Termite Treatment Cost: Liquid Barriers vs. Bait Systems

Most homes with active subterranean termites cost between $1,500 and $4,000 to treat, and your quote depends mostly on one measurement: the linear feet of foundation the contractor has to protect. Learn that, and you can read almost any quote.

What does a termite treatment actually pay for?

A termite treatment pays for killing the colony or cutting off its path to your house, plus the labor to find entry points and, often, a warranty. It does not pay for repairs.

Subterranean termites live in the soil and reach your framing through mud tubes, slab cracks, and gaps around plumbing. Treatment either puts a chemical barrier in the soil around and under the structure or places bait that workers carry back to the colony. The chewed sill plate stays chewed until a carpenter replaces it. Budget treatment and repair as separate line items.

How much does termite treatment cost?

Typical U.S. prices run $6 to $15 per linear foot for liquid termiticide and $1,500 to $3,500 to install bait stations, with the bait system carrying yearly fees afterward. Region, home size, and company overhead all move these numbers.

The fumigation row applies to drywood termites, which live inside the wood and need a different approach than soil treatments. Fumigation means leaving the house for a few days, and only a licensed fumigator can do it.

How do contractors price the job?

Contractors price a liquid job by multiplying linear feet of foundation by a per-foot rate, then adding extras for hard-to-reach areas. A simple 40-by-50-foot house has 180 linear feet of perimeter, so at $8 to $14 per foot the base treatment lands around $1,440 to $2,520 before extras.

Extras come from interior piers, attached porches, and any wall the crew can't reach from outside. Foundation type matters most:

• Slab: Crews drill through the concrete along the edges, often about 12 inches apart depending on the product label, then inject termiticide. Drilling and patching add labor.
• Crawl space: Usually cheaper, since crews can trench along the inside of the foundation walls. Tight access and standing moisture can raise the price.
• Basement: Often the most labor, because treatment may mean drilling the floor edge or hollow block walls from the inside.

Drilling a slab can hit plumbing, radiant heating tubes, or electrical conduit, so ask how the crew locates them first. Outside trenching should follow an 811 utility locate. A professional normally makes that call, but confirm it.

Prior treatment changes the math too. If a company treated the house within its warranty period, call them first. Many bonds obligate the company to retreat affected areas at little or no charge, which beats paying a new company for a full perimeter job.

Liquid termiticide or bait systems: which fits your house?

For an active infestation in a typical slab or crawl space house, we'd pick a liquid barrier, because it acts faster and most of the cost is paid up front. Bait systems make more sense in specific situations.

Liquid works by creating a treated zone in the soil that termites either avoid or carry the chemical back from. Companies often advertise 5 to 10 years of protection, but landscaping, regrading, and plumbing repairs can break the barrier. Treat those figures as an upper bound and ask what the warranty actually promises.

Bait stations typically go in the ground every 10 to 20 feet around the house, depending on the product. Workers feed on the bait and spread it through the colony, which can take months. Baits fit homes where drilling is impractical, such as finished basements, or where a nearby well or pond makes trenching a concern.

The catch is the monitoring fee. At $200 to $500 a year, a bait contract can pass the total cost of a liquid job within a decade, and you keep paying as long as you want coverage.

So the choice is rarely about price alone. Weigh your foundation type, how fast you need results, and how long you plan to own the house.

What does a termite bond cover, and what does it cost to renew?

A termite bond is an annual service contract that typically costs $100 to $800 a year to renew, and the cheaper versions only promise to retreat if termites return. The pricier versions also cover repair of new damage, usually up to a cap.

Before renewing, check these points:

1. Does it cover retreatment only, or repairs too, and what is the dollar cap?
2. Which structures are included? Decks, additions, and detached garages are often excluded.
3. Is the annual inspection included in the fee?
4. Can the bond transfer to a buyer when you sell?
5. Can the company raise the renewal price, and by how much?

Renewal is worth it when the treatment is recent, the contract includes the inspection, and the bond transfers at sale. It's harder to justify when the original treatment is more than a decade old, the exclusions run long, or the company has changed hands. In that case, paying $75 to $300 for an independent termite inspection can tell you more than the renewal notice does.

When do repair costs outweigh treatment?

Repair costs outweigh treatment when termites have fed for years, because replacing framing runs from a few hundred dollars for a patched sill plate to well into five figures for structural work. Treatment is often the cheaper part of the bill.

That is why timing matters. A wood-destroying insect report before a home purchase typically costs $75 to $250 and can reveal active infestation or past treatment. Standard homeowners insurance generally excludes termite damage as a maintenance issue, but read your own policy rather than assume.

Anything involving load-bearing wood or sagging floors should go to a licensed contractor or structural engineer. Structural repairs may also need a permit, depending on your locality.

What should you ask before signing a termite contract?

Ask for the measured linear feet, the product name and application rate, the warranty terms, and the renewal price in writing before you sign. A reputable contractor will answer without hedging.

Also ask for the applicator's state license number and proof of insurance. For bait, ask how often the company visits and what happens if you stop paying the monitoring fee. And get the renewal price for year two, year five, and year ten, since that's where bonds tend to surprise people.

Collect three written quotes with those details and compare them line by line. If one is far below the others, find out what it leaves out.