Ant Control & Extermination
There are over 700 ant species in the United States, but only about a dozen are common household pests. The problem is that each one — Argentine, odorous house, pavement, carpenter, fire, pharaoh, ghost — needs a different treatment approach. Spraying the wrong product on the wrong species often makes the infestation worse by splitting the colony into multiple satellite colonies.
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Signs you have a ants problem
- Visible trails of ants on countertops, along baseboards or going up walls
- Piles of sawdust-like 'frass' near windowsills, door frames or wood siding (carpenter ants)
- Mounded soil piles in the yard, lawn or under stepping stones (fire ants, pavement ants)
- Ant activity around sinks, dishwashers and pet food bowls (sweet-feeding species)
- Faint rustling sounds inside walls (large carpenter ant colonies)
- Stings and painful welts after disturbing yard mounds (fire ants)
Why ants are a serious problem
- Carpenter ants tunnel into damp structural wood — typically cosmetic, but in heavy or long-standing infestations they can compromise framing
- Fire ant stings cause painful pustules and full anaphylaxis in roughly 1-2% of people stung
- Food contamination from indoor foraging trails across food prep areas
- Allergic reactions to ant bites in sensitive individuals
Why DIY ants treatment usually fails
Hardware-store ant sprays kill the foragers — the workers you see — but leave the queen and brood untouched. Most household ant species respond to perimeter sprays by splitting into multiple satellite colonies (a process called 'budding'), and the homeowner ends up with two or three infestations where they previously had one. The right answer for most species is targeted baiting that the workers carry back to the queen — but the bait has to match the species' current food preference (protein vs sweet), which changes seasonally.
The reality: Most homeowners who try DIY end up calling a pro anyway, after spending $50–$200 on hardware-store products and several weeks of failed attempts. The math almost always favors calling a licensed contractor up front.
What a professional ants treatment looks like
Licensed ant contractors identify the species, locate the colony or colonies, then deploy a baiting and barrier program calibrated to that species. Carpenter ant treatment in particular requires locating the parent nest, which is often outdoors in a tree stump or wood pile, plus any indoor satellite nests in damp wall voids.
What it costs
Pricing varies by infestation severity, property size, and location, but most homeowners can expect quotes in the range described in the FAQ below. The contractor will give you an exact, no-obligation quote during the initial call.
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Frequently Asked Questions
How do I know if I have carpenter ants or termites?
Carpenter ants are larger (¼–½ inch), black or red-and-black, with a single segmented waist and bent antennae. Subterranean termites are smaller, cream-colored, with straight antennae and no waist. Carpenter ants leave piles of sawdust-like frass; termites leave mud tubes.
How long does ant treatment take to work?
Bait-based programs typically show population reduction within 7–14 days as the bait travels back to the colony. Spray-only treatments show immediate knockdown but often see rebound within 2–4 weeks if the queen wasn't reached.
How much does ant control cost?
Most ant treatments run $150–$300 for a single visit. Carpenter ant or fire ant treatments are usually quoted higher, $250–$500, and may include a follow-up visit. Ongoing quarterly programs run $300–$500/year.
Are fire ants really that bad?
Yes. Imported red fire ants are aggressive, sting in coordinated swarms, and cause an estimated $6 billion in agricultural and medical costs annually in the US. Mound treatments require a specific protocol to avoid relocating the colony.
Why do ants keep coming back?
Usually one of three reasons — the original colony wasn't fully eliminated, there's a nearby outdoor colony that keeps sending foragers, or the home has unsealed entry points (cracks, weep holes, utility lines) that need to be addressed alongside chemical treatment.