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

Rodent Management

Rodent Control in Los Altos Hills, CA

101 Exterminators does exclusion-first rodent control in Los Altos Hills — roof rats in the oak canopy, pocket gophers in irrigated pasture, gray squirrels and raccoons in attics. We are CA licensed under SPCB Lic. #9119 and have worked Santa Clara County since 2005. With Rancho San Antonio and Byrne Preserve on the town boundary, the source population never leaves, so sealing the building is the part that lasts.

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Local Context

Roof Rats Commute Along the Oak Canopy, Not Across the Ground

Roof rats (Rattus rattus) are arboreal, and Los Altos Hills is built under a nearly continuous canopy of native oak mixed with orchard survivors — walnut, plum, apricot and citrus left from the ranch era. A rat crosses from a limb to a fascia board without touching soil once. That is why a house set three hundred feet back from Fremont Road still gets attic activity: the road that matters is overhead.

Underground, the dominant complaint is Botta's pocket gopher (Thomomys bottae). Irrigated pasture, orchard soil and estate landscaping on one-acre lots give gophers the loose, worked ground they need, and a single animal maintains a tunnel system running hundreds of feet. Fresh crescent-shaped mounds with a plug on one side appear after every irrigation cycle and after every winter storm across the Purissima and Robleda flats.

Then there is what comes over the boundary. Byrne Preserve, Juan Prado Mesa, O'Keefe Open Space and the Rancho San Antonio frontage hold permanent populations of gray squirrels, raccoons and woodrats, and they enter attics and crawl spaces through roof vents, eave gaps and chimney surrounds. Trapping alone never finishes the job here, because the preserve refills whatever you remove. Exclusion is what holds.

How We Work in Los Altos Hills

We map before we set anything: gnaw marks, grease trails, latrine areas, burrows and the limbs that reach your roofline. In Los Altos Hills the fix usually starts outside — pulling tree contact back off the roof, screening attic and foundation vents, and closing eave gaps and pipe penetrations with hardware cloth and sheet metal. Then we trap inside and run tamper-resistant exterior stations where they are appropriate around outbuildings. Gopher work is separate: we trap active tunnel systems and advise on buried hardware-cloth baskets for high-value plantings and irrigation lines.

Los Altos Hills Climate

The foothill elevation gives Los Altos Hills 18 to 24 inches of rain a year, more than the valley floor below it, and the oak woodland keeps ground-level humidity up under the canopy even when open areas hit 85 to 93°F in July. The number that drives pest behavior here is not the temperature, it is the contrast that opens in summer. The creeks draw down or run dry by July while the town's landscaping, pastures, and leach fields stay wet on a schedule. From midsummer through the first rains, the irrigated parcels are the only reliably damp ground for a long way, and gophers, rats, and wildlife all move toward them.

Housing Stock

The town is almost entirely custom single-family homes on lots of an acre and up, running from 1950s and 1960s ranches through recent large builds, with working horse properties, stables, and remnant orchard trees mixed among them. That layout matters for pests in a couple of ways. Many parcels are on septic rather than sewer, and a leach field holds a defined patch of subsoil moist straight through a dry summer, which is what gophers and subterranean termites are both looking for. And the outbuildings add up: a barn, a hay store, a tack room, a pool house, a detached garage, a well house. Each one is unheated wood that nobody walks through daily, which is where black widow and rodent populations get established before anyone notices them.

Why Local Expertise Matters

A gopher program on a two-acre horse property is a different job from a gopher program on a suburban lot, and treating them the same is why the mounds come back. Here we map the active tunnel systems across the whole parcel, work the main runs instead of the surface mounds, and set the schedule around irrigation and pasture use rather than a fixed calendar. On septic parcels we locate the leach field and the well head before anything else, because those areas change both where the activity concentrates and where we are willing to work. That calibration comes from doing agricultural and rural properties across our four counties since 2005. SPCB Lic. #9119.

Warning Signs

Signs You Need Rodents Service in Los Altos Hills

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 Hills

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

01

Inspection & Runway Mapping

We identify gnaw marks, runways, burrows, droppings, and grease trails to map rodent activity throughout the property — interior and exterior.

02

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.

03

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.

04

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 Hills

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 Hills

Something runs in my Los Altos Hills attic at night. Rats or squirrels?

Time of day is the fastest tell: gray squirrels are active in daylight and go quiet after dark, while roof rats run at night. Squirrel entry is also usually a chewed, ragged hole at a roof edge, gable vent or chimney surround, where roof rats slip through gaps you would not notice. Both are common here because the preserves on the town boundary hold permanent populations. We confirm with droppings and entry-point evidence before setting anything.

Can gophers really be eliminated from an irrigated pasture in Los Altos Hills?

On an actively irrigated acre, sustained management is the honest goal rather than permanent elimination — the surrounding pasture and open space keep repopulating the ground. Trapping active tunnel systems is the most effective method, and we work them until activity stops. For vineyard rows, specimen trees and irrigation infrastructure, buried hardware-cloth baskets protect specific areas long term. A maintenance schedule keeps mound counts down instead of restarting the fight every spring.

Do I have to cut down my oaks to keep roof rats off the roof?

No — you need clearance, not removal. Roof rats travel limb to roofline, so trimming branches back about three feet from the roof edge and gutter breaks the bridge without harming the tree. Around Los Altos Hills that also means checking arbors, trellises, wisteria, ivy on chimneys and any vineyard wire running toward the house. Once the aerial routes are gone, screening the vents and closing eave gaps finishes it.

Local Pest Pressure

Common Pests We Treat in Los Altos Hills

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 Hills — tap any one to learn how to identify it and what treatment involves.

Pocket Gophers

Large irrigated lots, horse pastures, and orchard soil throughout Los Altos Hills create the most extensive gopher habitat in Santa Clara County — nearly every property has gopher activity

Roof Rats

Orchard trees throughout the large lots and the oak woodland canopy of the hillside provide endemic roof rat habitat with direct roofline access from overhanging branches

Wildlife Intrusion

Open space adjacency from Rancho San Antonio and the foothills brings gray squirrels, raccoons, and other wildlife that enters attics and crawl spaces more commonly than in flat valley cities

Drywood Termites

Custom homes throughout Los Altos Hills from the 1950s–1980s have original wood framing with established drywood termite histories

Black Widows

Horse stables, hay storage, tool sheds, and the abundant outdoor structures throughout large-lot Los Altos Hills properties are prime black widow habitat

Rodent Control · Los Altos Hills

Free Pest Evaluation in Los Altos Hills

CA licensed and insured. Written estimate before any work begins. Urgent situations in Los Altos Hills are prioritized.

Schedule an Inspection(831) 500-1613
Trusted by Los Altos Hills families since 2005