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Real Estate Termite Inspection Guide for Buyers

7 min read Updated 2026-06-18

A real estate termite inspection goes by a few names. WDI inspection. Termite letter. Whatever you call it, a licensed pro walks the property during a home sale and looks for wood-destroying insects. Plenty of lenders require one before they'll fund the loan, and even when yours doesn't, it's cheap protection for the person buying the house. Below, what the inspection looks at, who tends to pay, and how to make sense of the report before you put your name on anything.

Quick answer

A real estate termite inspection, called a WDI report, is a licensed pro's assessment of a home for termites, carpenter ants, and other wood-destroying insects during a sale. Lenders often require it before funding the loan, and it flags active infestations or damage before you close.

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What WDI Means and Why Lenders Ask for It

WDI stands for wood-destroying insect. The inspection hunts for evidence of termites, carpenter ants, and wood-boring beetles, plus a few other pests that eat into a home's structure. Lenders pay attention for one reason. Termite damage can quietly hollow out the value of the property backing their loan.

This isn't the same thing as a general home inspection or a routine pest check. It zeroes in on wood-destroying organisms and gets written up on a standardized form that most lenders recognize. People sometimes call that form a termite letter.

What the Inspection Covers

A solid WDI inspection goes after the spots where these insects are most likely to be working or leave a trail. The inspector writes down both the findings and any conditions that invite trouble later.

Here's where they usually look:

  • Foundation, crawl space, and accessible exterior for subterranean termite signs like mud tubes
  • Interior baseboards, windowsills, and door frames showing active or past damage
  • Attic spaces for carpenter ants, drywood termites, or roof leaks that feed activity
  • Any wood touching soil (decks, fence posts, planter boxes, stacked firewood)
  • Garage walls and door frames
  • Conducive conditions: standing moisture, leaks, vegetation pressed against the siding

How to Read the Report

The standardized form splits its findings into a handful of sections. Visible evidence of wood-destroying insects. Conditions that could invite a future infestation. Any treatment already on record. And the inspector's recommendations.

Two distinctions matter more than the rest. Active versus previous evidence comes first. Old mud tubes left behind by an infestation that was already treated usually won't sink a deal, but anything active typically has to be resolved before you close. The second is conducive conditions. Read those as early warnings, not strikes against the house. Mulch piled against the foundation or a small leak under a sink are fair things to bring up when you negotiate.

Who Pays for It

It comes down to the loan type and how the purchase contract gets written. A few government-backed loan programs put the report on the seller. Conventional loans and cash deals are often negotiable, or they land on the buyer.

Since the rules shift around, ask your lender and your agent who's responsible early. Don't wait. Booking the WDI inspection with same-week scheduling keeps a tight closing date from turning into a last-minute scramble.

When the Loan Requires a WDI Report

Government-backed loans ask for a WDI report fairly often, and almost always in regions where termite pressure runs high. Conventional loans go either way depending on the lender and the shape the house is in. Cash buyers rarely have to bother.

Get one anyway, even if nobody's making you. The cost barely registers against the price of a house. And catching active termites or hidden damage before you close hands you leverage to negotiate repairs or treatment, instead of inheriting somebody else's problem after the keys change hands.

What to Verify Before You Close

Confirm a few things on the finished report. Is the evidence active or previous? Note any conducive conditions you can knock out yourself. Then look at the treatment history, because a home with a documented prior treatment can carry less risk than one with no record at all.

One last check. Make sure a properly licensed inspector signed it. And if active termites turned up and got treated, a re-inspection that documents the remediation will give you and your lender real confidence before you sign.

Good questions

Frequently asked questions

A WDI (wood-destroying insect) inspection is a licensed pro's assessment of a property for termites, carpenter ants, wood-boring beetles, and similar pests. It gets written up on a standardized report that lenders often require during a home sale.

Depends on the loan type and the contract. Some government-backed loans put it on the seller. Conventional and cash purchases are usually negotiable, or they fall to the buyer. Sort it out with your lender and agent early.

Usually not. Old evidence from an infestation that was already treated is common and tends to be low-risk. Active evidence is the bigger worry, and it normally has to be cleared up before the lender signs off on closing.

Most run about 30 to 90 minutes on-site, depending on the home's size and how easy the crawl space is to reach. The written report usually lands within a day or two.

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