Why do Berkeley's early 20th century wood houses need a close inspection?
Berkeley's housing stock, as the research describes it, leans heavily on Craftsman and other early 20th century wood houses. We do not put a median year on it, and we do not say how many of those houses sit on crawl spaces or slabs, because neither is sourced. What can be said is simpler: wood framing and wood siding are wood, and wood is what termites and decay fungi feed on.
One homeowner posting in an online forum described a bungalow of nearly a hundred years old with dry rot and moisture damage. That is a single anecdote, not data, and it should not be read as how Berkeley houses generally fare. It is still a good illustration of what inspectors look for in houses of that age: soft wood under windows, at door thresholds, around bathrooms and wherever water has had a way in.
A termite inspection covers both insects and decay, and the report is the document that many California sales rely on. If it finds rot, the next page to read is dry rot and wood damage. Rent or tenant obligations, and any disclosure rule that applies to a Berkeley sale, cannot be summarised here and should be checked with the city or an attorney.
When do termites swarm in Berkeley?
The only timing we can stand behind comes from UC IPM. Western subterranean termites swarm in calm, sunny periods right after the first autumn rains, and the pattern is especially pronounced in the San Francisco Bay Area. For a Berkeley homeowner, that means the days after the season's first real rain are the ones to watch for a cloud of winged insects at a window, a sill or a light.
Swarming is not the same as damage. A swarm shows that a colony exists somewhere nearby, and the question is whether it is in your building. Subterranean termites need contact with moist soil, so the places to check are the lowest wood of the house. Our subterranean termite control page explains how treatment follows an inspection.
Drywood termites are a different case. They live in dry wood above ground, such as attics, fascia and trim, and they do not need soil contact. We give no swarm month for them because none has been sourced, and we make no claim about any other termite species in the Bay Area. See drywood termite control for how they are handled.
Rats in North Berkeley and the hill streets
A local television news report covered North Berkeley residents saying that rat infestations were rising. It is a news account, not a statistic, and we do not turn it into a number. It does suggest that rats are a live concern in the residential parts of the city, and the hillside lots, with their dense planting and tall trees, suit the animal UC IPM describes as a climber: the roof rat, which nests above ground in shrubs and trees and indoors in attics, walls and false ceilings.
The ground-level species is different. Norway rats burrow along foundations and under rubbish or woodpiles, so a flatland yard with a stack of lumber can attract them as readily as a hillside one attracts roof rats. San Francisco's health department identifies the species first and then looks for the attractant, with garbage called a major one, and that order is sensible for any Berkeley address.
Our rat control and roof rat control pages describe the steps, and rodent exclusion covers sealing openings larger than about 1/4 inch with steel wool, wire screen or sheet metal.
Who do you call about public rat reports in Berkeley?
This page does not say. We did not confirm which public body takes rat or mosquito reports in Berkeley, and we would rather leave that blank than send you to the wrong place. What we can say is that Alameda County's own program is not the one to assume here, so do not rely on a general county statement for a Berkeley address; check with the city.
Whatever the answer, work on your own lot is the owner's responsibility, and that is where we come in. A technician can inspect the house, treat, and close the entry points. Phones are answered 24/7 on (855) 974-4733, and a same-day visit is scheduled only when a technician is free.
Because Berkeley houses are old and often tightly planted, inspections tend to go through the roofline, the foundation edge and the garden. For a house with attic noise, see attic and crawl space rodent work.
