Quick answer
Getting rid of ants means killing the colony, not just the ants you see. Here’s what works:
- Identify the ant — size, color, and where you see them change the fix.
- Follow the trail to find where they’re getting in.
- Use slow-acting ant bait near the trail instead of spray, so workers carry it back to the queen.
- Take away food and water, then wipe the trail with soapy water once activity drops.
- Seal the entry point and trim plants that touch the house.
If you see large black ants (¼ inch or bigger) indoors in late winter or spring, find sawdust-like debris, or ants keep coming back after baiting, call a professional — it may be carpenter ants.
Which Ant Is It? The Three Most Common in Chicagoland Homes
Most ant calls in the Chicago suburbs come down to three species, and each one needs a slightly different approach.
| Odorous house ant | Pavement ant | Carpenter ant | |
|---|---|---|---|
| Size | About ⅛ inch | About ⅛ inch | ¼–½ inch |
| Look | Dark brown to black; smells like rotten coconut when crushed | Dark brown to black, fine grooves on the head and back | Large, black or red-and-black |
| Where you see them | Kitchens and bathrooms, along counters and windows — often after rain | Along foundations, garage floors and sidewalks; small soil piles in pavement cracks | Kitchens and damp areas, around windows, doors and decks |
| Where they nest | Under mulch, stones and siding outside; in wall voids near moisture inside | In soil under slabs, driveways and stones | In damp or damaged wood — window frames, porches, wall voids |
| Main concern | Nuisance; contaminate food | Nuisance | Wood damage — they hollow out wood (they don’t eat it) |
| Main fix | Sweet baits + sealing | Baits along cracks + sealing | Find the nest and moisture — call a pro |
Not sure? Size is the quickest clue: if the ants are noticeably bigger than a grain of rice, treat it as a possible carpenter ant problem.
Not sure which ant you have? Text a photo — a licensed technician will identify it for free.
Text a Photo — Free Ant IDNo obligation to book. Or call (708) 907-1872
How Bad Is Your Ant Problem?
The ants on your counter are only the foragers. Most of the colony — including the queen — stays in the nest. Tick everything that applies:
30-second ant check
Why Ants Show Up in Chicagoland Homes Every Spring
- Spring wakes colonies up. As the soil warms in April and May, colonies become active and send workers looking for food and water — often right into your kitchen.
- Rain pushes them inside. Heavy spring rain floods outdoor nests. Odorous house ants are known for moving indoors after a storm.
- Cracks and gaps are everywhere. Pavement ants come up through cracks in basement slabs and garage floors; others follow pipes, wires and window frames.
- Moisture attracts carpenter ants. Leaky gutters, ice dams and wet window frames soften wood, which is exactly where carpenter ants like to nest.
Step-by-Step: How to Get Rid of Ants Yourself
For a small, recent ant problem, this plan often works. The key is patience: baits take a few days, and spraying in the meantime undoes them.
Follow the Trail
Watch where the ants come and go. The trail leads to the entry point and points toward the nest. Don’t wipe it out yet — you’ll use it to place bait.
Take Away What They Want
Wipe counters, store sweets and pantry food in sealed containers, rinse recyclables, fix drips under sinks, and don’t leave pet food out overnight.
Bait Instead of Spray
Place slow-acting ant bait stations or gel next to the trail and entry point. Many house ants prefer sweet baits; if they ignore it, try a protein or grease bait. Seeing more ants at the bait for a day or two means it’s working.
Wait 3–7 Days
Let workers carry the bait back to the nest. Don’t spray or clean the bait area in the meantime, and replace bait once it’s gone.
Clean the Trail and Seal
Once activity drops, wipe the trail with soapy water to remove the scent path. Caulk the entry crack around windows, baseboards, pipes and slab cracks.
Fix the Outside
Trim shrubs and branches touching the house, pull mulch a few inches back from the foundation, and fix leaking gutters and downspouts.
Always read and follow the product label. Use enclosed bait stations or place gel where children and pets can’t reach it.
Ants coming out of the walls? A licensed tech can find the nest.
Get a Free Quote — We Call Back in 15 MinOr call (708) 907-1872 · Mon–Fri 8–5, Sat 9–12
What Not to Do (These Make It Worse)
- Spraying the ants you see. Repellent sprays kill foragers but leave the queen. With odorous house ants, it can even split one colony into several new nests.
- Spraying near your bait. It contaminates the bait so ants won’t carry it back.
- Relying on vinegar, cinnamon or chalk lines. They may break up a trail for a day, but they don’t affect the nest.
- Ignoring large black ants. Carpenter ants usually point to moisture and damaged wood that gets worse over time.
- Using several products at once. Mixing sprays, dusts and baits in the same spot usually means none of them work well.
Why DIY Ant Control Often Fails
- The queen is never reached. Sprays and wiping kill workers; the colony simply replaces them.
- Wrong bait. Ants switch between sugar and protein depending on the season, so a bait they ignore does nothing.
- More than one nest. Some species have many queens and satellite nests in walls and under the slab.
- It’s carpenter ants. They need the nest and the moisture problem found, which store products don’t do.
When to call a professional: you see large black ants or sawdust-like debris, ants keep coming after two weeks of baiting, ants come out of walls or outlets, you find winged ants indoors, or the same problem returns every spring.
DIY vs. Professional: What It Costs in Chicagoland
Store-bought baits are the cheapest place to start for a small, recent problem — but there’s no guarantee, and the wrong bait or a hidden nest means the ants keep coming.
EcoWall ant control: a one-time treatment from $219 (30-day re-treatment guarantee), or Quarterly Protection from $49/month, which covers ants and other common pests year-round with a 90-day guarantee. Exact price is confirmed on-site before work begins — see what’s included.
What to Expect From a Professional Treatment
- Inspection: the technician identifies the species and traces trails back to nests and entry points.
- Targeted treatment: professional baits and non-repellent products that ants carry back to the colony.
- Exterior barrier: treatment around the foundation and entry points to stop new ants coming in.
- Results: activity usually drops within 24–48 hours, with the colony gone in about 1–2 weeks.
How to Keep Ants From Coming Back
- Store sweets, pantry food and pet food in sealed containers
- Wipe counters and sweep floors, especially around the sink
- Fix leaks under sinks and around the dishwasher
- Caulk gaps around windows, baseboards and pipes
- Trim plants and branches touching the house
- Keep mulch a few inches away from the foundation
- Clean gutters and repair any wet or damaged wood
- Keep firewood off the ground and away from the house
Ant Control FAQ
Why do ants keep coming back after I spray?
Spray kills the workers you see, but the queen and most of the colony stay safe in the nest. The colony replaces the workers within days. Some species, like odorous house ants, can even split into several new nests when disturbed. Slow-acting baits that workers carry back to the nest are what end the colony.
How can I tell if I have carpenter ants?
Carpenter ants are large — about ¼ to ½ inch — and black or red-and-black. Warning signs are ants indoors in late winter or early spring, small piles of sawdust-like debris, winged ants inside, or faint rustling in walls. They hollow out damp wood to nest (they don’t eat it), so the damage grows over time.
Why are there ants in my house after it rains?
Heavy rain floods outdoor nests, so ants move to higher, drier ground — often inside your home. Odorous house ants are especially known for this. Sealing entry points and fixing moisture around the foundation helps.
Are ant baits safe around kids and pets?
Enclosed bait stations are designed to keep bait away from children and pets. Place them behind appliances or inside cabinets, and always follow the product label. Our technicians place professional baits in cracks and areas kids and pets can’t reach.
How long does it take to get rid of ants?
With baits, activity often drops within a few days, and the colony is usually gone in about 1–2 weeks. Carpenter ants and multi-nest colonies can take longer and usually need a professional treatment.
Do ants go away in winter?
Outdoor colonies go dormant in Chicagoland winters. If you see ants indoors in winter, it often means the nest is inside the heated part of your home — especially with carpenter ants — and it’s worth having it inspected.
How much does ant control cost in Chicagoland?
At EcoWall Pest Control, a one-time ant treatment starts at $219, and Quarterly Protection starts at $49/month. The exact price is confirmed on-site before any work begins.
Ant Control Near You
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