A mid-century modern Eichler-style home in a Silicon Valley neighborhood — San Mateo, California service area

Stinging Insect Control

Wasp & Bee Removal in San Mateo, CA

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

101 Exterminators handles wasp and bee removal in San Mateo, from yellowjacket ground nests to honey bee colonies inside a wall cavity, California licensed under SPCB Lic. #9119. San Mateo's Spanish Colonial Revival stucco soffits and barrel tile roofs hand stinging insects a cavity they never have to build. Most calls here start with something flying in and out of a hole in a wall.

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Local Context

Tile Roofs and Stucco Soffits Hand Yellowjackets a Ready-Made Cavity

Stinging insects in San Mateo mostly move into a space that already exists. The period-revival houses in Baywood and the 1920s Spanish Colonial Revival homes on the older blocks near Central Park put barrel tile over the roof and stucco under the eaves, and the mid-century stock around Beresford Park does much the same. Under tile there is a continuous air gap. Behind stucco there is a soffit void. Western yellowjackets (Vespula pensylvanica) take both, and the entry hole they use is often no wider than a pen.

The dry half of the year sets the pressure. San Mateo gets almost no rain from May through October, and yellowjacket colonies build straight through that stretch, peaking in late summer and early fall exactly when people are outside. Colonies that started in an abandoned rodent burrow on the dry slopes near Sugarloaf and Laurelwood Park become the ground nests homeowners find with a mower. Paper wasps (Polistes) take the simpler route — an eave corner, a patio cover, a play structure.

Honey bees (Apis mellifera) are a different problem with a different answer. A swarm that moves into a wall or chimney builds comb and stores honey, and killing the colony without removing that comb leaves wax and honey sitting in the cavity. It seeps through drywall in warm weather, draws ants and rodents, and the residual scent often pulls another swarm to the same void the next spring. The comb has to come out either way.

How We Work in San Mateo

We identify the insect before anyone touches the nest, because bees and wasps get different handling. In San Mateo that usually means watching the entry from a distance — under a barrel tile, at a stucco soffit seam, at a vent screen — to read the traffic and the direction of travel. Ground nests along the western open-space edge get treated at dusk when the colony is home. When honey bees are inside a wall we talk through opening the cavity, because comb left behind causes its own problems.

San Mateo Climate

The Peninsula’s marine influence and seasonal rain can affect moisture around a home. Look at drainage and wood contact at the property before drawing a termite conclusion.

Housing Stock

San Mateo has older raised-floor houses and later slab construction. A crawl space may exist, be inaccessible, or not exist at all; those distinctions belong in the report.

Why Local Expertise Matters

Ask which parts of the structure were seen and which were concealed by a slab, finished addition, or blocked access. If termite activity is confirmed, compare the written scope of localized and wider treatment options before choosing one.

Warning Signs

When to Ask About Wasp & Bee Removal in San Mateo

We treat yellow jacket nests (including in-ground and wall-void nests), paper wasp nests under eaves and overhangs, European and bald-faced hornet nests, and mud dauber tubes. For honey bee hives established in walls or structures, we provide complete treatment and nest removal including comb excavation to prevent future odor and secondary pest attraction. For accessible swarms, we can arrange transfer to a local beekeeper.

Visible nest under eaves, in shrubs, attached to window frames, in tree cavities, or in attic vents

Repeated wasp activity near a specific location on the structure — nest is likely nearby

Wasp or bee activity around a specific gap, crack, or vent opening — indicates cavity nest inside

In-ground yellow jacket activity — small hole in soil or mulch bed with wasps entering and exiting

Honey bee swarm visible on a tree, shrub, or structure — usually a temporary cluster

Buzzing sounds within walls, soffits, or chimney area — established honey bee hive

How It Works

What to Expect from Wasp & Bee Removal in San Mateo

Tell us where the nest or activity is and whether people need to pass close to it. Avoid disturbing the nest while we discuss the next step.

Species & Nest Location

We identify the species and locate all nesting sites, including in-wall or structural voids that require special access. Species determines the treatment approach.

Treatment in Protective Equipment

Our technicians treat nests in full protective equipment — veil, suit, and gloves. Evening treatment is preferred for ground nests when foragers have returned to the nest.

Nest Removal

After treatment, accessible nests are physically removed. For wall-void nests, we advise on comb removal to prevent secondary pest attraction from wax, honey, and larval material.

Entry Point Sealing

We seal entry points used by cavity-nesting species to prevent re-colonization by a new colony in the same location.

Why 101 Exterminators

Why Choose 101 Exterminators for Wasp & Bee Removal in San Mateo

Bee Relocation Option

When possible, we work with local beekeepers to relocate honey bee swarms and accessible hives rather than exterminating them. Good for bees, good for local agriculture.

Wall-Void Nest Removal

Nests inside walls require more than just treatment — the comb must be removed to prevent honey seepage, secondary pests, and odor. We handle the complete remediation.

Urgent Situations Come First

A wasp nest near an entry door, child's play area, or pet run is a safety emergency. We move these ahead of routine work.

Evening Ground Nest Treatment

Yellow jacket ground nests are treated at dusk when the full colony has returned, maximizing effectiveness and minimizing any risk of disrupted forager activity.

Common Questions

Wasp & Bee Removal FAQs for San Mateo

Something is flying in and out under the roof tiles on my Baywood house — wasps or bees?

Watch the traffic before you do anything. Yellowjackets fly a fast, direct line, look bare and are sharply banded; honey bees are fuzzier, move more slowly, and often arrive with pollen visible on their legs. Under the barrel tile common on San Mateo's Spanish Colonial Revival houses both species will use the same air gap, so the roofline alone tells you nothing. Identification decides the method, so we confirm the species before a ladder goes up.

When are yellowjackets worst in San Mateo?

Late summer into early fall, when colonies reach peak size after the long dry stretch from May through October. Foraging also shifts toward protein and sugar then, which is why they turn up at backyard tables around Beresford Park and Central Park in August and September. Ground nests on the dry western slopes near Sugarloaf and Laurelwood Park are usually discovered by accident with a mower or string trimmer. If that happens, back off and mark the spot.

A honey bee swarm moved into my San Mateo wall — what happens to the comb inside?

The comb has to be removed, which usually means opening the wall from one side. A colony in a wall cavity builds wax comb and stores honey; if the bees go and the comb stays, it softens in warm weather, stains through drywall, and attracts ants, cockroaches and rodents into the void. The leftover scent also makes that same cavity attractive to the next swarm. We locate the cavity, plan the access, and close it so it cannot be reoccupied.

Local Pest Pressure

Common Pests We Treat in San Mateo

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