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Wasps and hornets sting repeatedly, triggering mass attacks.
Anaphylaxis from stings can be life-threatening.
Wasps nest inside walls, attics, eaves, and underground.
Nests can grow to thousands of insects in one summer.
Six species ATCO technicians handle throughout the Bay Area — each requires a different removal approach.
Yellow jackets, paper wasps, and hornets build nests quickly in eaves, attics, and fences. Don't wait for a sting — ATCO removes active nests safely and treats for return activity.
Call us: (415) 742-2826 · Or use the coupon to schedule online.
ATCO Pest Control — Bay Area
Diamond Certified
Since 2009
Ensure all children and pets stay inside and away from the treatment area during the entire service visit.
Mark every nest location you've found so the technician can address them all in one visit.
Don't spray, poke, or attempt to remove nests. Disturbing them makes insects more aggressive and treatment harder.
Shut all windows and doors near nest locations to prevent displaced insects from entering your home.
Bring in pet food bowls, water dishes, and bird feeders from the treatment area before the technician arrives.
If you need to be outside, wear light colors. Stinging insects are more attracted to dark colors and floral patterns.
Tap a card to learn what it means for your family — and what ATCO does about it.
A colony that starts with one queen in spring reaches 4,000+ workers by August — all primed to defend aggressively when disturbed.
Schedule ConsultationStinging insects kill more Americans than snakes annually. For allergy sufferers, a nest near your home is a medical emergency.
Schedule ConsultationDisturbing a ground nest while mowing triggers a defensive swarm within 30 seconds. Don't spray — step back and call ATCO.
Schedule ConsultationA wall cavity honeybee colony holds 80,000 bees and 100+ lbs of honey. ATCO works with licensed beekeepers for responsible relocation.
Schedule ConsultationSpraying inside a wall void agitates and traps thousands of stinging insects. Professional nest removal is the only responsible option.
Schedule ConsultationActive stinging insect nests near your home are a safety emergency. We offer same-day response — especially urgent with children or pets.
Schedule ConsultationWatch for a steady stream of insects flying to and from one spot, especially under eaves, in wall voids, or underground holes. Buzzing sounds inside walls or ceilings and chewed wood shavings (carpenter bees) are also telltale signs of an active nest on your property.
Open trash cans, sugary drinks, ripe fruit, pet food, and exposed meat draw yellow jackets and wasps to outdoor areas. Flowering gardens near doorways, standing water, and untreated wood structures also invite bees and wasps to set up nests close to your home.
Wasp and hornet stings can cause severe allergic reactions, including anaphylaxis, which requires immediate medical attention. Even without an allergy, multiple stings from a disturbed nest can lead to serious swelling, pain, and in rare cases, organ damage — making professional removal essential.
Call a pro if the nest is in a wall void, attic, or underground — or if it's larger than a baseball. DIY removal of established nests triggers mass stinging responses. Professionals have protective equipment and targeted treatments that eliminate the colony without putting your family at risk.
Wasps and yellow jackets are most aggressive in late summer and early fall when colonies peak in size and natural food sources decline. Spring is the best time to spot and remove small starter nests before they grow into large, dangerous colonies with thousands of insects.
Seal gaps around eaves, soffits, and siding in early spring before queens start nesting. Ask about ATCO's queen trapping program — deployed February through April to intercept wasp and yellow jacket queens before they establish colonies. Keep outdoor trash covered, avoid leaving food or drinks uncovered at barbecues, and treat exposed wood to deter carpenter bees.
Keep garbage cans tightly sealed. Wasps and yellow jackets are drawn to sugary drinks, meats, and food scraps in open bins.
Inspect for gaps around eaves, soffits, and siding. Seal cracks where wasps might build nests inside walls or attics.
Keep flowering plants away from doorways and seating areas. Plant bee-attracting flowers in a far corner of your yard instead.
Check eaves, overhangs, and sheds for small nests in early spring. Small colonies are much easier for professionals to remove.
At barbecues and picnics, keep food covered and use cups with lids. Yellow jackets are drawn to sugary drinks and ripe fruit.
Bright or floral-patterned clothing can attract bees that mistake you for a flower. Stick to neutral tones and skip strong perfumes outdoors.
Hitting a nest triggers a mass attack. Wasps release alarm pheromones that signal the entire colony to defend — resulting in dozens of stings.
OTC wasp sprays rarely reach the queen deep inside the nest. The colony rebuilds, and you've made them more aggressive.
Burning or flooding a nest is extremely dangerous. It rarely works and can cause property damage or drive insects deeper into walls.
Honeybees are essential pollinators protected in many areas. Contact a professional who can relocate them to a beekeeper instead.
Important Warning
Wasps release attack pheromones when disturbed—never attempt DIY removal.
We find every nest, including hidden colonies.
We identify the exact species — honeybees, yellow jackets, hornets, wasps — because each requires a different treatment approach.
We treat the colony at dusk when all insects are home, using the most effective method for the species — including queen trapping for preventative control in early spring.
We physically remove the nest structure. Honeybee colonies are humanely relocated to local beekeepers rather than destroyed.
We seal entry points and apply deterrents to prevent re-nesting.
In early spring, queen yellow jackets and wasps emerge from overwintering to find nesting sites. ATCO deploys queen traps before colonies establish — intercepting queens before they can build a nest and recruit thousands of workers. One queen trapped in March eliminates a colony that could have housed 5,000+ insects by August.
Queen trapping is most effective February–April and is offered as part of our preventative stinging insect program. Ask your technician about adding it to your service plan.
Relocated colonies continue pollinating gardens and producing local honey.
We relocate honeybee colonies to local beekeepers whenever possible.
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