The short version
Most termite problems in Antioch are western 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 in spring.
- Drywood termites need wood treatment or fumigation instead.
- An inspection typically costs $75–$250.
- Insurance usually doesn’t cover termite damage.
Anyone in Antioch who owns, rents out, or is buying a home and wants to know whether termites are a real concern.
What to look for
Mild winters barely slow them down. Spongy floors or bubbling paint usually mean long-running damage. So it's worth an inspection, even for one or two signs. Termites work quietly. A colony can feed inside a wall for years.
- 1Damage found during a remodel or repair.
- 2Sagging or spongy floors near exterior walls.
- 3Layered, honeycombed wood packed with soil.
- 4Blistered or bubbling paint on wood surfaces.
- 5Winged swarmers indoors, especially in spring.
- 6Termite tubes hanging down from ceilings or joists.
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.
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
Borate is brushed or sprayed onto bare wood in crawl spaces. Termites that eat treated wood around an Antioch home die, and the protection lasts as long as the wood stays dry.
- Time
- 1–3 hours
- Best for
- Small drywood spots, wall voids, and exposed framing
Annual Renewal and Monitoring
$150–$400 per year
Ask what a renewal in Antioch actually includes, and whether it covers retreatment or repairs. A retreatment-only plan is common; damage repair coverage costs more.
- 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)
A liquid barrier treatment around an Antioch home means trenching and rodding termiticide into the soil along the foundation. Non-repellent products let termites pass through and carry the chemical home to the colony under Antioch.
- 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.
A slow leak under a sink keeps the wood damp, and damp wood is exactly what termites are looking for.Which termites live around Antioch.
It needs steady moisture. Drywood termites are common around Antioch as well, flying straight into attic framing, eaves and furniture without any soil contact. Look for tiny piles of pellets that look like coarse sand. The termite you're most likely to meet in Antioch is the western subterranean termite. It nests in soil and builds mud tubes to reach wood.
Local termites conditions in Antioch.
An inspection in Antioch usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Antioch'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 Antioch and California 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. Antioch sits in a local climate, and that sets the pace for termite activity here: the warmer months. For Antioch homes, 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.
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.
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. For Antioch homes, western subterranean termites usually swarm in spring, and again in fall after the first good rain. Drywood termites around Antioch tend to swarm in late summer and fall.
Where to look around your house.
Outside, check porches, steps and decks that touch soil. Wood should stay several inches above the ground. The same advice applies across the area, from Antioch out to Fremont and Oakland. Plenty of homes in Antioch have basements, so check where the wood framing sits on top of the foundation wall. Look around window wells and unfinished walls.
A year of termites in Antioch.
- Fall: clear gutters and move firewood away from the walls. - Summer: termites follow moisture. Watch AC lines, sprinklers and hose bibs. - Spring and fall: swarm seasons. For Antioch homes, swarms often follow the first warm days and the first fall rain. - Winter: a good time to book an inspection in Antioch, before swarm season starts.
What happens at an inspection.
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. Afterward, ask them to show you what they found. A moisture meter and a probe help them find hidden activity. They'll check the basement walls and sill plate.
Termites or ants?
- 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. - 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.
Getting ready for treatment day.
Mark sprinkler heads and any buried lines. Move stored boxes away from garage walls. Clear a path along the outside walls. Soil treatments and bait stations need little prep. Any drill holes in a slab or patio get patched. Ask how long to stay off treated soil. Keep pets and kids inside while the crew works outside.
Mulch and termites.
A dry strip along the house lets you spot mud tubes. Keep mulch thin and pull it back from the foundation. Wood chips right against siding hold moisture termites like.
Questions to ask before you sign.
- 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 do I need to do before and after treatment? - Which termites did you find, and where?
What affects the price
- Linear feet of foundation to be treated.
- Warranty type: retreatment only or damage repair.
- Slab, crawl space, or basement construction.
- Time of year and how booked up local companies are.
- Extent of existing damage needing repair.
- Annual renewal and monitoring fees.
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What's your biggest concern about termites?
When to call for help
Call if you see mud tubes, pellets or an indoor swarm. Hollow-sounding wood is another clue. Buying or selling? Get a wood-destroying insect (WDI) report either way. Lenders often ask for one. It's also the cheapest termite service. Carpenter ants leave clean tunnels and sawdust. Termites leave mud.
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 Antioch
An inspection in Antioch that starts outside and works inward usually finds the entry points, moisture, and shelter that matter most before anyone treats. Antioch has a local climate, and termites activity here tends to follow the warmer months. Most houses will see termites at some point. Termite activity in California is above average. Think leaky hose bibs, AC drain lines, sprinkler zones and short downspouts. Around here they gather where water collects. Termites need moisture.
Local research
Termites in Antioch, CA: what the public record shows
Before you compare quotes, it helps to know which termites actually live in California, when they are busiest around Antioch, and what the state figures look like. Everything below links to the agency or university page it came from.
Termite control products for drywood termites
Drywood and subterranean termite work in California is effectively professional-only; the state licenses it by branch.
UC Statewide IPM ProgramTermite species recorded in California
- 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…
- Western drywood termite (Incisitermes minor) — UC IPM: 'California's second most important termite pest', 'commonly found along the Pacific coastal region extending into the Central Valley and deserts of Southern California'…
- Desert subterranean termite (Heterotermes aureus) — UA Extension calls it an 'important structural pest' of the desert Southwest. UC IPM: 'flies in the late afternoon or early evening in July, August, and September'.
- Western subterranean termite (Reticulitermes hesperus) — Oregon State: causes damage to structures in the Pacific Northwest and 'may swarm any time of year'. Utah State describes swarmers 3/8 inch long and workers 1/4–3/8 inch, pale c…
When termites are busiest around Antioch
Reticulitermes swarm in the afternoon in spring or fall on clear days after a soaking rain; drywood swarmers fly in daytime during summer and fall; Heterotermes aureus flies late afternoon/early evening in July–September (UC IPM).
UC IPM: Reticulitermes 'can be encountered in nearly all regions of the state'; the western drywood termite is 'California's second most important termite pest', found along the Pacific coast, Central Valley and Southern California deserts. FDACS lists California among states with Formosan termites. Branch 3 covers 'the control of wood-destroying pests or organisms by the use of insecticides or structural repairs and corrections'; Branch 1 covers fumigation.
Rules that apply in California
Sources: Drywood Termites (Pest Notes); University of Georgia Extension; University of Missouri Extension; Formosan Termite Program; Not All Termites Are Terrible (Home and School IPM Newsletter); Termites | Solve Pest Problems. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep termites away
- Screen attic and foundation vents with fine mesh.
- Use borate-treated or pressure-treated lumber for repairs.
- Never leave form boards or scrap lumber in the soil.
- Trim shrubs so foundation walls stay visible and dry.
- Install a vapor barrier over crawl space soil.
- Remove tree stumps and buried wood near the house.
Compare quotes line by line: the areas treated, the product, the warranty and the renewal fee. The lowest total isn't always the best deal.Did you know?
For Antioch homes, termites have been chewing wood for well over 100 million years, since the age of the dinosaurs.
Some African termite mounds stand more than 25 feet tall.
Questions people ask
Do I need a termite inspection when buying a house?
Even when it is optional, an inspection on an Antioch home costs little and can surface damage or old treatments the seller may not know about. Many lenders serving Antioch require a WDI report before closing, and VA loans require one in many states. In most cases, yes.
Is termite treatment safe for kids and pets?
Ask your Antioch pro for the product label and safety data sheet, and follow any re-entry times. Bait stations are locked and buried. When applied according to the label, termite treatments around Antioch, California homes are designed to stay in the soil and wood where termites travel.
Can I treat termites myself?
If you want to do something today, pull wood and mulch away from your Antioch foundation while you book the inspection. Professional baits and non-repellent termiticides do. Spot sprays and stakes do not reach the colony. DIY termite control in Antioch usually ends with a bigger bill later.
Will termites come back after treatment?
Yearly monitoring is cheap insurance for an Antioch home compared with a second full treatment. Widely published figures put liquid barriers at five years or more. A good treatment in Antioch keeps termites out for years, not forever.
Are mud tubes always a sign of active termites?
An Antioch inspector can confirm and trace where it leads. A repaired tube or live workers means the colony is active. Break open a section of the tube on your Antioch foundation and check back in a day or two. Not always, but they always deserve attention.
Are termites common in California?
Around Antioch, the usual culprit is the western subterranean termite.
Sources (4)
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