The short version
Most termite problems in San Antonio are eastern subterranean termites, and the usual fix is a liquid soil treatment or bait stations. Drywood termites need fumigation or wood treatment instead. Start with an inspection; $75–$250 is typical.
- Look for mud tubes, shed wings and hollow-sounding wood.
- Swarms usually show up from February through April.
- Drywood termites need wood treatment or fumigation instead.
- An inspection typically costs $75–$250.
- Insurance usually doesn’t cover termite damage.
Homeowners, landlords and anyone buying or selling a house in San Antonio, whether you've spotted something or just want to know what to watch for.
What to look for
Termites work quietly. A colony can feed inside a wall for years. Average winter lows near 41°F slow termites near the surface around San Antonio, but they move deeper and keep feeding under heated homes. Spongy floors or bubbling paint usually mean long-running damage. So it's worth an inspection, even for one or two signs.
- 1Damage found during a remodel or repair.
- 2Dry hexagonal pellets under window frames or eaves.
- 3Live pale insects inside a broken mud tube.
- 4Buckling laminate or warped hardwood flooring.
- 5Layered, honeycombed wood packed with soil.
- 6Tiny pinholes in drywall rimmed with mud.
Why it’s worth acting soon
- Colonies grow and spread every year they go untreated.
- Damage hides behind drywall, flooring and trim.
- Homeowners insurance usually doesn’t cover termite damage.
- An active infestation can complicate a home sale.
- Formosan colonies are large and can do serious damage quickly.
Treatment options and typical costs
Termite Inspection and WDI Report
$75–$250
The inspector checks the foundation, garage, attic and damp spots. Bring up anything you’ve noticed.
- Time
- 60–120 minutes
- Best for
- Every job, real estate closings, and yearly peace of mind
Localized Wood, Foam, and Borate Treatment
$250–$1,500
A local treatment is cheaper than fumigation but only covers what the San Antonio technician can find. Hidden drywood galleries elsewhere in the house are not touched.
- Time
- 1–3 hours
- Best for
- Small drywood spots, wall voids, and exposed framing
Annual Renewal and Monitoring
$150–$400 per year
Some San Antonio homeowners drop the renewal after a quiet year or two. That usually voids the warranty and leaves the barrier untested.
- Time
- 30–60 minutes per visit
- Best for
- Keeping a treated home protected after the initial job
Liquid Soil Termiticide Barrier
$1,200–$3,500 (often $3–$16 per linear foot)
Crews in San Antonio dig a shallow trench against the foundation, rod termiticide into the soil, and backfill. Fipronil-type products are widely published to last five years or more.
- Time
- Half a day to a full day
- Best for
- Active subterranean termites; fast knockdown around the foundation
Prices are typical published ranges. Ask what’s included before you compare quotes.
Drywood termites can fly straight into attic framing through vents, so attics belong on the inspection list in warm climates.Which termites live around San Antonio.
It nests in soil and builds mud tubes to reach wood. It needs steady moisture. Formosan termites have spread into parts of Texas too. Their colonies dwarf native ones. Inspectors take them seriously. Drywood termites turn up now and then, mostly in older wood. Look for tiny piles of hard, sand-like pellets. The termite you're most likely to meet in San Antonio is the eastern subterranean termite.
Local termites conditions in San Antonio.
Across San Antonio, the area is mostly residential, so termites pressure can differ from one block to the next depending on how tight the entry points are and how much food, water, or shelter is close by. An inspection in San Antonio usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing San Antonio's seasonal timing lets you schedule treatment before the busy stretch rather than after it, which usually means faster service and a more accurate quote. A provider who works San Antonio and Texas every day can point out the specific conditions that matter most here, and getting the scope, price, and follow-up terms in writing makes it easier to compare options. San Antonio sits in a local climate, and that sets the pace for termite activity here: the warmer months.
Mulch piled against the house and a dripping hose bib give termites moisture and cover. Pull mulch back and fix the drip.When termites swarm here.
Across San Antonio, eastern subterranean termites usually swarm from February through April, typically on a warm, sunny day after rain. Formosan termites in Texas swarm later, from late April into June. Look for them on warm, humid evenings around porch lights. Drywood termites swarm on spring and summer evenings, often near lights. A swarm outside means a colony is nearby. A swarm inside usually means it's in the house. Save a few in a bag, or snap a clear photo. Swarm season is when termites show themselves.
Where to look around your house.
Check the garage edges and behind baseboards. Look where pipes come through the floor. Outside, watch for mud tubes behind shrubs. Keep soil and mulch below the slab edge. Many homes in San Antonio sit on concrete slabs, so termites come up through expansion joints, plumbing gaps and settlement cracks.
A year of termites in San Antonio.
- Spring: swarm season. Across San Antonio, expect it from February through April. Check windowsills and light fixtures for wings. - Winter: a good time to book an inspection in San Antonio, before swarm season starts. - Fall: with about 33 inches of rain a year in San Antonio, make sure gutters and downspouts carry water well away from the foundation. - Summer: with highs around 96°F in San Antonio, termites follow moisture, so watch AC drain lines, sprinkler zones and hose bibs.
What happens at an inspection.
Afterward, ask them to show you what they found. A moisture meter and a probe help them find hidden activity. On a slab, they focus on joints, cracks and pipe gaps. Inside, they check the garage, baseboards, plumbing gaps and the attic. They check the foundation, the soil line and nearby wood. The inspector walks the outside of the house first. Most inspections take an hour or two. Photos help.
Termites or ants?
- Tunnels: termite galleries are packed with mud. Ant tunnels are clean and smooth. - Wings: termite wings are all the same length. Ant wings aren’t. - Waist: termites are thick through the middle. Ants are pinched. - Antennae: termite antennae are straight. Ant antennae bend like an elbow. - Debris: termites leave mud. Carpenter ants leave sawdust.
Getting ready for treatment day.
Keep kids and pets inside while the San Antonio crew applies the product, and ask how long to stay off treated soil. In Texas, swarms begin in January–February in South Texas and not until April or May in the Panhandle (Texas A&M). Flag sprinkler heads and buried lines. Move boxes away from garage walls. Clear a walking path along the exterior walls. Prep is light for liquid treatments and bait stations. Drill holes in slabs or patios get patched afterward.
Mulch and termites.
A dry gap along the house makes mud tubes easier to spot; in San Antonio that means extending downspouts and pulling mulch back from the slab. Pull mulch back from the foundation and keep the layer thin. Wood chips touching the siding trap the moisture termites are after.
Questions to ask before you sign.
- What do I need to do before and after treatment? - Which termites did you find, and where? - What product or system will you use? - Is the whole foundation treated, or just one spot? - What does the warranty cover, and for how long? - What does the yearly renewal cost?
What affects the price
- Attached garages, decks, and additions.
- Extent of existing damage needing repair.
- Wells, drains, or water features limiting chemical use.
- Amount of drilling through concrete and patios.
- Number of bait stations required.
- Linear feet of foundation to be treated.
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What's your biggest concern about termites?
When to call for help
Termites leave mud. Carpenter ants leave clean tunnels and sawdust. It's also the cheapest termite service. Lenders often ask for one. Get a wood-destroying insect (WDI) report either way. Buying or selling? Hollow-sounding wood is another clue. Call if you see mud tubes, pellets or an indoor swarm.
What you can do yourself
Some of the work is yours. Pull mulch back from the foundation. Fix leaks and clear gutters. Keep firewood away from the house. Treating an active colony is harder. The product has to reach the whole colony. It also needs even coverage around the entire foundation. Store-bought sprays usually kill only the termites you see.
Termites in San Antonio
A typical home in San Antonio is worth around $260k, which puts a few hundred dollars for an inspection and prevention in perspective. With summer highs around 96°F, San Antonio's humid subtropical climate decides when local termites are busiest. An annual inspection is common sense here. Texas is one of the most termite-active states in the country. About 33 inches of rain a year in San Antonio is plenty for subterranean termites, especially on any side of the house kept damp by gutters or sprinklers.
Local research
Termites in San Antonio, TX: what the public record shows
Before you compare quotes, it helps to know which termites actually live in Texas, when they are busiest around San Antonio, and what the state figures look like. Everything below links to the agency or university page it came from.
Annual subterranean termite damage in Texas
Texas is one of the costliest termite states, with both native and Formosan species.
Texas A&M AgriLife ExtensionSwarm onset in South Texas
South Texas homeowners should watch for swarmers a full season before the rest of the country.
Texas A&M AgriLife ExtensionTermite species recorded in Texas
- Eastern subterranean termite (Reticulitermes flavipes) — UGA calls it 'the most widely distributed subterranean termite, and it is the most common termite found in the eastern United States'; it swarms February through April in Georgi…
- Formosan subterranean termite (Coptotermes formosanus) — FDACS lists it in Florida, Alabama, Georgia, Louisiana, Mississippi, South Carolina, North Carolina, Tennessee, Virginia, Texas, Arizona, California and Hawaii. Colonies contain…
When termites are busiest around San Antonio
Swarms begin in January–February in South Texas and not until April or May in the Panhandle (Texas A&M).
Texas A&M identifies the eastern subterranean and Formosan subterranean termites as the two economically important species. Termites enter via wood in direct contact with soil and by building shelter tubes over or through foundation cracks; modern termiticides provide approximately 5 years of protection and licensed professionals are recommended.
Sources: Texas A&M AgriLife Extension; Biology of Subterranean Termites in the Eastern United States (B1209); University of Missouri Extension; Formosan Termite Program. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep termites away
- Keep six inches between soil and siding or wood.
- Grade soil to slope away from the foundation.
- Trim shrubs so foundation walls stay visible and dry.
- Never leave form boards or scrap lumber in the soil.
- Set deck and porch posts on concrete, not soil.
- Paint or seal exposed exterior wood.
An inspection starts outside, with a flashlight along the foundation line where mud tubes show up first.Did you know?
Across San Antonio, termites have been chewing wood for well over 100 million years, since the age of the dinosaurs.
Across San Antonio, soldier termites can't feed themselves, so the workers feed them mouth to mouth.
Questions people ask
Do I have to leave my house during termite treatment?
If the San Antonio pro recommends tenting, plan two to three nights away and ask about arrangements for aquariums, medications, and pets. Soil treatments, baits, and localized wood treatments on a San Antonio house do not require you to leave. Only for fumigation.
Do I need a termite inspection when buying a house?
Even when it is optional, an inspection on a San Antonio home costs little and can surface damage or old treatments the seller may not know about. Many lenders serving San Antonio require a WDI report before closing, and VA loans require one in many states. In most cases, yes.
Does fumigation kill subterranean termites too?
A San Antonio inspector who finds both species will recommend both treatments. Subterranean termites need a soil barrier or bait system. Fumigation kills every termite inside the tented San Antonio home, but subterranean colonies live in the soil and simply come back. No.
How long do termite bait stations take to work?
Pros in San Antonio check the stations on a schedule and note how much bait is being eaten, so you can see progress. The active ingredient blocks molting, so termites die gradually. Expect weeks to months for a bait system in San Antonio, Texas to eliminate a colony.
Are mud tubes always a sign of active termites?
Either way, an inspection in San Antonio settles the question and finds any other routes. Fresh, damp tubes with pale insects inside mean activity now. Dry, empty tubes may be old. Mud tubes on a San Antonio, Texas home show that subterranean termites used that route at some point.
Are termites common in Texas?
Around San Antonio, the usual culprit is the eastern subterranean termite.
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Sources (5)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Termite Exterminator · Updated September 11, 2026 · How we write these guides