Are termites a problem in Arizona? Yes. University of Arizona (UA) Cooperative Extension calls termites Arizona's number one urban pest. The main culprit is the desert subterranean termite (Heterotermes aureus), which the UA names the state's number one economic urban pest. It lives in the soil and travels into homes through mud tubes.
How bad are termites in Arizona? Common, but rarely an emergency. The UA notes termites take "a very long time, often years" to cause structural damage. That's why inspections matter: finding termites before escrow beats discovering them after closing. Here's what to look for around your 85250 home, and how termites show up when you buy or sell.
Data note: Biology and prevention guidance comes from UA Cooperative Extension publications AZ1369 and AZ1356 (2005). Transaction rules come from the Arizona Department of Agriculture, the VA and the Arizona REALTORS® resale contract (November 2025 sample).
Know Your Termites
The UA lists 18 termite species in Arizona, but only a few damage homes:
- Desert subterranean termite: the big one in the low desert. It attacks cactus ribs, desert trees, posts and structural timbers.
- Arid-land subterranean termite: found statewide and the top termite pest around Flagstaff, but much less common in the Sonoran Desert. Its tubes are flatter and dark brown.
- Drywood termites: live inside dry wood, with no soil contact. Look for piles of hard pellets that, under magnification, look like dried corn kernels.
- Tube-building desert termite: coats dead grass, palms and wooden fences with thin earthen sheeting. The UA says it shouldn't be treated unless it's found inside a structure.
Across species, the UA says subterranean termites account for at least 80% of losses to wooden structures.
Signs of Termites in Arizona
Grab a flashlight and walk the outside of the house:
- Mud tubes on the stem wall where soil meets the foundation. Desert subterranean tubes are small, strong and light in color.
- "Drop tubes" hanging from ceilings or the garage rafters
- Cracks in the slab and spots where pipes or ducts come up through concrete
- Hollow-sounding wood: tap trim and framing with a screwdriver every few inches
- Swarmers: pale, yellowish termites about 1/2 inch long with wings, usually flying at dusk after monsoon rains, July through September
When to Check
The UA recommends inspecting the stem wall about twice a year: in spring after a wet winter, and again near the end of monsoon season, when termites are most active. Monsoon just wrapped up, so mid-to-late October is good timing. Even with no signs, the UA recommends an annual professional inspection.
Prevention Around an 85250 Home
The Arizona Department of Agriculture (AZDA) and the UA point to the same risk factors:
- Moisture: fix leaking pipes and faucets, and keep sprinklers and bubblers from soaking the foundation
- Drainage: grade soil so water runs away from the house and stem wall
- Stucco: keep about 4 inches between the soil line and stucco so the stem wall can be inspected
- Planting: keep shrubs, trees and main irrigation lines at least 18 inches from the stem wall
- Wood contact: clear firewood, scrap lumber and cardboard from exterior walls, and watch trellises and wood fences that touch the soil and the house
- Built-in planters against exterior walls can hide entry points
- Small gaps count: AZDA says termites can enter foundation cracks as narrow as 1/64 of an inch
Older homes deserve extra attention. The UA notes that if a house is more than five years old, there's a good chance its "final grade" termiticide treatment has degraded.
Treatment Options in Brief
- Liquid barrier: a trench about 6 inches wide and deep around the house, plus holes drilled about 12 inches apart through adjacent concrete. The UA says a good treatment should show no visible termites after 3 months.
- Bait systems: monitoring stations around the perimeter, typically checked every 30-60 days, with bait added once termites find them
- Wood treatments: borate products applied to bare wood, usually during construction or remodeling
The UA advises getting several estimates from licensed pest management professionals and not treating termites yourself.
Termites When You Buy or Sell
The Wood-Destroying Insect Inspection Report (WDIIR)
- Prepared only by a state-licensed pest control business, on a standardized two-page form with a diagram
- Not a structural damage report, and not a guarantee: inspectors check visible, accessible areas only
- Not required by state law for a sale. AZDA says lenders often require it.
- VA loans: the VA requires wood-destroying insect information for all of Arizona
Who Orders It
Under the Arizona REALTORS® resale contract (November 2025 sample), the buyer orders and pays for wood-destroying insect inspections during the inspection period, including any updated report the lender requires before closing.
Check the History
Pest companies must file an eTARF (electronic Termite Action Report Form) with AZDA within 30 days of treatments and WDIIRs. The public can research a property's reported termite history online. The standard Seller's Property Disclosure Statement also asks about past termites, damage, treatments and transferable warranties. See my Arizona seller disclosure guide.
“Most 85250 inspection reports I see mention termites somewhere: an old treatment, a few mud tubes, a warranty from a prior owner. That's normal for the desert, and it rarely derails a sale. What derails a sale is a surprise. So when I list a home, I pull the termite history before we go live, and when I represent a buyer, I read the WDIIR line by line with them, diagram included.”
— Elizabeth Vijan, Tackett Team, eXp Realty
FAQ: Termites in Arizona
Are termites a problem in Arizona?
Yes. The UA calls termites Arizona's number one urban pest, led by the desert subterranean termite.
What are the signs of termites in Arizona?
Mud tubes on the stem wall, ceiling drop tubes, hollow-sounding wood, pellet piles and dusk swarms after monsoon rains.
Is a termite inspection required to sell a house in Arizona?
Not by state law. Lenders often require a WDIIR, the VA requires one statewide, and the standard contract has the buyer order it.
How do I check a home's termite history in Arizona?
Search AZDA's eTARF database, where licensed companies report treatments and WDIIRs.
Selling an 85250 Home? Know Its Termite Story First
I'll pull your home's reported termite history, walk the stem wall with you, and flag anything to address before a buyer's inspector finds it, so your listing goes live with no surprises.
Elizabeth Vijan | Tackett Team, eXp Realty
Chaparral Park Resident & 85250 Real Estate Expert
Request My Pre-Listing Termite & Disclosure Review · Call or text 602-885-7752
Sources: UA Extension: Arizona Termites of Economic Importance (PDF) · UA Extension: Termite Management for Homeowners (PDF) · AZDA Wood-Destroying Insect Inspection Reports · AZDA Pest Management FAQs (eTARF) · VA wood-destroying insect requirements by state · Arizona REALTORS® resale purchase contract sample (PDF)
Disclaimer: General information, not a pest inspection or legal advice. Contract forms are updated periodically; confirm terms in your actual contract. For termite questions, contact a licensed pest management company or the AZDA Pest Management Division (602-542-4373). Information deemed reliable but not guaranteed. Equal Housing Opportunity.
