Termite Treatment Cost in 2026: Bait Systems, Liquid Barriers & Tenting

Start with the inspection

Every termite job starts with an inspection, and it's worth understanding how the pricing works. A standalone inspection runs $75 to $150, but most treatment companies will inspect free because they expect to win the job. The exception is a real-estate transaction, where the lender or buyer requires an official wood-destroying-insect (WDI) report from a licensed inspector — that one you pay for.

The inspection determines everything downstream: which species you have, whether the activity is localized or structure-wide, and which treatment methods will actually work. Subterranean termites leave mud tubes on foundations and need soil-level treatment; drywood termites leave pinholes and pellet-like frass and live entirely inside the wood. Treating the wrong species with the wrong method is how people spend $1,500 and still have termites.

Liquid barriers vs. bait systems

For subterranean termites — the culprit in the vast majority of U.S. infestations — you have two main options. A liquid barrier means trenching around the foundation (and sometimes drilling through slabs or porches) to inject termiticide into the soil, creating a treated zone termites can't cross without picking up a lethal dose. It costs $4 to $16 per linear foot, typically $1,300 to $3,800 for an average home, and a quality application lasts 5 to 10 years with no ongoing fees.

Bait systems take the opposite approach: in-ground stations placed every 10 to 15 feet around the perimeter, loaded with slow-acting bait that foraging termites carry back to the colony. Installation runs $8 to $12 per linear foot — usually $1,200 to $3,000 — but the system only works if someone checks and reloads the stations, which is why it comes with an annual monitoring fee of roughly $280 to $500.

Which wins? Liquid is usually cheaper over a 10-year horizon and works faster on an active infestation. Bait shines where a full barrier is impractical — wells, cisterns, drainage issues, or construction that makes trenching impossible — and it actually kills the colony rather than just blocking it. Plenty of pros use both: liquid at the active area, bait as the long-term perimeter.

When tenting is the answer

Whole-structure fumigation — the circus tent — is specifically a drywood termite treatment, which is why you see it constantly in coastal California and Florida and almost never in Ohio. The house is sealed under tarps and filled with a gas fumigant that penetrates every piece of wood in the structure. Nothing survives it. Costs run $5 to $20 per linear foot, with most homes landing between $1,200 and $3,000 and large houses pushing $4,000-plus.

Budget for the logistics too: you'll be out of the house for two to three nights (add lodging), all food and medications get double-bagged or removed, and plants near the foundation may not make it. The other catch is that fumigation leaves zero residual protection — the gas dissipates completely, so nothing stops new termites from moving in next year. That's why many companies pair tenting with a warranty or follow-up preventive plan.

Heat treatment is the no-chemical alternative: the structure (or a section of it) is heated to around 140°F for several hours, killing drywood termites in place. At $1 to $2.50 per square foot ($800–$2,500 for most jobs), it's often cheaper than tenting, done in a day, and requires no gas — but like fumigation, it leaves no residual, and it can be tricky in homes with heat-sensitive finishes.

The damage repair bill nobody quotes you

Treatment kills termites; it doesn't fix what they ate. Repair costs are the wild card in every termite story. Cosmetic damage — a chewed baseboard, a hollow door frame — runs a few hundred dollars. Structural repairs to joists, sill plates, or load-bearing framing typically run $600 to $3,000, and severe long-term infestations that compromised major framing can climb into five figures.

Two things make this worse than it needs to be. First, homeowners insurance almost never covers termite damage — insurers classify it as preventable maintenance, not a sudden peril. Second, subterranean colonies work slowly and invisibly, so by the time you see evidence, they've often been feeding for years. That combination is the entire argument for annual inspections: $75 to $150 a year is the cheapest insurance policy the industry sells, even though it isn't technically insurance.

What this means for landlords

Termites are a landlord problem twice over. First, habitability: in most states, structural pest control is squarely the owner's legal responsibility — tenants didn't bring the termites, can't treat them, and in several states (California's Civil Code among them) the landlord must remediate wood-destroying pests, full stop. Some states even regulate how tenants must be notified and relocated during fumigation, and the landlord typically bears tenant lodging costs for a tenting job on an occupied rental.

Second, asset protection: termites attack the structure — the actual thing on your balance sheet — and insurance won't pay for it. A $350–$500 annual termite bond per building is one of the few maintenance contracts that's almost always worth carrying in termite-prone states, because it converts an unbounded structural risk into a fixed annual fee with re-treatment included. If you're buying rental property in the South or coastal West, make the WDI inspection a hard contingency and price any active infestation into the offer.

Operationally: inspect at every turnover (vacant units are easiest to check and treat), take tenant reports of swarming insects or hollow-sounding wood seriously within days rather than months, and keep treatment records — they matter at sale time, and a transferable termite bond is a genuine selling point.