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Pest control in California
What are the most common pests in this state, and who handles them?
Pest control in California changes by region: Argentine ants drive the most calls, drywood termites hit coastal homes and often need fumigation, and bed bugs concentrate in dense multi-unit housing in Los Angeles and San Francisco. PestChief's free match pairs a California homeowner with one independent local company by ZIP code.
Where can you read about each pest?
Pest pressure here is shaped by climate, geography and housing stock, so it varies across the state. The notable issues for this state are set out on this page. For how each pest is identified, what the signs look like and what treatment usually involves, read the pest guides.
What is the climate like here?
Climate is the biggest single driver of which pests live here and how long their season runs.
Which pest issues stand out here?
- Argentine ants, which form large interconnected colonies and are the state's most common ant call
- Drywood termites in coastal and southern California, often treated locally or by fumigation
- Roof rats in citrus, palm and ivy landscaping across southern California
- Black widow spiders in garages, block walls and irrigation boxes
- Bed bug pressure in dense multi-unit housing in Los Angeles, San Francisco and San Diego
Which pests are active in each season?
Activity shifts through the year, so the pest worth treating in March is rarely the one worth treating in August.
Which pests are active in spring?
Which pests are active in summer?
Which pests are active in fall?
Which pests are active in winter?
How does pest pressure vary by region?
Pest pressure is not uniform across a state. Elevation, humidity, soil and the age of the housing stock all change which pests appear and when.
Which regions of the state face which pests?
When do termites swarm in each region?
Is your ZIP code in California covered?
PestChief is free to the homeowner. Coverage is checked ZIP code by ZIP code, not state by state. Give your ZIP code and the pest you are seeing, and if an independent local pest control company covers that ZIP code and handles that pest, your request goes to that one company, and it contacts you directly.
What licensing should you ask a company for?
Licensing is the one check a homeowner can make before any work starts. Every state requires a pest control company to hold a license, and most require a separate certification for specialty work such as termite treatment. Ask for the license number, confirm it covers the pest you have, and check it with the state agency that issues it.
What does this state require of a licensed company?
What else should you know about this state?
A few state specific details that change how pest control works here, and what they mean for a homeowner.
Which metro areas are covered?
Coverage varies inside a state, not only between states. A company that covers one metro area may not cover a rural ZIP code two counties away, and the pests it is licensed to treat can differ as well. The metro areas listed here are where PestChief most often has a company to introduce you to. If your city is not listed, a ZIP code check is still worth doing.
What do homeowners ask most?
What pests are most common in California?
California's most frequent pest calls are ants, cockroaches, spiders, wasps and hornets, termites and rodents, with sharp regional differences:
- Argentine ants, which form large interconnected colonies and are the state's most common ant call
- Drywood termites in coastal and southern California, often treated locally or by fumigation
- Roof rats in citrus, palm and ivy landscaping across southern California
- Black widow spiders in garages, block walls and irrigation boxes
- Bed bug pressure in dense multi-unit housing in Los Angeles, San Francisco and San Diego
When is pest season in California?
Pest season in California never fully closes, and the winter rains are as much a trigger as the summer heat.
Spring: Argentine ant trails surge indoors; subterranean termites swarm in the valleys. Summer: Roof rat and cockroach activity climbs; drywood termite swarms begin late summer. Fall: Spiders mature and wander; rodents move indoors as rains begin. Winter: Winter rains drive ants and rodents inside, especially along the coast.
Who licenses pest control companies in California?
Structural pest control in California is licensed by the Structural Pest Control Board within the California Department of Consumer Affairs, with separate branch licenses for fumigation, general pest and termite work. Ask which branch license the company holds and match it to your problem.
How much does pest control cost in California?
Across California call types, national estimates run about $171 (This Old House) for a single visit, $300 to $550 (HomeAdvisor) for a one time treatment program, and $300 to $900 (HomeGuide) a year on a recurring plan. Fumigation is quoted separately after inspection. These are published industry figures, not PestChief quotes.
Why do some California termite jobs require fumigation?
Drywood termites in coastal and southern California are treated either locally or by whole-structure fumigation, depending on the infestation, and their swarms begin in late summer. California licenses fumigation work as a separate branch under the Structural Pest Control Board, so for a tenting job, ask specifically which branch license the company holds before work is scheduled.
Does PestChief cover California?
Independent local companies cover ZIP codes in many parts of California: Los Angeles, San Diego, San Francisco, San Jose, Sacramento and Riverside-San Bernardino are the covered metros. Coverage is decided ZIP code by ZIP code, not statewide, so the locations finder is the check that matters. PestChief passes a covered request to one company that handles the pest; that company then contacts you directly.
Where does this information come from?
Seasonality and pest biology
- US EPA, Integrated Pest Management principles
- UC Statewide IPM Program, Home and Landscape pests
- US EPA, Safe Pest Control
- Penn State Extension
Pricing
National estimates from published industry sources. Not PestChief quotes.
Licensing
Licensing is administered by Structural Pest Control Board within the California Department of Consumer Affairs.
Ready to get this handled?
It costs the homeowner nothing. Coverage is checked ZIP code by ZIP code. Give your ZIP code and the pest you are seeing, and if an independent local pest control company covers that ZIP code and handles that pest, your request goes to that one company. It contacts you directly, and it sets its own price.
What should you check before you hire?
Every state we cover
Browse the full list of states and metro areas, and check whether your area is covered.
Pests, one by one
Identification, signs of an infestation and what to do first, for each pest we cover.
What pest control costs
National ranges by treatment type, with the basis for each figure stated plainly.
Season by season
Which pests get active when, and the months worth acting in before a problem grows.
Learn the basics
Plain explanations of treatments, prevention and the questions worth asking a company.
How PestChief works
We match a homeowner with one independent local pest control company. Here is what happens.