La Jolla's rodent calls are mostly about roof rats, and the neighborhood's landscaping explains why. Mature eucalyptus, Torrey pines, bougainvillea, citrus and decades-old hedges cover the hills above the Village and the Shores. Roof rats live in that greenery and reach houses along branches and garden walls that run right up to the eaves.
The housing mix ranges from 1920s beach cottages near Windansea and in the Village to mid-century homes in La Jolla Heights and Muirlands, and large hillside houses on Mount Soledad with deep crawl spaces and complicated rooflines. Older cottages often have wood siding with gaps at the sill, and many have been added onto more than once. Every addition leaves a seam where the old roof meets the new one, and those seams are favorite entry points.
Canyons run down the east side toward Rose Canyon and through the hills between neighborhoods. Homes that back onto them see steady pressure from rodents that live in the brush. Marine layer mornings keep gardens green and fruit on the trees for long stretches, which means roof rats have food much of the year.
The commercial strips along Prospect Street, Girard Avenue and La Jolla Boulevard in Bird Rock hold restaurants, cafés and markets, and their shared alleys and trash enclosures draw rats at night. Food businesses here fall under the county health department's rules on vermin, which can close a kitchen. See restaurant rodent control.
If you call from La Jolla, mention whether you are on a hillside, near a canyon or close to the water, and whether the house has a crawl space. Ask the technician to check the whole roof edge, including any tile ends and joints between rooflines, and to point out branches that need trimming. The county suggests keeping vegetation at least 4 feet from the roof. On older cottages, ask about the sill line and any gaps where wood siding meets the foundation.