Termite Treatment Cost in San Antonio: 2026 Price Guide

Last updated: March 7, 2026

By James — 25-year pest control industry veteran

Termite treatment cost in San Antonio ranges from $1,140 to $3,325, with the average homeowner paying around $1,700. San Antonio's warm climate, expansive clay soils, and rapid suburban growth make it a high-risk termite market in South Texas. Subterranean termites are the primary concern, and treatment costs reflect a 0.95x adjustment from national averages due to the region's competitive pest control market.

This guide covers termite treatment pricing specific to the San Antonio metro area, including New Braunfels, Schertz, Boerne, and surrounding communities. For national pricing, see our termite treatment cost guide. For general pest control in the area, see our San Antonio pest control cost guide.

San Antonio Termite Treatment Costs by Method

Termite Species in San Antonio

Eastern subterranean termites

Eastern subterranean termites are the primary termite threat in San Antonio and across most of Texas. These termites build large underground colonies and access homes through mud tubes on foundation walls, through cracks in concrete slabs, or via expansion joints and plumbing penetrations. They are responsible for the majority of structural termite damage in the San Antonio area.

San Antonio's expansive clay soil is a key factor in subterranean termite risk. The clay expands when wet and contracts when dry, creating cracks in slab foundations that provide termites with direct pathways into the home. This soil movement also makes it harder to maintain a continuous chemical barrier around the foundation.

Formosan subterranean termites

Formosan subterranean termites have been spreading into South Texas and have been detected in the San Antonio metro area. Formosan colonies are dramatically larger than native subterranean colonies, often containing millions of individuals. They consume wood at a much faster rate and can cause severe structural damage in a relatively short period.

Like native subterranean termites, Formosan termites are treated with liquid barriers and bait systems. However, their larger colony size may require more extensive treatment and closer monitoring to ensure complete colony elimination.

Treatment Methods and Local Costs

Liquid barrier treatment

Liquid barrier treatment is the most common approach for subterranean termites in San Antonio. A technician trenches along the foundation perimeter and applies a liquid termiticide such as Termidor (fipronil) or a similar product. This creates a continuous chemical barrier in the soil that kills termites on contact.

Liquid treatment costs $285 to $855 for a typical San Antonio home, depending on the size and foundation type. The treatment is effective for 5 to 10 years. However, San Antonio's expansive clay soil can shift and crack over time, potentially creating gaps in the barrier that require retreatment.

Bait station systems

Sentricon and Trelona bait station systems are widely used in San Antonio for ongoing termite monitoring and colony elimination. Bait stations are installed in the ground around the home's perimeter and checked on a quarterly basis. When termites feed on the bait, the active ingredient is shared throughout the colony.

Installation costs $760 to $1,425 in San Antonio, including the first year of monitoring. Annual renewal runs $200 to $375. Bait systems are particularly useful in San Antonio because they work regardless of soil movement, unlike liquid barriers that can be disrupted by shifting clay.

Tent fumigation

Tent fumigation is rarely needed in San Antonio because drywood termites are uncommon this far inland. When fumigation is required, it costs $1,140 to $3,325 based on home size. The process involves sealing the home under a tent and introducing Vikane gas to eliminate all termites within the structure. Homeowners must vacate for 2 to 3 days.

Most San Antonio termite treatments focus on subterranean species and use liquid barriers or bait systems instead. For more on fumigation, see our fumigation cost guide.

Seasonal Termite Patterns in San Antonio

Termite swarm season in San Antonio runs from April through June, with peak activity in late April and May. Swarmers typically emerge after warm spring rains, when temperatures are consistently above 70 degrees. Homeowners may see large numbers of winged termites near windows, doors, or exterior lights during swarm events.

South Texas mild winters mean termites remain active year-round in San Antonio. While feeding rates slow slightly during the coldest weeks of January and February, colonies continue to grow and consume wood throughout the winter months. This year-round activity makes ongoing monitoring through bait systems or termite bonds particularly valuable.

What Affects Termite Treatment Cost in San Antonio

• Expansive clay soil. San Antonio's clay soil expands and contracts with moisture changes, creating foundation cracks that give termites easy access. Homes on expansive soils may need more frequent inspections and retreatment to maintain protection.
• Older neighborhoods. Historic homes in Monte Vista, King William, Alamo Heights, and other established San Antonio neighborhoods often have older foundations with more potential entry points. These homes may require more thorough treatment and inspection.
• Military base housing. San Antonio is home to multiple military installations, including Joint Base San Antonio. The large volume of housing in these areas means pest control companies often offer competitive pricing for termite treatment in surrounding neighborhoods.
• Rapid suburban growth. New construction in areas like far north San Antonio, Helotes, and New Braunfels is typically pre-treated for termites during construction. These pre-treatments last 5 to 10 years and then need renewal, creating a wave of demand for retreatment in newer subdivisions.
• Home size and foundation type. Slab foundations (most common in San Antonio) require perimeter trenching for liquid treatment. Larger homes with more linear footage cost more to treat. Pier-and-beam foundations may need different application methods.
• Infestation severity. A small, localized infestation caught early through a spot treatment ($190 to $570) costs far less than an established colony requiring full perimeter treatment and ongoing monitoring.

WDI Inspections for San Antonio Real Estate

Texas does not legally mandate a termite inspection for home sales, but most mortgage lenders require a Wood Destroying Insect (WDI) report before approving a loan. In San Antonio, the WDI inspection costs $75 to $125 and examines the property for evidence of termites, wood-boring beetles, and other wood-destroying insects.

The buyer typically pays for the WDI inspection in Texas, though this is negotiable. If the inspection reveals active termites or damage, the cost of treatment and repair becomes a negotiation point between buyer and seller. For more detail, see our termite inspection cost guide.

Termite Bonds in San Antonio

A termite bond provides ongoing protection after the initial treatment. Bonds in San Antonio cost $225 to $475 per year for renewal and include annual inspections plus re-treatment if termites return.

Two types of bonds are available:

• Retreatment bond. Covers the cost of re-treatment if termites return. Does not cover repair of termite damage. This is the less expensive option.
• Retreatment and repair bond. Covers both re-treatment and repair of any termite damage found during the bond period. More expensive but provides complete financial protection.

Given San Antonio's year-round termite activity and the foundation challenges caused by expansive clay soils, maintaining a termite bond is a practical investment. An active bond also adds value when selling a home, as buyers in the San Antonio market increasingly expect ongoing termite protection to be in place.

Frequently Asked Questions