A month by month look at squirrel pressure in Sacramento
Winter is repair season. Lows around 39F keep animals active but the roof is workable and fall damage is done, so January and February are a good window to close openings, as long as you know nothing is nesting behind them. Late winter and early spring bring the first litters. UC IPM describes California tree squirrels breeding in late winter or spring with three to five young, and that is when a light scurry overhead turns into a heavier, rolling sound that moves around the ceiling. This is the worst possible time to seal blind. Spring also opens the ground squirrel season. Adults are above ground from mid January, and UC IPM points to February through June as the fumigation window while the valley soil still holds winter moisture. Summer flips the daily schedule rather than the yearly one. With highs near 93F, everything happens early and late, and a silent afternoon means nothing. Fall is the destructive stretch. Caching drives chewing at trim, stored goods, and vent screening, and small holes become entries in a matter of weeks.
How to compare two squirrel quotes that look nothing alike
Squirrel bids vary more than almost any other pest work, because companies sell different products under the same word. Break every quote into four questions and the comparison gets easy. First, how many openings did you find, and where. A bid that cannot name a count has not surveyed the house. Ask for the list. Second, what material goes over each one. Half inch hardware cloth or metal flashing screwed to sound wood is the answer worth paying for. Foam, caulk, and plastic screening are not repairs, they are cosmetics with a short life. Third, who does the carpentry. Plenty of outfits remove the animal and hand you a repair list, which is a legitimate way to work but is not the same job as the company that includes it. Fourth, is cleanup in or out. Contaminated insulation removal often costs more than the animal work. Run those four questions past both companies and the cheaper Sacramento bid frequently turns out to be the smaller one, not the better one.
Prevention that suits valley houses and yards
Work from the outside in. squirrels reach roofs by jumping, so the first hour goes into the canopy: prune every branch back off the roof plane, and keep an eye on fast growing shade trees that close that gap again within a season. Next comes the building envelope. Walk the perimeter with binoculars and study the fascia line, the soffit returns, the gable louvers, the attic fan housing, and the point where a porch roof meets a wall. Anything open gets hardware cloth or metal screwed down. Drainage matters more here than people think. Nearly all of Sacramento's 20 inches of annual rain arrives in the cool months, and gutters that overflow keep the fascia wet all winter until the wood is soft enough to chew. Clearing them is squirrel prevention as much as roof maintenance. In the yard, remove the reasons to stay: fallen fruit and nuts, open trash, and bird feeders. And in spring, walk the lawn edges and slopes looking for fresh burrow mouths before a few holes become a tunnel network.
Which species is on your roof, and why it decides the plan
California has several squirrels in play, and they do not share a rulebook. The eastern fox squirrel and the eastern gray are introduced and common in cities. The western gray and the Douglas squirrel are natives. The California ground squirrel is the burrower. UC IPM sums up the practical split: fox squirrels doing damage may be controlled any time, while gray squirrels require a depredation permit from the state wildlife agency before anyone acts. That single sentence should determine your first phone call, because a company that skips identification is exposing you rather than helping you. The pattern holds across the West. Introduced grays and fox squirrels are generally unclassified, and native western species are frequently protected. Washington's wildlife agency lists the western gray squirrel as threatened, which shows how far that protection can go. Ask the inspector to say the species out loud, explain what tells them, and note it on the written plan. That note is the difference between a routine exclusion job and a call from a warden.
Renters, landlords, and the paperwork worth keeping
In a rental, an animal in the structure is generally the owner's problem, because a chewed opening in the roof edge is a defect in the building itself and it affects whether the place is fit to live in. A tenant cannot repair fascia and should not be asked to. The thing tenants control is the record. Report it in writing on day one, name the room the noise is over, note the time of day and how long it lasts, and photograph what you can see from the ground. That file is what makes a slow landlord move. Tenants can also undercut themselves. Feeders on a balcony, pet food left on a step, and six months of unreported scratching all give the other side something to point at. For owners of Sacramento rental property, early action is simply cheaper. Screening vents and keeping limbs trimmed costs a fraction of replacing an attic full of contaminated insulation. Ask for an invoice that lists each opening found and each repair made, and keep it, because the next tenant question comes eventually.