Cockroach Elimination
Cockroach Control in South San Francisco, CA
101 Exterminators does cockroach control in South San Francisco for homes, restaurant kitchens and multi-unit buildings, California licensed under SPCB Lic. #9119 since 2005. German cockroaches (Blattella germanica) arrive on deliveries, in packaging and inside used appliances, then spread through shared plumbing walls — none of which says anything about the household. We find the harborage, bait it, and come back to confirm the population dropped.
Warning Signs
Signs You Need Cockroaches Service in South San Francisco
Species-specific treatment using gel baits, insect growth regulators (IGRs), and targeted void treatments. Gel bait is placed directly at harborage sites — behind refrigerators, under sinks, inside wall voids — where cockroaches consume and transfer it to others in the colony. IGRs prevent juvenile cockroaches from reaching reproductive maturity, collapsing the population within 2–4 weeks. Commercial kitchen programs include written documentation of conducive conditions for health inspection compliance.
Live cockroaches seen during the day — indicates a large infestation overflowing harborage sites
Cockroach droppings (small, dark, pepper-like pellets) under sinks, behind appliances, or in cabinets
Egg cases (oothecae) — small, brown, capsule-shaped casings — in sheltered areas
Musty or oily odor in kitchen, bathroom, or utility areas
Shed cockroach skins near harborage sites
Cockroach activity visible in commercial kitchen equipment, drain areas, or food storage
How It Works
Our Cockroaches Process in South San Francisco
Every job follows the same methodical approach — no shortcuts, no guesswork. Here is what to expect when you work with us in South San Francisco.
Inspection & Species ID
We identify the cockroach species and locate all harborage sites — behind refrigerators, under sinks, inside wall voids, and in any warm, dark area near moisture or food. Species identification determines the correct bait and treatment approach.
Bait Application
Gel bait is placed at harborage sites in quantities cockroaches will find and consume. Bait is formulated to be transferred between individuals — a single fed cockroach will infect others in the colony, reaching the full population.
IGR Treatment
Insect Growth Regulators (IGRs) prevent juvenile cockroaches from reaching reproductive maturity, collapsing the population within 2–4 weeks even without direct contact with adults.
Exclusion & Prevention
We identify and seal gaps around plumbing penetrations, appliances, and wall voids that provide harborage. For commercial kitchens, we provide a written report of conducive conditions for health inspection compliance.
Why 101 Exterminators
Cockroaches You Can Count On in South San Francisco
Bait-Based Treatment
Gel bait reaches cockroaches that surface sprays cannot — inside appliances, wall voids, and harborage sites that sprays would scatter.
Health Inspection Ready
Our commercial cockroach programs are documented and meet California health department expectations for food-handling facilities.
IGR Included
Insect Growth Regulators prevent resistant survivors from reproducing, ensuring the population collapses rather than rebounds.
No Surface Spray Scattering
Broad spray applications push cockroaches into new harborage areas. Our targeted approach eliminates colonies in place.
Common Questions
Cockroach Control FAQs for South San Francisco
Does having cockroaches mean our South San Francisco apartment is dirty?
No. German cockroaches are carried in — on cardboard, in a grocery delivery, inside a used appliance, or from a neighboring unit through a shared plumbing chase — and they establish readily in a spotless kitchen that has warmth and water. Sanitation affects how fast a population grows once it is there, which is a separate question from how it arrived. Reporting it early is what keeps the job small.
The roaches in our South San Francisco garage look nothing like the ones in the kitchen — why?
They are probably two species that need two different treatments. German cockroaches are small and tan with two dark stripes behind the head, and they stay indoors near warmth and water. Oriental cockroaches are larger, dark and glossy, live outdoors in drains, meter vaults and damp sub-areas, and enter at ground level through a garage door gap or a floor drain. One calls for interior baiting; the other calls for exclusion and moisture correction.
Our downtown building treated one unit and the roaches came back — what went wrong?
The population was probably never confined to that unit. In the stacked construction common off Grand Avenue and Linden Avenue, German cockroaches move through shared plumbing chases, wall voids and conduit, so treating the unit that complained leaves the source next door or one floor down. Effective work means inspecting and treating the adjacent units at the same time and documenting each one. Building-level coordination is the only version of this that holds.
Local Pest Pressure
Common Pests We Treat in South San Francisco
Every area has its own pest profile shaped by climate, housing, and geography. These are the pests we see and treat most often in South San Francisco — tap any one to learn how to identify it and what treatment involves.
Cockroach Control · South San Francisco
Free Pest Evaluation in South San Francisco
CA licensed and insured. Written estimate before any work begins. Urgent situations in South San Francisco are prioritized.