San Mateo County, California Eviction Risk: High

San Mateo County lands at 8.1/10 (High) on the eviction-risk scale, placing it 47th out of 58 California eviction laws counties. That rank means only 11 counties in California are less risky for landlords; 46 are riskier, putting San Mateo County firmly in the lower-risk third of the state. For investors, that is a useful starting point, but it does not tell the full story: operating costs are high, average rent is $2,903, and the legal framework still demands careful attention from anyone putting capital to work across the county's 33 cities.

Renters make up 41.7% of county households, and the average rent-burden rate sits at 29.4%. Neither figure is alarming on its own, but together they signal a tenant population that has limited financial cushion in a market where any disruption to income can quickly translate into delinquency risk. The county's 6.5% poverty rate is relatively contained, which partly explains why the aggregate risk score stays moderate compared with many other California jurisdictions.

The cities inside San Mateo County

The county average obscures a striking range: scores run from 7.5 to 8.4 across the 33 cities, and that spread demands city-level due diligence. East Palo Alto is the clear outlier at 8.2/10, a score that places it in a different risk category from nearly every other city in the county and reflects concentrated economic stress that landlords need to price carefully. Colma follows at 7.9/10, and Woodside comes in at 7.8/10, both meaningfully above the county average.

At the other end of the spectrum, Foster City (8/10, population 32,792) and Menlo Park (8/10, population 32,727) represent the county's most favorable operating conditions. The county's two largest cities, San Mateo (8.1/10, population 103,105) and Daly City (8/10, population 101,964), bracket the county average, with Daly City running slightly hotter. Redwood City (8.2/10, population 82,447) is another large market that sits close to the moderate midpoint. The takeaway is that portfolio decisions made at the county level will miss the hyper-local variation that actually determines risk.

State-level laws that apply here

Every landlord in San Mateo County operates under California state law, and that framework is among the more tenant-protective in the country. For non-payment of rent or a curable lease violation, California requires a 3-day notice (CCP § 1161(2)-(3)). No-cause terminations require 30 days for tenancies under one year or 60 days for tenancies of one year or more (Civ. Code § 1946.1). Under AB 1482, most multi-unit buildings built before 2007 are subject to just-cause eviction requirements and a rent cap of 5% plus CPI, maximum 10% per year. Understanding the full California eviction process before filing is essential, because uncontested cases typically take 35 to 60 days from notice to lockout, while contested matters can run 75 to 180 days.

On the cost side, court filing fees range from $240 to $435, sheriff lockout fees from $75 to $145, and attorney fees commonly run $1,500 to $4,500, depending on case complexity. California eviction costs therefore can reach well into the thousands even for a relatively straightforward case. The state also protects source of income under Gov. Code § 12927, prohibits blanket criminal-history bans under FEHA, and requires 24-hour advance notice before landlord entry. Landlords unfamiliar with California security deposit limits and California tenant protections should review both before signing leases or pursuing any action.

With a county poverty rate of 6.5% and renters occupying 41.7% of households, the aggregate risk is moderate, but the grid of 33 cities above shows how sharply conditions diverge at the neighborhood level.