Subterranean Termite Treatment Cost: 2026 Pricing Guide
Last updated: March 5, 2026
Subterranean termite treatment costs $200 to $1,500 depending on the treatment method and home size, with the average homeowner paying around $550. Subterranean termites are the most common and destructive termite species in the United States, responsible for approximately 80% of all termite damage. They live in underground colonies that can contain millions of individuals and build distinctive mud tubes to reach wood above ground. This guide covers treatment options, costs, and how to choose between liquid barrier treatment and bait station systems.
For a complete overview of all termite species and treatment methods, see our termite treatment cost guide.
Treatment Methods and Costs
| Method | Cost Range | How It Works | Duration |
|---|---|---|---|
| Liquid barrier (Termidor) | $200 – $800 | Trenching and injecting termiticide around foundation | 5 – 10 years |
| Bait stations (Sentricon) | $800 – $1,500 initial | Stations placed around perimeter, monitored regularly | Ongoing (annual renewal) |
| Bait stations (Trelona) | $800 – $1,500 initial | Similar to Sentricon with different bait matrix | Ongoing (annual renewal) |
| Combination (liquid + bait) | $1,000 – $2,500 | Liquid barrier plus monitoring bait stations | 5 – 10 years + ongoing monitoring |
| Spot treatment | $200 – $500 | Targeted treatment of a small affected area | Temporary (not a whole-home solution) |
Liquid Barrier Treatment
Liquid barrier treatment is the most common method for subterranean termites. It creates a continuous chemical barrier in the soil around the home's foundation that kills termites as they attempt to cross it.
How it works
- Trenching. A trench 6 inches wide and 6 inches deep is dug along the foundation perimeter.
- Drilling. For concrete slabs, porches, and patios, holes are drilled through the concrete every 12 to 18 inches to inject termiticide beneath the slab.
- Application. Liquid termiticide (most commonly Termidor/fipronil) is applied at the labeled rate into the trench and drill holes.
- Backfill. The trench is refilled and drill holes are patched.
Cost factors
- Linear footage. Treatment is priced per linear foot of foundation. Average cost is $3 to $16 per linear foot.
- Accessibility. Concrete slabs, porches, and additions that require drilling increase cost.
- Soil type. Sandy soil absorbs more termiticide; clay soil may require different application techniques.
- Home size. A 1,500 sq ft home with 150 linear feet of foundation costs less than a 3,000 sq ft home with 250+ linear feet.
Products used
- Termidor (fipronil). The industry standard. Non-repellent, meaning termites cannot detect it and walk through the treated soil, transferring the chemical to other colony members.
- Altriset (chlorantraniliprole). Newer product with a different mode of action. Lower toxicity profile.
- Premise (imidacloprid). Non-repellent alternative, typically less expensive than Termidor.
Bait Station Systems
Bait station systems use strategically placed in-ground stations around the home's perimeter. Termites discover the bait, feed on it, and carry it back to the colony where it is shared, eventually eliminating the entire colony.
How it works
- Installation. Stations are installed in the ground every 10 to 15 feet around the foundation perimeter.
- Monitoring. Stations are checked quarterly (or monthly with some systems). When termite activity is detected, monitoring cartridges are replaced with bait cartridges.
- Colony elimination. Termites feed on the bait and share it with the colony through trophallaxis (food sharing). Colony elimination takes several months.
Popular systems
- Sentricon. The most widely used bait system. Uses noviflumuron as the active ingredient. Always Active cartridges contain bait from day one.
- Trelona ATBS. Uses novaluron. Features a compressed bait matrix designed for faster consumption.
- Advance. Uses diflubenzuron. Popular with some regional pest control companies.
Ongoing costs
Bait station systems require annual monitoring and bait replacement at $200 to $400 per year. This ongoing cost is the primary difference from liquid treatment, which is a one-time expense. However, bait systems provide continuous monitoring that alerts you to new termite activity before damage occurs.
Liquid vs. Bait: Which to Choose
| Factor | Liquid Barrier | Bait Stations |
|---|---|---|
| Upfront cost | Lower ($200 – $800) | Higher ($800 – $1,500) |
| Annual cost | None (until retreatment) | $200 – $400/year |
| Speed | Immediate barrier | Colony elimination takes months |
| Colony elimination | Kills foragers, colony may survive | Eliminates entire colony |
| Duration | 5 – 10 years in soil | Ongoing while service continues |
| Monitoring | None built-in | Continuous early warning system |
| Disruption | Trenching and drilling | Minimal (small in-ground stations) |
For active infestations, most professionals recommend liquid barrier treatment for immediate protection. For ongoing prevention, bait stations provide colony elimination and continuous monitoring. A combination approach uses liquid treatment to stop active damage and bait stations for long-term colony control.
Subterranean vs. Drywood Termites
Treatment for subterranean termites is fundamentally different from treatment for drywood termites:
- Subterranean termites require soil-based treatment (liquid barriers or in-ground bait stations) because they live in the ground and build mud tubes to reach wood. They are found nationwide but concentrated in the South, Southeast, and along the coasts.
- Drywood termites live entirely inside wood with no ground contact. They require wood-based treatment: tent fumigation ($1,200 to $3,500+), spot treatment ($200 to $600), or heat treatment ($1,200 to $2,500). They are most common in Florida, California, and Gulf Coast states.
If you are unsure which termite species you have, look for mud tubes on the foundation (subterranean) or small pellet-like droppings (drywood). A professional inspection ($75 to $150, or free with many companies) will identify the species. For more on identifying termites, see our guide on signs of termites.
Termite Bonds and Warranties
A termite bond is a service agreement that provides annual inspections and retreatment coverage if termites are found after treatment. Bonds cost $200 to $500 per year for renewal and are strongly recommended in areas with heavy termite pressure.
There are two types of termite bonds:
- Retreatment bond. Covers the cost of retreating your home if termites are found during the warranty period. Does not cover damage repair. This is the most common type.
- Repair bond. Covers both retreatment and repair of any damage caused by termites during the warranty period. More expensive but provides the most complete protection.
For more on termite inspection costs and what to expect, see our termite inspection cost guide. To learn whether homeowners insurance covers termite damage, see our guide on termite coverage and insurance.
What Affects Subterranean Termite Treatment Cost
- Home size and foundation linear footage. The primary cost driver for liquid treatment.
- Treatment method. Bait systems have higher upfront and ongoing costs than liquid treatment.
- Foundation type. Slab foundations require drilling; pier and beam foundations may need both soil and wood treatment.
- Severity. Active infestations with visible damage may require additional spot treatments.
- Location. Southern states with higher termite pressure often have more competitive pricing due to more providers.
- Accessibility. Crawlspaces, additions, and attached structures affect treatment difficulty.
For complete termite treatment pricing across all species and methods, see our termite treatment cost guide. To learn about tent fumigation for drywood termites, see our house tenting cost guide. For general pest control pricing, see our pest control cost guide. If you are considering DIY treatment, see our guide on how to get rid of termites.
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