Berkeley Termite Control
Berkeley Termite Control — Historic Home Specialists
Berkeley's housing was built in two waves, and the line between them is a fire. South and east of campus, Elmwood and Claremont kept their pre-1923 brown shingles and Craftsman bungalows, framed in old-growth Douglas fir and redwood that was cheap and local when it went in. North of campus the fire of September 1923 took close to six hundred structures in a single afternoon, and Northbrae and Cragmont came back through the mid-1920s in stucco and tile. Both waves are now old enough that drywood termite colonies have had generations to work outward through the framing, and much of that stock has since been divided into flats and rental units. That last part is what changes the job: in a cut-up Berkeley house, activity found in one unit is almost never confined to it. 101 Exterminators provides SPCB-licensed termite inspection and treatment across Berkeley.
Local Intelligence
Understanding Berkeley
Effective pest control begins with understanding the specific conditions that drive pest activity in your area. Here is what shapes the pest landscape in Berkeley.
Climate & Weather
Berkeley's climate transitions from the foggy flatlands near the Bay to the warmer, drier hillside neighborhoods above the UC campus. The flats receive more marine fog, supporting subterranean termite activity in moist soils. The hills and hillside neighborhoods are warmer and drier — ideal drywood termite territory, with swarms active roughly August through October. Annual rainfall averages 22–25 inches in the hills.
Housing Stock
Berkeley reads as one old city but inspects as three. The pre-1923 brown shingle and Craftsman stock south of campus is the classic case: old-growth Douglas fir and redwood framing, shingle siding laid over sheathing with gaps behind it, and in many houses no record of a comprehensive termite treatment in living memory. The 1923 fire rebuild north of campus produced a distinct mid-1920s layer, stucco over wood frame, where the exterior gives away far less at a glance and the framing has to be reached through the attic and the crawl space. Everything west toward the Bay and south past Ashby is a mix of pre-war cottages and post-war infill. Across all three, the recurring complication is subdivision. Single-family houses turned into duplexes, triplexes, and rented flats decades ago, and the shared attics, common walls, and stacked plumbing chases that came with those conversions are the routes colonies and rodents use between units.
Geography & Landscape
Berkeley climbs from the Bay shoreline to the Tilden ridge, and most of its creeks make that climb in pipes. Strawberry, Codornices, and Derby creeks run culverted for long stretches beneath the flatland street grid before daylighting in parks or reaching the Bay. Those culverts are sheltered, continuous, and food-adjacent, and Norway rats travel them the way rats in flatter cities travel storm drains. Homes sitting over or beside a buried creek reach tend to see rodent pressure that has nothing to do with how clean the yard is, which is why the pattern confuses people. The buried water also keeps soil moisture up along those lines, and that is where subterranean termite foraging concentrates in the flats. Above the culvert belt the hillside neighborhoods run warmer and drier, sit inside the city's very high fire hazard zone, and carry a second problem: the ivy, woodpiles, and dense shrubs that defensible-space clearing targets are the same harborage roof rats depend on.
Pest Pressure
Drywood termites in pre-1930 framing are the dominant structural concern, and the volume of Berkeley housing that has never had a comprehensive treatment is what makes the city unusual rather than the species. Subterranean activity concentrates in the flats along the buried creek lines and in crawl spaces with standing damp. Roof rats work the mature fruit trees, oaks, and ornamentals that shade nearly every older block, and Norway rats work the culverts underneath them. Argentine ants run supercolonies through the whole city with the usual spring and fall pushes indoors. Two Berkeley-specific wrinkles shape the work more than the species list does. Much of the older stock is rented or divided into flats, so inspection access and treatment scheduling involve tenants and owners who are not the same people. And Berkeley homeowners ask about least-toxic and IPM-first approaches more often than customers anywhere else we work, which is a conversation to have before a treatment plan is written, not after.
Most Active Species
Priority Pests in Berkeley
These are the pests we see most frequently — and treat most effectively — in Berkeley. Each one reflects the specific environmental conditions of this area.
20+
Years Serving Central California
A+
BBB Rating
7
Counties Covered
440+
5-Star Google Reviews
Local Questions
Berkeley Pest Control FAQs
Are Berkeley brown shingle homes at high risk for termites?
Yes, and the siding is part of the reason. Berkeley brown shingles were typically built between 1900 and 1920 with redwood or Douglas fir framing, and the shingle course sits over sheathing with a gap behind it that gives western drywood termites, Incisitermes minor, a sheltered way in and a sheltered place to work. The infestations we find in these houses are usually in attic framing, wall framing, and window and door surrounds rather than anywhere an owner would notice from inside. A century of mild, rarely freezing weather means nothing has ever knocked a colony back for a season. If a pre-1930 Berkeley house has no treatment history on record, its condition on the surface tells you very little, and the framing is where the answer is.
What WDO inspection report format is used in Berkeley real estate transactions?
Berkeley uses the same statewide format every California transaction uses: an SPCB wood-destroying organism report separating Section 1, active infestation or damage that needs correction, from Section 2, conditions that invite future infestation. Our reports are issued on SPCB-licensed forms under license #9119 and filed with the board. Worth knowing before you book: a free pest evaluation is a walkthrough with a verbal read on what we find, and it does not produce a document. The official inspection is a separate paid service, and that is the one that generates the written WDO report a lender, a buyer, or an agent will ask for. In Berkeley's older subdivided houses, tell us up front how many units the building holds and who can let us into each one, because access is usually what determines how thorough the report can be.
Can I use orange oil instead of fumigation for my Berkeley Craftsman?
Sometimes, and the deciding factor is how spread out the colony is rather than which product you prefer. Orange oil works on localized drywood infestations where we can reach the galleries and treat them directly. Once activity is distributed across multiple framing members, which is the usual finding in a pre-1925 Berkeley house, a local treatment leaves colonies we never touched. Fumigation reaches everything at once. Heat treatment is a third option that suits some infestation patterns. Berkeley adds a practical constraint worth raising early: the older blocks were platted narrow, houses sit close together with mature trees overhanging both, and tenting needs clearance and neighbor coordination that a wider suburban lot never asks for. We look at the extent of the activity and the site together, then recommend from there.
I own a Berkeley duplex. If one unit has termites, does the other?
Assume yes until an inspection says otherwise. Most Berkeley duplexes and triplexes are single-family houses that were divided decades after they were framed, so the units share an attic, a subfloor, common walls, and the plumbing chases cut through them. Drywood termites do not recognize the partition, and neither do rodents using the same voids. Inspecting one unit and treating only that unit is how an owner ends up paying twice. The awkward part is usually access rather than biology: tenants have to be notified, and every unit has to be open on the same visit for the report to mean anything. Sorting that out before the appointment is the single thing that most improves the result.
Nearby Service Areas
Areas We Serve Near Here
Serving Berkeley
Free Pest Evaluation in Berkeley
CA licensed and insured. Written estimate before any work begins. Urgent pest situations are prioritized.