Pest control in California follows wood, water, and the gap between the house and the yard. Drywood termites worry the warmer south and many inland areas, working inside eaves, fascia, and attic framing without a soil connection you can see from the lawn. Subterranean termites matter more where soil stays moist, including irrigated yards and cooler damper regions. Roof rats use palms, ivy, and fence lines as highways into attics. Ants move in when the ground outside dries out or when a kitchen offers a steady crumb and a drip.
The building tells you which pest is even possible. A raised bungalow with a crawl space gives rodents, termites, and damp-wood insects a hidden route. A slab house moves the problem into garages, bath traps, and the edges where stucco meets soil. Attached city houses share walls, so a rodent issue on one flat becomes a noise in the next. Tile roofs and flat roofs create different voids. Palm skirts, heavy ground cover, and wood piles against the siding are invitations. If the yard touches the wall, the pest program starts outside.
A spray without a finding is how people chase the same trail for months. Droppings in the attic, wings on a sill, mud tubes on a foundation, hollow-sounding trim, or a night scratch in a wall are different clues and they point at different work. Coastal damp adds springtails, ants, and wood decay that can be mistaken for active insects. Hot inland attics drive animals toward cooler insulation and toward plumbing penetrations. Winter rain pushes rodents toward the first dry wall cavity they can find.
Before you call, note what you saw, where you saw it, and when it happens. Look under sinks, along the foundation, and in the attic or crawl space if you can do that safely. Mention pets, food storage, and any recent opening of a wall or a roof. Say whether the house is near heavy planting, a canyon, a creek, or a dense block of attached homes. The work should target the pest you have in the structure you have.
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