The short version
Around San Diego, 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.
Homeowners and renters in San Diego with a nest near a door, deck or play area.
What to look for
Near a door or deck, stings will happen. Late-summer colonies are big and quick to sting. Wasps defend the area around their nest.
- 1Buzzing audible through a ceiling or wall on warm afternoons.
- 2Wasps clustered at a hummingbird feeder or ripe grapes.
- 3Wasps hovering at a mulch bed or retaining wall gap.
- 4Chewed, scarred wood on fences, decks or cedar siding.
- 5Wasps flying straight lines to and from one spot.
- 6Wasps entering an attic vent, dryer vent or weep hole.
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
Not every buzzing insect is a wasp. Not every wasp is a threat. A careful look separates a lone paper wasp from a yellowjacket colony in San Diego.
- Time
- 45–75 minutes
- Best for
- Every job; species and nest location decide the method
Aerial Nest Treatment and Removal
$100–$400
A treated nest should go quiet within a day. A few stragglers are normal. Ask whether removal and a follow-up check are included.
- Time
- 30–90 minutes
- Best for
- Exposed paper wasp, hornet and bald-faced hornet nests
Preventive Spring Treatment and Follow-Up
$150–$400
Preventive work makes the most sense for San Diego homes that have had nests two years running, or where someone has a sting allergy. It is a modest cost compared with a wall-void job.
- Time
- 45–90 minutes
- Best for
- Sting allergies or repeat nest spots
Ground and Wall-Void Nest Treatment
$150–$500
Never seal a live void nest. Plugging the hole too early can drive wasps into the house.
- Time
- 30–60 minutes plus a return visit
- Best for
- Yellowjackets in lawns, retaining walls, soffits and wall voids
Prices are typical published ranges. Ask what’s included before you compare quotes.
Yellowjackets often nest in old rodent holes and gaps in garden walls. Watch for wasps flying low and steady into one spot.Which wasps live around San Diego.
Paper wasps are the most common around San Diego. 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 San Diego, some yellowjacket nests survive and grow huge. Leave those to a pro. Mud daubers build tube-shaped mud nests. They rarely sting.
Local wasps conditions in San Diego.
San Diego sits in a mediterranean climate, and that sets the pace for wasp activity here: mid-summer through fall (July-October). In San Diego, 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 San Diego usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing San Diego'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 San Diego 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.
An unscreened foundation vent is an easy way in for a yellowjacket queen. Wasps flying in and out of a vent all day are a sign of a nest inside.When they’re most active.
Winters around San Diego are mild, so nests can last much longer. Early spring is the easiest time to remove small starts.
Where they nest around houses here.
Many homes in San Diego 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 ground nest looks like wasps streaming from one hole. Homes from San Diego out to Chula Vista share the same favorite nest spots.
A year of wasps in San Diego.
- Spring: queens start new nests around February or March. Knock down small starts. - Summer: highs near 76°F in San Diego help colonies grow fast. - Late summer: peak season. Workers hunt sweets near people. - Winter: lows near 49°F in San Diego. Some nests keep going.
Wasp, hornet or bee?
- Paper wasp: slim, long legs, open comb. - 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.
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.
- Food: cover plates and drinks outdoors. - 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.
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?
Wasps on flowers or trash cans may come from far away. A nest shows steady traffic to one spot. Watch at dusk, when they fly home. Follow the line back to an eave, vent, shrub or hole.
Treating a small nest yourself, safely.
- Only if it’s small, low and out in the open. - 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.
Wasps and pets.
Dogs often snap at wasps and get stung on the face. Most stings just swell a little. your vet if the throat swells or breathing changes. Keep pet food and water bowls indoors in late summer.
Kids and wasps.
Teach kids to walk away calmly. Swatting makes a sting more likely. Check play sets, slides and playhouses for nests each spring. Use cups with lids for sweet drinks outside.
After the nest is gone.
Wasps don't reuse old nests. Seal the gap a wall nest used once it's quiet. Check nearby eaves for new starts. Knock down small new nests early next spring.
Wasps at picnics and barbecues.
- Drinks: use cups with lids or straws. - 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.
Ground nests in the lawn.
Yellowjackets often nest in old rodent holes. Watch for wasps flying in and out of the grass. Mark it, and keep mowers and kids away until it's treated.
Questions to ask before you sign.
- What kind of wasp is it? - How will you treat a nest inside the wall? - Is removal of the dead nest included? - Is a return visit included?
What affects the price
- Return visit to confirm a void nest is dead.
- Local labor rates and seasonal demand.
- Number of nests found on the property.
- Distance from the company's base and travel time.
- Ground nest with multiple entrances or deep burrows.
- After-hours, weekend or emergency scheduling.
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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 San Diego
San Diego only gets about 10 inches of rain a year, so local wasps often gather at pools, fountains and dripping taps. Winter lows near 49°F in San Diego are mild, so some yellowjacket nests survive the winter and keep growing. In denser parts of San Diego, nests turn up in eaves, balconies, signs and wall gaps.
Local research
Wasps in San Diego, 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 San Diego, 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 San Diego
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
- Fix leaking drip emitters, hose bibs, and irrigation valves, the main draw in a 10 inch rainfall climate.
- Screen attic vents, foundation vents, and gaps at the roof to wall junction with fine mesh.
- Inspect eaves, rails, and patio covers in February, when a queen is still working alone.
- Keep outdoor bins closed and rinsed, since western yellowjackets scavenge both protein and sugar.
- Cover drinks and clear plates quickly at outdoor tables rather than letting them sit.
- Watch known nest sites through winter here, because activity does not automatically stop.
- Seal stucco cracks and tile edge gaps once a colony has been confirmed dead.
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?
Fig wasps pollinate figs and are smaller than a rice grain
Mud daubers stock their nests with paralyzed spiders
Questions people ask
Wasp or bee: does it matter?
Wasps are smooth and narrow-waisted. Bees are fuzzy and rounder. It matters because honey bees can often be relocated.
Will wasps come back to the same nest next year?
They don't reuse old nests. New queens often pick the same sheltered spots, though.
Are wasps dangerous to my pets?
They can be. Dogs often get stung on the face. your vet if swelling spreads or breathing changes.
Can wasps damage my house?
Rarely by much. Yellowjackets in walls can chew through drywall. Carpenter bees do more wood damage.
What should I do if I get stung?
An antihistamine helps with itching. 911 for trouble breathing or a swelling throat.
Is it safe to remove a wasp nest yourself?
In San Diego, a small, exposed nest can be treated at dusk with the right spray and protective clothing. Anyone allergic to stings should never try.
When is wasp season in San Diego?
Mild winters let some nests keep going.
Are hornets common in San Diego?
Bald-faced hornets are, in trees and on eaves. Most stings come from yellowjackets, though.
Nearby cities
Related guides
Sources (15)
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