The short version
Most termite problems in Downey 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.
Homeowners, landlords and anyone buying or selling a house in Downey, 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. Winters around Downey stay mild, with average lows near 48°F, so colonies keep feeding all year. Spongy floors or bubbling paint usually mean long-running damage. So it's worth an inspection, even for one or two signs.
- 1Wood that sounds hollow when tapped.
- 2Sagging or spongy floors near exterior walls.
- 3Layered, honeycombed wood packed with soil.
- 4Tiny pinholes in drywall rimmed with mud.
- 5Screwdriver sinks easily into sills or trim.
- 6Doors and windows that suddenly stick.
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
Foam termiticide is injected into wall voids liquid cannot reach. In Downey this pairs well with a soil barrier around tricky slab construction.
- Time
- 1–3 hours
- Best for
- Small drywood spots, wall voids, and exposed framing
Liquid Soil Termiticide Barrier
$1,200–$3,500 (often $3–$16 per linear foot)
A liquid barrier treatment around a Downey 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 Downey.
- Time
- Half a day to a full day
- Best for
- Active subterranean termites; fast knockdown around the foundation
Annual Renewal and Monitoring
$150–$400 per year
Termites do not stop foraging after a treatment, so monitoring matters. Yearly visits to a Downey home catch new tubes before they reach framing.
- Time
- 30–60 minutes per visit
- Best for
- Keeping a treated home protected after the initial job
Prices are typical published ranges. Ask what’s included before you compare quotes.
In a basement, the wooden sill plate on top of the block wall is the first piece of wood termites reach.Which termites live around Downey.
The termite you're most likely to meet in Downey is the western subterranean termite. It nests in soil and builds mud tubes to reach wood. It needs steady moisture. Drywood termites are common around Downey 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.
Local termites conditions in Downey.
Downey sits in a local climate, and that sets the pace for termite activity here: the warmer months. In Downey, 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 Downey usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Downey'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 Downey 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.
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.
Swarm season is when termites show themselves. In Downey, western subterranean termites usually swarm in spring, and again in fall after the first good rain. Drywood termites around Downey tend to swarm in late summer and fall. 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.
Where to look around your house.
Many homes in Downey sit on concrete slabs, so termites come up through expansion joints, plumbing gaps and settlement cracks. 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. The same advice applies across the area, from Downey out to Los Angeles and Long Beach.
A year of termites in Downey.
- Winter: a good time to book an inspection in Downey, before swarm season starts. - Fall: with about 15 inches of rain a year in Downey, make sure gutters and downspouts carry water well away from the foundation. - Summer: with highs around 84°F in Downey, termites follow moisture, so watch AC drain lines, sprinkler zones and hose bibs. - Spring and fall: swarm seasons. In Downey, swarms often follow the first warm days and the first fall rain.
What happens at an inspection.
Photos help. 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.
Termites or ants?
- 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. - Tunnels: termite galleries are packed with mud. Ant tunnels are clean and smooth.
Getting ready for treatment day.
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. 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.
Mulch and termites.
Wood chips right against siding hold moisture termites like. A dry strip along the house lets you spot mud tubes. Keep mulch thin and pull it back from the foundation.
Questions to ask before you sign.
- 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 do I need to do before and after treatment?
What affects the price
- Slab, crawl space, or basement construction.
- Local labor rates and licensing requirements.
- Liquid barrier versus bait station system.
- Amount of drilling through concrete and patios.
- Annual renewal and monitoring fees.
- Number of bait stations required.
📊
What's your biggest concern about termites?
When to call for help
Lenders often ask for one. It's also the cheapest termite service. Carpenter ants leave clean tunnels and sawdust. Termites leave mud. 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.
What you can do yourself
Store-bought sprays usually kill only the termites you see. It also needs even coverage around the entire foundation. The product has to reach the whole colony. Treating an active colony is harder. Keep firewood away from the house. Fix leaks and clear gutters. Pull mulch back from the foundation. Some of the work is yours.
Termites in Downey
Most houses will see termites at some point. Termite activity in California is above average. Like nearby Los Angeles, Downey gets about 15 inches of rain a year, so termites gather wherever extra water collects, like sprinkler zones, hose bibs and AC drain lines.
Local research
Termites in Downey, 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 Downey, 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 Downey
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
- Trim shrubs so foundation walls stay visible and dry.
- Keep gutters clean so water does not pool.
- Extend downspouts so water drains away from walls.
- Paint or seal exposed exterior wood.
- Fix leaking hose bibs, faucets, and pipes promptly.
A damp cabinet under a leaky sink is worth reporting to your landlord early. Fixing the leak removes what draws termites in.Did you know?
In Downey, a termite queen can keep laying eggs for 25 years or more.
In Downey, when danger shows up, soldier termites bang their heads against the tunnel walls to warn the colony.
Questions people ask
How long do termite bait stations take to work?
Pros in Downey 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 Downey, California to eliminate a colony.
How do I choose a termite company?
Ask for references, license numbers, and the renewal terms before hiring anyone in Downey. A good inspector probes wood and crawls the whole crawl space. Choose the Downey company whose inspection is most thorough, not the one with the lowest number.
Do I need a termite inspection when buying a house?
Ask a licensed Downey pro for a report dated close to closing. The report shows active termites, past damage, and anything that could attract them. A termite inspection belongs in every Downey home purchase, especially for homes with crawl spaces, slabs on grade, or wood siding.
Do I have to leave my house during termite treatment?
If the Downey 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 Downey house do not require you to leave. Only for fumigation.
Can I treat termites myself?
A Downey professional brings the product, the equipment, and the plan that makes it work. Concentrated termiticides are restricted to licensed applicators. You cannot realistically eliminate a subterranean colony with retail products. You can handle prevention and borate on bare wood yourself in Downey.
Are termites common in California?
Around Downey, the usual culprit is the western subterranean termite.
Sources (6)
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