A peaceful Central California residential street lined with single-family homes — Los Altos, California service area

Rodent Management

Rodent Control in Los Altos, CA

Name: 101 Exterminators Inc.
Address: 635 Sanborn Pl Ste 12, Salinas, CA, 93901, US
Telephone: (831) 500-1613
Price range: $$
Rating: 5

101 Exterminators does rodent control in Los Altos with exclusion first — we seal the way in before we set a single trap. Los Altos carries one of the densest mature canopies in the South Bay, and roof rats (Rattus rattus) use it as a road system, crossing from limb to limb and dropping onto low ranch rooflines. We are California licensed under SPCB Lic. #9119 and have worked Santa Clara County since 2005.

(831) 500-1613Free limited inspection · no obligation

Local Context

The Canopy Over Every Los Altos Street Works as One Continuous Road

Roof rats are arboreal, and Los Altos gave them an unbroken route. Mature trees line nearly every residential street, back yards connect through hedge and fence plantings, and the corridor along Adobe Creek behind Shoup Park and the Redwood Grove Nature Preserve links the whole thing to open ground. A rat can travel a Los Altos block without touching soil, which is why exterior bait alone tends to underperform here — the population is not commuting past the stations on the ground.

The entry point is almost always at roof level. Single-story ranch houses put the eave within easy reach of an overhanging limb, and sixty years of settling opens gaps where the fascia meets the roof sheathing, where a plumbing stack passes the deck, and behind unscreened or rusted attic vents. Once inside, rats nest in the blown insulation, and the insulation is usually what tells the story: compressed runways, droppings through the batts, and a smell in the hallway before anyone hears anything.

Eichlers and post-and-beam houses have no attic to lose, so the same animals use different space — the void behind a low-slope roof edge, the garage, wall cavities, and the planting beds in the atrium. Down on the flat blocks near San Antonio Road and El Camino Real, Norway rats work the storm drain and creek channels rather than the canopy, and they enter low: crawl-space vents, garage door corners, and gaps under thresholds.

How We Work in Los Altos

In Los Altos we get on a ladder early. The first pass is the roof plane — vent screens, fascia joints, ridge and eave gaps, plumbing stack collars, and the standoffs under any solar array — because that is the level roof rats actually enter at. We map runways in the attic or the wall voids, seal what we find with hardware cloth, copper mesh and sheet metal, then trap inside the structure and monitor exterior stations along the fence lines. We also tell you which limbs need to come back off the roof.

Los Altos Climate

Los Altos has a warm Silicon Valley climate with summer temperatures reaching 84–92°F and mild winters with 15–17 inches of rainfall. Its central valley position gives it consistent temperatures without the hillside extremes of Los Gatos or Saratoga. The mature tree canopy throughout the city creates a slightly cooler, more humid microenvironment at the street level that maintains Argentine ant activity and soil moisture year-round.

Housing Stock

Los Altos is defined by its 1950s–1960s ranch homes on well-maintained lots throughout virtually the entire city. These homes — now 60–70 years old — represent the heart of the drywood termite risk in Los Altos: original wood framing, original window trim and exterior siding, and crawl spaces that have been aging for decades. Custom and newer construction exists in smaller quantities near the hills adjacent to Los Altos Hills.

Why Local Expertise Matters

Los Altos' uniformly established 1950s–1960s housing stock means the entire city faces a similar generation of termite vulnerability simultaneously — we see this reflected in the consistent inspection findings throughout the city. Our 20 years of service in Los Altos gives us a thorough understanding of where drywood termite activity concentrates in this specific housing era.

Warning Signs

Signs You Need Rodents Service in Los Altos

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

Our Rodents Process in Los Altos

Every job follows the same methodical approach — no shortcuts, no guesswork. Here is what to expect when you work with us in Los Altos.

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

Rodents You Can Count On in Los Altos

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 Los Altos

How far back should tree limbs be trimmed from a Los Altos roofline?

Aim for at least four feet of clear air between any limb and the fascia, roof edge or chimney. Roof rats jump farther than most people expect, and a single branch touching the gutter functions as a bridge that no amount of ground-level baiting will address. On heavily canopied Los Altos lots this is usually the highest-value thing a homeowner can do, and it is worth coordinating with an arborist so the trees stay healthy. Fence-line hedges and trellises tied to the wall count as bridges too.

I have an Eichler in Los Altos with no attic. Where would rats be nesting?

In the wall voids, the garage, the low-slope roof edge, and the landscaping in and around the atrium. Post-and-beam houses trade the attic for exposed structure, so rodents use horizontal cavities and the perimeter instead of an open overhead space. Signs shift accordingly — gnawing at the base of siding, droppings along the garage wall, and noise in a wall rather than overhead. Inspection focuses on the slab edge, the utility penetrations and the roof-deck perimeter.

Why do rats turn up in Los Altos attics in the fall?

Because the food and cover outside change at the same time. Backyard fruit finishes, the hillside grass above Foothill Expressway cures out, landscaping gets cut back for winter, and the first cool nights arrive — so animals that spent the summer in the canopy start testing structures. That is the season when a gap that has been there for years finally gets used. Sealing the roof plane before the rains is the single most useful piece of timing on a Los Altos property.

Local Pest Pressure

Common Pests We Treat in Los Altos

Every area has its own pest profile shaped by climate, housing, and geography. These are the pests we see and treat most often in Los Altos — tap any one to learn how to identify it and what treatment involves.

Roof Rats

Dense mature urban tree canopy throughout Los Altos provides widespread arboreal rat habitat with direct roofline access to older homes via overhanging branches

Drywood Termites

1950s–1960s ranch homes throughout Los Altos have original wood framing that is now 60–70 years old — prime territory for established drywood termite colonies

Argentine Ants

Supercolonies extend throughout the fully-developed residential grid, supported by the consistently irrigated landscaping that maintains soil moisture year-round