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Cockroach Exterminator in South Pasadena, CA

Whether it's small German roaches behind an apartment stove or a large American roach climbing out of an old tub drain, the fix depends on the species and where it lives. We identify it first, then treat the hiding places directly.

About 3,600 South Pasadena homes are in buildings of five or more units, where German cockroaches can follow shared plumbing from one kitchen to the next.

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Older bathroom with a clawfoot tub and vintage hexagon tile floor, where a flashlight beam shows an American cockroach beside the exposed drain pipe

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Local office
Pest Control PESPRO — 12207 Chosen St, El Monte, CA 91733, about 7.9 miles from South Pasadena
Office phone
(323) 303-3522
Certification
QualityPro certified (National Pest Management Association)
Reputation
4.9 stars from 132 Google reviews · 15+ years in business
Hours
Mon–Fri 8AM–6PM, Sat 9AM–3PM · 24/7 emergency line

German roaches in South Pasadena apartment buildings

More than half of South Pasadena households rent, and roughly 3,600 homes are in buildings of five or more units. In these buildings, kitchens and bathrooms are often stacked so they share plumbing walls, which lets German cockroaches move between apartments through pipe openings and wall voids.

Treating a single unit can push roaches into the next one. Where possible, we inspect adjoining units, place monitors to see where activity is heaviest and set up a treatment plan with the property manager for the affected stack.

Sources: [16]

Vintage kitchens and bathrooms: drains, tile and old cabinetry

With a median build year of 1953 and historic districts full of early-1900s homes, many South Pasadena kitchens and bathrooms keep original features. Homes of this age often have built-in wood cabinets with gaps at the back, tile with missing grout, clawfoot tubs with exposed supply lines and older drain lines — all warm, damp shelter.

German cockroaches settle into cabinet corners and appliance voids; American cockroaches, the large reddish ones, usually come up from sewer lines and floor drains, especially in warm weather. We treat each where it lives and point out the openings worth sealing around pipes and drains.

Sources: [16][17]

Restaurants and shops on Mission Street and Fair Oaks Avenue

South Pasadena's restaurants and food shops cluster along corridors such as Mission Street and Fair Oaks Avenue. Food businesses here are under Los Angeles County Public Health, not the City of Pasadena's health department, so county inspection standards are the ones that apply.

For commercial kitchens we schedule service outside business hours, use products labeled for food-handling areas and leave dated service records you can show an inspector. Monitors placed at each visit show whether activity is truly falling.

Sources: [21][15]

Signs you need cockroach treatment in South Pasadena

Scattering at the light switch

Roaches running for cover when you turn on the kitchen or bathroom light at night.

Coffee-ground droppings

Fine dark specks along cabinet edges, in drawers and behind the stove.

Purse-shaped egg cases

Small brown capsules behind appliances, in hinge corners or under shelf liners.

Big roaches near drains

Large reddish-brown roaches by tubs and floor drains, a sign of sewer-line American cockroaches.

How we handle cockroach treatment in South Pasadena

1. Species and source check

We confirm which cockroach you have and where it is coming from, because German and American roaches need different treatments.

  • Kitchen, bathroom and appliance inspection
  • Drain and plumbing-wall check
  • Sticky monitors to measure activity
  • Written findings

2. Bait, regulate and treat drains

Gel bait in cracks and hinges, an insect growth regulator to stop breeding, and drain or perimeter treatment for American roaches.

  • Crack-and-crevice gel bait
  • Insect growth regulator
  • Drain and perimeter treatment
  • Bait placed where kids and pets can't reach

3. Recheck and close gaps

A return visit to read the monitors, re-bait where needed and show you which gaps around pipes and drains to seal.

  • Monitor review
  • Re-baiting as needed
  • Sealing recommendations
  • Dated service records for businesses

Pest reports in and around South Pasadena

Public-health notices, vector-control alerts and local news we track for this area. Summaries are ours; follow each link for the original report.

· San Gabriel Valley Mosquito & Vector Control District

Mosquito Control Officials Confirm First West Nile Virus Activity in Los Angeles County for 2021

The district's lab confirmed West Nile virus in a dead crow collected in South Pasadena, the first evidence of the virus in Los Angeles County in 2021.

Read the original

· NBC Los Angeles

West Nile Virus Detected in Dead Crow Found in South Pasadena

Reports the South Pasadena crow finding and notes the virus is detected every year, mosquitoes are most active May to October, and about one in five infected people develop symptoms.

Read the original

· San Gabriel Valley Mosquito & Vector Control District

West Nile Virus Activity 2021

Season tally listing South Pasadena with 11 West Nile–positive mosquito samples (first on July 19) and 4 positive dead birds (first on June 7).

Read the original

· San Gabriel Valley Mosquito & Vector Control District

West Nile Virus Activity 2022

South Pasadena again recorded 11 positive mosquito samples, the first on July 1, plus one positive dead bird on August 1.

Read the original

· California Department of Public Health

Aedes aegypti and Aedes albopictus Mosquitoes — Detections by County/City

The state's detection table marks both invasive Aedes species as present in South Pasadena.

Read the original

· The South Pasadenan

Invasive Mosquitoes Pose New Threat to South Pasadena

The vector control district warned that day-biting Aedes mosquitoes were establishing locally, can breed in a bottle cap of water, and urged a weekly ten-minute yard check.

Read the original

· Los Angeles County Department of Public Health · regional

Public Health Reports All-Time High of Flea-Borne Typhus Cases

The county counted 220 flea-borne typhus cases in 2025, up from 187 in 2024, with most patients hospitalized; it recommends year-round pet flea control and sealing wildlife out from under homes.

Read the original

Cockroach Treatment in South Pasadena: common questions

More pest control in South Pasadena

Bed Bug Treatment in South Pasadena

In a city where most households rent and many buildings share walls, one infested unit can quietly become several. We confirm bed bugs before treating, cover every life stage and come back to make sure they are gone.

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Rodent Control in South Pasadena

Roof rats in South Pasadena rarely come up from the ground — they come across from the trees. We find where branches meet your roofline, trap the rats already inside, close the openings and clean up what they left behind.

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Cockroach Treatment near South Pasadena

Sources

  1. San Gabriel Valley Mosquito & Vector Control District, “Mosquito Control Officials Confirm First West Nile Virus Activity in Los Angeles County for 2021” (2021-06-07). https://sgvmosquito.specialdistrict.org/2021-06-07-mosquito-control-officials-confirm-first-west-nile-virus-activity-in-los-angeles-county-for-2021
  2. NBC Los Angeles, “West Nile Virus Detected in Dead Crow Found in South Pasadena” (2021-06-07). https://nbclosangeles.com/news/local/west-nile-virus-detected-in-dead-crow-found-in-south-pasadena/2611805
  3. The South Pasadenan, “West Nile Virus Confirmed in Dead Crow, South Pasadena” (2021-06-15). https://southpasadenan.com/west-nile-virus-confirmed-in-dead-crow-south-pasadena/
  4. The South Pasadenan, “Bird Tests Positive for West Nile Virus in South Pasadena” (2017-09-14). https://southpasadenan.com/bird-tests-positive-for-west-nile-virus-in-south-pasadena/
  5. San Gabriel Valley Mosquito & Vector Control District, “West Nile Virus Activity 2021” (2021-10-22). https://sgvmosquito.specialdistrict.org/west-nile-virus-activity-2021
  6. San Gabriel Valley Mosquito & Vector Control District, “West Nile Virus Activity 2022” (2022). https://sgvmosquito.specialdistrict.org/west-nile-virus-activity-2022
  7. San Gabriel Valley Mosquito & Vector Control District, “West Nile Virus Activity 2023” (2023). https://sgvmosquito.specialdistrict.org/west-nile-virus-activity-2023
  8. San Gabriel Valley Mosquito & Vector Control District, “West Nile Virus Activity 2024” (2024). https://sgvmosquito.specialdistrict.org/west-nile-virus-activity-2024
  9. San Gabriel Valley Mosquito & Vector Control District, “West Nile Virus Activity 2025” (2025-11-24). https://sgvmosquito.specialdistrict.org/west-nile-virus-activity-2025
  10. California Department of Public Health, “Aedes aegypti and Aedes albopictus Mosquitoes — Detections by County/City” (2026-05-01). https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/AedesDetectionsByCountyCity.aspx
  11. The South Pasadenan, “Invasive Mosquitoes Pose New Threat to South Pasadena” (2019-06-21). https://southpasadenan.com/invasive-mosquitoes-pose-new-threat-to-south-pasadena/
  12. The South Pasadenan, “South Pasadena Joins Regional Vector Control District” (2018-06-27). https://southpasadenan.com/?p=16019
  13. The South Pasadenan, “City Honored for Mosquito Prevention Practices” (2020-03-09). https://southpasadenan.com/city-honored-for-mosquito-prevention-practices/
  14. Los Angeles County Department of Public Health, “Public Health Reports All-Time High of Flea-Borne Typhus Cases” (2026-04-02). https://lacounty.gov/2026/04/02/public-health-reports-all-time-high-of-flea-borne-typhus-cases/
  15. Los Angeles County Department of Public Health — Environmental Health, “Vending Machines in Los Angeles County — Area We Serve” (2026-10-21). https://publichealth.lacounty.gov/eh/business/vending-machines.htm
  16. US Census Bureau, American Community Survey (via Census Reporter), “South Pasadena city, CA — ACS 2020–2024 5-year estimates” (2024). https://censusreporter.org/profiles/16000US0673220-south-pasadena-ca/
  17. City of South Pasadena (hosted by the Los Angeles Conservancy), “Design Guidelines for Historic Residences” (2009-01). https://www.laconservancy.org/sites/default/files/community_documents/Design%20Guidelines%20for%20Historic%20Residences%2C%202009.pdf
  18. SoCal Landmarks, “South Pasadena Historic Districts” (2022-11-22). https://socallandmarks.com/index.php/2022/11/22/south-pasadena-historic-districts
  19. The South Pasadenan, “Two Celebrations of Trees January 24, 2019 at South Pasadena Public Library” (2019-01-24). https://southpasadenan.com/two-celebrations-of-trees-january-24-2019-at-south-pasadena-public-library/
  20. Weekend Sherpa, “Take an Urban Tree Walk Through South Pasadena” (2026-03-18). https://www.weekendsherpa.com/stories/take-an-urban-tree-walk-through-south-pasadena/
  21. Wikipedia, “South Pasadena, California” (2026-10-21). https://en.wikipedia.org/wiki/South_Pasadena,_California
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