The short version
Around Irvine, queens start nests in February or March, and colonies peak in late summer. Small, low paper wasp nests can be handled at dusk. Leave wall, ground and high nests to a pro.
- Treat nests at dusk, when wasps are home.
- Never seal a hole wasps are using.
- Ground and wall nests are best left to a pro.
- Knock down small nests early in spring.
- Call 911 for breathing trouble after a sting.
Anyone in Irvine dealing with wasps, hornets or yellowjackets at home.
What to look for
Near a door or deck, stings will happen. Wasps defend the area around their nest. Late-summer colonies are big and quick to sting.
- 1Pets pawing at their face after sniffing a lawn spot.
- 2Sudden wasp interest in overripe fruit under a tree.
- 3Wasps clustered at a hummingbird feeder or ripe grapes.
- 4Wasps flying straight lines to and from one spot.
- 5Open umbrella-shaped comb under a porch ceiling or railing.
- 6Grey, papery football-shaped nest hanging in a tree or eave.
Why it’s worth acting soon
- Nests grow all summer.
- Ground nests get disturbed by mowing.
- Wall nests can chew through into rooms.
- Stings are dangerous for anyone allergic.
Treatment options and typical costs
Inspection and Nest Identification
$75–$200
Watching flight lines at midday usually reveals the entrance. In Irvine, that step separates a quick aerial nest job from a wall-void problem that needs dust and a return visit.
- Time
- 45–75 minutes
- Best for
- Every job; species and nest location decide the method
Sealing Up After the Nest Is Dead
$150–$450
This is the step homeowners skip most often. Sealing the void after treatment keeps the next colony out.
- Time
- 1–2 hours
- Best for
- Sealing soffits, vents and gaps after a wall nest has died
Preventive Spring Treatment and Follow-Up
$150–$400
Prevention won't stop every nest, and no honest company in Irvine will say it does. It cuts the odds and catches nests that start early.
- Time
- 45–90 minutes
- Best for
- Sting allergies or repeat nest spots
Aerial Nest Treatment and Removal
$100–$400
Exposed paper wasp and hornet nests under eaves, in trees or on porch ceilings in Irvine are treated with a fast-acting aerosol or dust, then removed once the colony is dead. Most are handled in a single visit.
- Time
- 30–90 minutes
- Best for
- Exposed paper wasp, hornet and bald-faced hornet nests
Prices are typical published ranges. Ask what’s included before you compare quotes.
Once a nest is dead, screening and sealing gaps around pipes and vents keeps next year's queen from using the same opening.Which wasps live around Irvine.
Mud daubers build tube-shaped mud nests. They rarely sting. Paper wasps are the most common around Irvine. They build open, umbrella-shaped combs under eaves and railings. Western yellowjackets nest in the ground and in wall voids. They cause most stings. Bald-faced hornets build big gray nests in trees and eaves. In mild winters around Irvine, some yellowjacket nests survive and grow huge. Leave those to a pro.
Local wasps conditions in Irvine.
Knowing Irvine'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 Irvine 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. Irvine sits in a mediterranean climate, and that sets the pace for wasp activity here: mid-summer through fall (July-October). In Irvine, the area is mostly urban, so wasps 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 Irvine usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first.
Paper wasps like quiet, sheltered corners. Check garage rafters, door tracks and high shelves in spring for small starter combs.When they’re most active.
Winters around Irvine are mild, so nests can last much longer. Early spring is the easiest time to remove small starts.
Where they nest around houses here.
A ground nest looks like wasps streaming from one hole. Homes from Irvine out to Santa Ana and Huntington Beach share the same favorite nest spots. Many homes in Irvine sit on slabs, so check eaves, the garage and patio covers first. Look under railings, play sets and grills. Watch for wasps flying in and out of a gap.
A year of wasps in Irvine.
- Summer: highs near 83°F in Irvine help colonies grow fast. - Late summer: peak season. Workers hunt sweets near people. - Winter: lows near 45°F in Irvine. Some nests keep going. - Spring: queens start new nests around February or March. Knock down small starts.
Wasp, hornet or bee?
- Yellowjacket: bright yellow and black, nests in the ground. - Hornet: larger, with a big closed paper nest. - Mud dauber: thin waist, mud tube nests. Rarely stings. - Honey bee: fuzzy and golden. about relocation. - Paper wasp: slim, long legs, open comb.
If you get stung.
Move away from the nest first. Wash the sting and use a cold pack. An antihistamine can ease itching and swelling. 911 for trouble breathing or a swollen face or throat. If someone carries an epinephrine pen, use it.
Keeping wasps away from the patio.
- Trash: keep lids tight and bins away from doors. - Fruit: pick up fallen fruit. - Spring checks: knock down small nests early. - Gaps: seal gaps after a nest is gone. - Food: cover plates and drinks outdoors.
Ground nests: what to do.
Mark the hole with a flag. Keep kids and pets away. Don't mow over it. Don't pour gasoline or water in. Pros treat ground nests at night, when the colony is home.
A nest, or just visitors?
Watch at dusk, when they fly home. Follow the line back to an eave, vent, shrub or hole. Wasps on flowers or trash cans may come from far away. A nest shows steady traffic to one spot.
Treating a small nest yourself, safely.
- Never if anyone in the house is allergic. - Wait until dusk, when wasps are home and slow. - Wear long sleeves, pants and gloves. - Use a jet wasp spray from several feet away. - Never spray from a ladder. - Leave it overnight, then bag the nest. - Only if it’s small, low and out in the open.
Wasps and pets.
your vet if the throat swells or breathing changes. Keep pet food and water bowls indoors in late summer. Dogs often snap at wasps and get stung on the face. Most stings just swell a little.
Kids and wasps.
Check play sets, slides and playhouses for nests each spring. Use cups with lids for sweet drinks outside. Teach kids to walk away calmly. Swatting makes a sting more likely.
After the nest is gone.
Check nearby eaves for new starts. Knock down small new nests early next spring. Wasps don't reuse old nests. Seal the gap a wall nest used once it's quiet.
Wasps at picnics and barbecues.
- Food: keep it covered until you eat. - Trash: bag scraps and close the bin. - Calm: don’t swat; slowly move away. - Kids: teach them to walk away calmly. - Drinks: use cups with lids or straws.
Ground nests in the lawn.
Mark it, and keep mowers and kids away until it's treated. Yellowjackets often nest in old rodent holes. Watch for wasps flying in and out of the grass.
Questions to ask before you sign.
- How will you treat a nest inside the wall? - Is removal of the dead nest included? - Is a return visit included? - What kind of wasp is it?
What affects the price
- Nest height, and whether it needs a lift.
- Colony size, which climbs sharply from June to September.
- Number of nests found on the property.
- Preventive spring treatment bundled with removal.
- Distance from the company's base and travel time.
- Ground nest with multiple entrances or deep burrows.
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What's your biggest concern about wasps?
When to call for help
Call for nests in walls, attics, the ground, or anywhere high. right away if anyone in the house is allergic. Don't seal a hole wasps are using. They'll find another way in.
What you can do yourself
Knock it down the next day. Big, high or hidden nests are a job for a pro. A small, reachable paper wasp nest is a fair DIY job. Spray it at dusk with a wasp aerosol.
Wasps in Irvine
In denser parts of Irvine, nests turn up in eaves, balconies, signs and wall gaps. In Irvine, the mediterranean climate means wasps activity tends to follow mid-summer through fall (July-October). In Irvine, that timing is worth keeping in mind when you schedule a visit, because treating before the busy stretch is usually cheaper and simpler than chasing a full-blown problem later, and it leaves you more time to compare providers and their written quotes. Irvine only gets about 14 inches of rain a year, so local wasps often gather at pools, fountains and dripping taps. Winter lows near 45°F in Irvine are mild, so some yellowjacket nests survive the winter and keep growing.
Local research
Wasps in Irvine, CA: what the public record shows
Before you compare quotes, it helps to know which wasps actually live in California, when they are busiest around Irvine, and what the state figures look like. Everything below links to the agency or university page it came from.
Yellowjacket colony size (UC IPM)
A mature nest inside a wall void can hold thousands of workers.
UC Statewide IPM ProgramPaper wasp colony size (UC IPM)
Paper wasp nests under eaves are small and usually a quick single-visit job.
UC Statewide IPM ProgramWasp species recorded in California
- Western yellowjacket (Vespula pensylvanica) — UC IPM: 'the most commonly encountered species and is sometimes called the "meat bee"' in California and the Western states; ground and wall-void nester and aggressive scavenger…
- German yellowjacket (Vespula germanica) — UC IPM: 'becoming more common in many urban areas of California, where it frequently nests in houses.' Named among Ohio's three main species (German, Eastern, Common yellowjacke…
- Bald-faced hornet (Dolichovespula maculata) — Penn State: 'found in most of the 48 contiguous states and D.C., throughout Canada and in Alaska'; actually an aerial yellowjacket that builds the football-shaped gray paper nes…
- European paper wasp (Polistes dominula) — Penn State: 'first reported in 1978 around Boston', now 'coast to coast ... although they are apparently less common in the Southeast and Great Plains'; nests in 'eaves of struc…
When wasps are busiest around Irvine
Queens emerge in late winter to early spring, nests grow from spring to midsummer and peak in late summer; in coastal California south of San Francisco some yellowjacket colonies survive several years and become very large (UC IPM).
UC IPM: the western yellowjacket is the most commonly encountered species ('meat bee'); the German yellowjacket 'is becoming more common in many urban areas of California, where it frequently nests in houses.' Paper wasps (Polistes fuscatus aurifer, P. apachus, P. dominula) prefer orchards and vineyards.
Rules that apply in California
For context, nationally
- 788 — Deaths from hornet, wasp, and bee stings, 2011–2021 (US). CDC MMWR
- 72 deaths per year — Average annual sting deaths, 2011–2021 (US). CDC MMWR
Sources: Yellowjackets and Other Social Wasps (Pest Notes); CDC MMWR; Baldfaced Hornet; European Paper Wasp. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep wasps away
- Plug weep holes with mesh inserts, not solid caulk.
- Trim shrubs so nests cannot hide near walkways.
- Move hummingbird feeders away from doors and patios.
- Fill gaps in retaining walls and stacked stone.
- Mow at dawn when ground-nesting wasps are sluggish.
- Pick up fallen fruit under trees promptly.
For a nest in the ground or a wall, a pro treats the entrance and checks back to make sure the traffic has stopped before anything is sealed.Did you know?
Wasp nest paper inspired early experiments in making paper from wood
Fig wasps pollinate figs and are smaller than a rice grain
Questions people ask
Are wasps good for anything?
They eat caterpillars and other pests. Leave nests that are well away from people. Yes.
Do wasp traps work?
They catch some yellowjackets, but rarely fix a nest problem. Place them away from where people sit.
What time of day should a wasp nest be treated?
At dusk or after dark, when they're home and calm.
Wasp or bee: does it matter?
Bees are fuzzy and rounder. It matters because honey bees can often be relocated. Wasps are smooth and narrow-waisted.
Why are there suddenly so many wasps in late summer?
Colonies are at their biggest by late summer. Food gets scarce, so workers hunt sweets and protein near people.
When is wasp season in Irvine?
Mild winters let some nests keep going.
Are hornets common in Irvine?
Bald-faced hornets are, in trees and on eaves. Most stings come from yellowjackets, though.
Nearby cities
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Sources (9)
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 Wasp Exterminator · Updated September 11, 2026 · How we write these guides