Rodent Management
Rodent Control in Foster City, CA
101 Exterminators does rodent control in Foster City exclusion-first: we find the openings, seal them, then trap. Roof rats (Rattus rattus) are the species behind most calls here, moving along the lagoon banks, the levee trail plantings, and the tract street trees that have had fifty years to reach the rooflines they were planted beside. We are California licensed, SPCB Lic. #9119, and have worked San Mateo County.
Home maintenance
How do you keep rats out of a Foster City home?
Take away food and cover, and close the roof. Foster City has no creeks or wild hillsides, so roof rats here live in the ornamental trees, ivy and palms of the landscaped neighborhoods and travel along fences, utility lines and shared rooflines. Keeping the landscaping trimmed back from the house and the attic sealed removes most of what draws them.
Trim trees and palms back from the roof
Cut branches several feet back from rooflines and clean dead fronds out of palms near the house. Roof rats use overhanging limbs to reach the eaves of single-family homes and townhome rows.
Thin ivy and dense ground cover
Ivy on fences and thick ground cover give roof rats shelter and nesting space near the house. Thin it out, keep it off walls, and leave a clear strip along the foundation.
Close openings with metal
Rats fit through gaps about half an inch wide. Seal openings at roof vents, eaves, pipe and wire entries and garage door edges with metal mesh, flashing or mortar.
Keep food and water out of reach
Bring pet food in at night, pick up fallen fruit, keep lids on garbage and compost, and don’t leave birdseed on the ground. Fix dripping hose bibs that give rats water.
Coordinate with your HOA
Townhome rows share roofs and walls, so one unit’s gap can let rats into the next. Report sightings to the association so it can check common areas, landscaping and shared rooflines.
When to do it
Trim trees and seal openings in late summer and fall, before rats move into attics for the rainy season.
Maintenance guidance: San Mateo County Mosquito and Vector Control District, Rodent prevention and control
Warning Signs
When to Ask About Rodent Control in Foster City
Our program combines three components: (1) Exclusion — sealing gaps in foundations, pipe penetrations, vents, and roof eaves using hardware cloth, copper mesh, foam sealant, and sheet metal as appropriate. (2) Trapping — placement and monitoring of snap traps, live traps, and glue boards in active areas. (3) Exterior bait stations — tamper-resistant bait stations positioned along perimeter rodent runways for ongoing population management.
Droppings along walls, in cabinets, behind appliances, or in attic insulation
Gnaw marks on wiring, wood, plastic pipes, or food packaging
Grease marks along walls or baseboards — oil from rodent fur rubbed repeatedly on surfaces
Nesting materials (shredded paper, insulation, fabric) in hidden locations
Scratching or scurrying sounds in walls, ceilings, or under floors at night
Burrows in landscaping, mulch beds, or under concrete slabs
Citrus or avocado fruits with bite marks — a classic roof rat indicator
Pet acting alert at walls or cabinets when no visible cause exists
How It Works
What to Expect from Rodent Control in Foster City
Tell us where you hear activity or find droppings, and whether you can see a possible entry point. We can then plan where to check first.
Inspection & Runway Mapping
We identify gnaw marks, runways, burrows, droppings, and grease trails to map rodent activity throughout the property — interior and exterior.
Exclusion
We seal all discovered entry points with durable materials appropriate to the opening — hardware cloth, copper mesh, sheet metal flashing, or foam sealant for smaller gaps.
Trapping & Bait Placement
Interior snap traps and exterior tamper-resistant bait stations are positioned along active runways. We monitor and service these on a schedule until activity ceases.
Follow-Up & Monitoring
We return to clear traps, replenish bait, check exclusion work, and confirm that the population has been eliminated before closing out the service.
Why 101 Exterminators
Why Choose 101 Exterminators for Rodent Control in Foster City
Exclusion-First Methodology
Without sealing entry points, any rodent removed will simply be replaced by another. We seal the structure before or concurrent with trapping — not as an afterthought.
No Unmonitored Poison Bait Indoors
We do not place loose rodenticide indoors where rodents can carry it to walls and die inaccessibly. Interior work uses traps with daily monitoring during active treatment.
Regional Species Knowledge
Norway rats, roof rats, and deer mice behave differently and require different approaches. We identify the species present before selecting treatment methods.
Sanitation Recommendations
After resolving an infestation, we advise on harborage removal, vegetation management, and food storage to prevent reinfestation — not just a repeat service call.
Common Questions
Rodent Control FAQs for Foster City
Why do I hear rats in the attic in Foster City when there are no creeks or fields nearby?
Because the local species travels above ground. Roof rats (Rattus rattus) use lagoon-bank landscaping, levee trail plantings, fence lines, and the mature tract trees now overhanging 1970s roofs, then enter at the stucco-to-fascia seam, a corroded eave vent, or a plumbing boot. Cutting branches back off the roofline and closing those openings does more than trapping alone ever will, because it removes both the road and the door.
Can rodent work be done near the Foster City levee without harming marsh wildlife?
Yes, and it changes the approach. The Bay side of the levee and the Belmont Slough edge are habitat for protected species including the salt marsh harvest mouse and Ridgway's rail, so we rely on exclusion and trapping there and keep any exterior rodenticide in tamper-resistant stations placed against the building, away from the marsh boundary. Sealing the structure is the part that holds anyway, since bait on its own does nothing about the opening the next rat uses.
One unit in our Foster City townhome complex has rats — do neighbors need service too?
In attached housing, nearly always. Townhome and condo rows here share roof planes and soffits, so rodents entering above one unit move through framing to the next. We inspect and seal at the building level and coordinate with the HOA so the exclusion line is continuous. Sealing one unit while the adjacent roofline stays open simply relocates the activity a few feet down the row.
Local Pest Pressure
Common Pests We Treat in Foster City
Every area has its own pest profile shaped by climate, housing, and geography. These are the pests we see and treat most often in Foster City — tap any one to learn how to identify it and what treatment involves.
Rodent Control · Foster City
Schedule Service in Foster City
Tell us what you have found and where. If you're new to us, start a recurring plan and we'll take 10% off your first service.