditions. If the appraiser sees nothing, no inspection is required. Houston’s risk environment makes that a relatively thin line of protection for buyers.
Conventional Loans
Conventional lenders can require a WDI inspection at their discretion. Some do; many don’t. Ask your lender early.
Cash Buyers
No lender-imposed requirement exists, but in a market with Houston’s termite pressure, skipping the inspection means accepting full financial exposure to any infestation present at closing. The cost of a WDO inspection is modest compared to what remediation and structural repairs can run on a heavily damaged property.
One timing detail that matters: the SPCS/T-5 report is typically valid for 90 days for mortgage lending purposes. If closing is delayed beyond that window, a re-inspection is generally required. Schedule the WDO inspection early enough that findings, any required treatment, and a clearance report can all be completed within the option period and before the lender’s deadline.
What Buyers Should Do With the Results
The report comes back. What you do with it depends on what it says.
Active Infestation Found
VA and FHA lenders won’t fund until treatment is completed and a clearance report is issued. Buyers can negotiate for the seller to cover treatment costs and any necessary structural repairs through the TREC contract repair amendment. This is the point where the WDO inspection earns its cost many times over.
Previous Infestation, No Active Activity
This finding doesn’t end a transaction, but it does raise questions worth answering before closing. Ask whether a termite warranty or treatment bond is in place and whether it transfers to the new owner. Confirm the extent of prior structural damage with a qualified contractor, not just the pest inspector’s report.
Conducive Conditions Only
Wood-to-soil contact, moisture intrusion, wood debris against the foundation: these are documented risk factors, not confirmed infestation. Buyers can negotiate for correction or factor the remediation cost into their offer. Sellers who address conducive conditions before listing remove that leverage from any future buyer’s negotiation.
Why Sellers Benefit From a Pre-Listing WDO Inspection
Most sellers think of the WDO inspection as the buyer’s step. It doesn’t have to be, and waiting for the buyer to order it gives up a meaningful advantage.
A seller-ordered inspection before listing shifts timing in the seller’s favor. If active infestation or conducive conditions turn up, the seller can address treatment and repairs before a buyer’s inspector documents them in a transaction-critical report. Last-minute findings during the option period create pressure, renegotiation, and sometimes contract cancellation. Addressing them in advance removes that leverage entirely.
Sellers should also prepare the property before the inspection. Make sure all accessible areas are clear: attic access points, the foundation perimeter, any crawl spaces. Items stored against exterior walls, dense plantings near the foundation, and wood debris piled against the structure are both access barriers and the kind of conducive conditions the inspector will document. Clearing them before the inspection is straightforward and improves the outcome.
A clean SPCS/T-5 report provided at listing builds buyer confidence, particularly for buyers using VA or FHA financing who already know a WDI report will be required. Giving them the answer before they ask removes a variable from the transaction.
Protecting the Largest Purchase You’ll Make
In most real estate markets, a WDO inspection is a routine precaution. In Houston, with year-round termite activity from both native and Formosan species, clay soils that retain moisture after flooding, and slab foundations with multiple hidden entry points, it’s a genuine financial safeguard. The inspection cost is small relative to the exposure it addresses.
Hartz Pest Control has been conducting WDO inspections for buyers, sellers, and homeowners across the Greater Houston area since 1989. When you call our office, someone answers. When we schedule your inspection, you get one of our experienced, familiar technicians, not a rotating crew. Reach us at (713) 999-6817 to schedule a WDO inspection in the Houston area.