Termite Inspection in Arizona: Your Home and Barn

The short answer: A termite inspection in Arizona is formally called a Wood-Destroying Insect Inspection Report, or WDIIR. Arizona rules say only an applicator certified in wood-destroying organism management, working for a licensed pest control business, may complete one. The inspector checks all visible and accessible areas of the structure, including crawlspaces, and must note any areas not inspected and why. Many lenders ask for one, and it is a smart move for buyers either way.

A termite inspection in Arizona is one of those small steps that brings big peace of mind. Our dry desert is beautiful, and it is also home to termites that love wood and moisture, including the wood in barns, tack rooms, shade structures and fence posts. The good news: Arizona has a clear system for these inspections, and a little knowledge makes the whole thing easy.

I am a REALTOR®, not a pest professional. What follows comes from the Arizona Administrative Code rule that governs these reports, R3-8-307, read this week.

WDIIR stands for Wood-Destroying Insect Inspection Report. It is the official Arizona report a licensed pest control business prepares after inspecting a structure for termites and other wood-destroying insects. When your lender, inspector or agent says "termite report," this is what they mean.

Whether you need one usually comes down to your loan: many lenders and some loan types ask for a WDIIR before closing, so ask your lender early. Even when nobody requires it, I recommend it for most buyers, and especially on horse property, where there is more wood on the ground than in a typical neighborhood.

If you are using a VA loan, ask your lender early. Our guide to VA and USDA loans on Arizona horse property covers loan-specific requirements.

Rule R3-8-307 is specific. Only an applicator "certified in the category of wood-destroying organism management, who works under the direct employment of a business license" and has received the required training may complete a WDIIR. A general home inspector is wonderful for the roof, the plumbing and the electrical, but the termite report comes from a licensed pest control business.

The rule says the inspector must examine "all areas of a structure including crawlspaces that are visible or accessible at the time of the inspection." The inspector also looks at places showing evidence of current or previous infestation, and at conditions that invite termites, such as:

• Faulty grade levels, where soil sits too high against the structure.
• Excessive cellulose debris, like scrap wood, cardboard or old hay piled against walls.
• Earth-to-wood contact, where wood posts or siding touch the dirt.
• Excessive moisture, from leaks, misters or irrigation.

Reading that list as a horse person, I smile, because it describes half the barns I have ever loved. Old hay, wood stall walls sitting on dirt, misters running all summer. None of that is a deal breaker. It is simply your to-do list.

Here is the most important tip in this article. The rule says the report must note "all areas that are not inspected and the reason the areas are not inspected" and identify all structures at the site that were not examined.

So read the report closely. On horse property, ask the pest company before they arrive to include the barn, tack room, hay storage, shade structures and any wood outbuildings, not just the house. If the report says the barn was not inspected, you will see it in writing, and you can ask for it to be added.

Pair the termite report with a full property inspection. Our Arizona horse property inspection checklist walks through everything else to look at.

Take a breath. Termites are common in Arizona, and treatment is routine. The rule also allows a supplemental inspection to verify corrective treatment "within 30 days after an original inspection." Your agent can help you use your inspection period to ask the seller for treatment, a credit, or a repair, depending on what the report shows.

If the barn or outbuildings were built without permits, that is a separate conversation. Our guide to unpermitted barns on Arizona horse property covers that.

Often, yes. A pre-listing termite inspection lets you handle any treatment on your own schedule, then hand buyers a clean report and the treatment records. That builds confidence. Sellers also have disclosure duties in Arizona, which our guide to what Arizona sellers must disclose on horse property explains.

• Assuming the home inspector covers termites. In Arizona, the WDIIR comes from a certified applicator at a licensed pest business.
• Not reading the "not inspected" section. That is where barns and outbuildings get left out.
• Waiting too long. Book it early in your inspection period so there is time for treatment.
• Ignoring conducive conditions. Hay against walls and wood touching dirt are easy fixes once you know.

I am Kim Williamson, REALTOR®, with REAL Broker, and I help buyers and sellers of horse property, acreage and homes of every kind across the Metro Plex of Arizona. I have lived in Arizona 36 years and sold real estate here for 24 years, and I have owned and designed three horse properties of my own. Every one of them had wood somewhere it probably should not have been.

My take: book the termite inspection, ask for every structure to be included, read the not-inspected list, and treat what you find. Then go enjoy your barn.

What is a WDIIR in Arizona? A Wood-Destroying Insect Inspection Report, the official termite report prepared by a licensed pest control business in Arizona.

Who can do a termite inspection in Arizona? Only an applicator certified in wood-destroying organism management, employed under a pest control business license, with the required training.

Does a termite inspection in Arizona include the barn? Only if it is inspected. The report must list any structures not examined, so ask for the barn and outbuildings to be included.

Is a termite inspection required to sell a house in Arizona? Arizona pest management guidance has said no state law requires it for a sale; lenders often require it. Confirm with your lender.

What do termite inspectors look for besides termites? Conducive conditions, such as soil against the structure, cellulose debris, wood touching soil, and excess moisture.

Links checked October 10, 2026:

• Arizona Administrative Code R3-8-307, Performing a Wood-destroying Insect Inspection; WDIIRs (Cornell LII)

Do your own due diligence. This is general information. Confirm details with a licensed Arizona pest control business and your lender.

Buying or selling in the Metro Plex of Arizona? Call or text Kim Williamson, REALTOR®, REAL Broker, at 480-206-1500, or start at www.ArizonaHorsePropertyForSale.com.