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

Structural Pest Inspections

Pest Inspections in San Mateo, CA

101 Exterminators performs pest inspections in San Mateo for escrow, refinancing and pre-listing, issuing state-compliant WDO reports under SPCB Lic. #9119. With a median build year of 1965 and neighborhoods like Hayward Park reaching back to the 1920s, a San Mateo inspection is rarely a formality. We inspect the accessible structure, photograph every finding, and separate Section 1 from Section 2 in writing.

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Local Context

A 1965 Median Build Year Is Why Peninsula Escrows Turn on Section 1

A California WDO report splits findings into two categories, and that split drives the transaction. Section 1 is active infestation or existing damage. Section 2 is a condition likely to lead to infestation — wood-to-soil contact, a leaking shower pan, earth-filled porch steps, inadequate sub-area ventilation. Lenders and escrow generally turn on Section 1. In San Mateo the distinction carries more weight than average, because the housing stock is old enough to carry plenty of both.

The city's two-zone geography shows up directly in the reports. Uphill in San Mateo Park, Baywood and the Highlands, Section 1 findings skew toward drywood damage in eaves, rafter tails and window headers on framing standing since the 1920s and 1930s. Downhill in Shoreview, North Shoreview and the streets near Marina Lagoon, they skew toward subterranean evidence and fungus damage in sub-areas sitting close to a high water table. Same report form, very different findings.

Access is the practical constraint on a Peninsula inspection. A report covers what is accessible, and in San Mateo that gets limited constantly — a crawl-space hatch behind a stacked garage, an attic scuttle inside a full closet, a sub-area too shallow to enter, a deck skirt with no removable panel. Every inaccessible area is noted as such. On a transaction timeline, clearing access before we arrive is the easiest thing a seller controls.

How We Work in San Mateo

We inspect all accessible structural wood — attic framing, sub-area, sill plate, exterior siding and trim, decking, fencing and garage framing — and check for drywood and subterranean termites, wood-decay fungi, and conducive conditions. In San Mateo we make a point of getting into the sub-area on the bayshore side and onto the roofline on the hillside side, because that is where each half of the city hides its findings. The report goes out with photographs, exact locations, and Section 1 and Section 2 called separately.

San Mateo Climate

San Mateo has a mild Peninsula Mediterranean climate — warmer and less foggy than Daly City to the north, with summer temperatures typically reaching the mid-70s°F. Annual rainfall averages 19–21 inches. The combination of moderate warmth and adequate moisture creates conditions where both drywood and subterranean termites are active for extended seasons.

Housing Stock

San Mateo's older neighborhoods — Hayward Park, Baywood, North Central — have Craftsman bungalows and early-20th-century construction with original wood framing at various stages of termite exposure. Post-WWII tract housing dominates the mid-city areas. The Hillsdale corridor and newer Bay Meadows development represent modern construction. The range from 1910 to 2020 construction means termite risk and species composition vary significantly by neighborhood.

Why Local Expertise Matters

San Mateo's mix of historic Craftsman neighborhoods and post-war development requires experience with both drywood termite treatment in older framing and subterranean termite management in bayshore soils. We hold SPCB License #9119 and provide WDO reports that meet Peninsula real estate transaction standards.

Warning Signs

Signs You Need Inspections Service in San Mateo

We inspect all accessible structural wood including attic framing, crawl space, exterior siding, decking, fencing, and garage framing. We check for both drywood and subterranean termites, carpenter ants, fungi and wood decay, and conducive conditions such as wood-soil contact, excessive moisture, and improper drainage. Our written report clearly identifies Section 1 conditions (requiring treatment) and Section 2 conditions (requiring further investigation or preventive repair) with photographs.

Real estate transaction requiring lender or escrow-required pest inspection

Pre-listing inspection to disclose and address conditions before buyers discover them

Purchasing a home and want an independent inspection beyond the general home inspector's scope

Haven't had a pest inspection in more than 2 years on a property in termite-active areas

Visible wood damage of unknown cause on structural members

Any suspicion of termite, carpenter ant, or wood decay activity

How It Works

Our Inspections Process in San Mateo

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

01

Property Walkthrough & Access

We access all required areas per California SPCB standards — attic, crawl space, all accessible exterior wood, garage, and outbuildings included in the report scope.

02

Systematic Documentation

Every finding is photographed and noted with exact location. We distinguish between active infestations, old damage, and conducive conditions — using specific California reporting terminology.

03

Report Issuance

The completed Structural Pest Control Report (SPCB Form PR-2) is issued within 48 hours and delivered electronically. We can expedite to 24 hours for time-sensitive transactions.

04

Treatment & Clearance (If Needed)

If Section 1 conditions are found and treatment is authorized, we complete the work and issue a Completion Notice as required by the escrow or lender.

Why 101 Exterminators

Inspections You Can Count On in San Mateo

State-Compliant WDO Reports

We issue SPCB-compliant reports on the required PR-2 form, accepted by all California lenders, VA and FHA loan programs, and escrow companies statewide.

Objective Third-Party Assessment

As the treating company, we can also inspect — but we explain every finding clearly so you understand exactly what is present and what it means for treatment decisions.

Fast Turnaround for Transactions

Real estate transactions move on deadlines. We offer 24–48 hour report turnaround and can often schedule inspections within 1–2 business days.

Common Questions

Pest Inspections FAQs for San Mateo

What is the difference between Section 1 and Section 2 on a San Mateo WDO report?

Section 1 is active infestation or existing damage; Section 2 is a condition likely to lead to infestation. A live drywood colony in a Baywood rafter is Section 1. Earth-to-wood contact at a Shoreview porch post, or a poorly ventilated sub-area near Marina Lagoon, is Section 2. Escrow and lenders usually require the Section 1 items cleared, and once that work is done the Notice of Work Completed is the document your agent is waiting on.

We are selling in San Mateo Park — should we do the pest inspection before we list?

Yes, if you want control of the findings instead of a renegotiation. A pre-listing WDO report tells you what the Section 1 items are while there is still time to schedule the work, and in San Mateo Park and Baywood those items are frequently drywood damage in eaves and window headers on pre-1940 framing. Buyers discovering the same findings mid-escrow turns a scheduling question into a negotiation, on their timeline.

What can make part of my San Mateo house inaccessible during a pest inspection?

Anything blocking the sub-area, the attic, or the wood we need to see. The common ones here are a crawl-space hatch behind stored items in the garage, an attic scuttle inside a packed closet, a sub-area with less than the required clearance, a deck with no removable skirt panel, and locked or blocked side gates. Inaccessible areas are reported as inaccessible, which can trigger a follow-up visit. Clearing them beforehand keeps the report complete the first time.

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.

Drywood Termites

Pre-1940 Craftsman and Edwardian homes in San Mateo's older neighborhoods have significant drywood termite infestation history

Subterranean Termites

Bayshore and low-lying neighborhoods have soil moisture conditions supporting active subterranean termite colonies

Subterranean Termites

Eastern bayshore neighborhoods see elevated subterranean termite activity from Bay-adjacent soil moisture

Roof Rats

Mature tree canopy in older San Mateo neighborhoods provides habitat and access routes for roof rats

Argentine Ants

Supercolony pressure throughout the city with seasonal indoor invasions in spring and fall

Pest Inspections · San Mateo

Free Limited Inspections Inspection in San Mateo

CA licensed and insured. Written estimate before any work begins. Same-day response available for urgent situations in San Mateo.

Schedule an Inspection(831) 500-1613
Trusted by San Mateo families since 2005