San Rafael, CA Property Tax: Prop 13 Mechanics, the Real Rate, and Measure P

Proposition 13, in Plain Terms

California's Proposition 13, passed by voters in 1978, governs every property tax bill in the state, San Rafael included. A property's assessed value is generally locked in at its purchase price at the time of sale (or the value of new construction when completed), and that assessed value can then rise by no more than 2% per year regardless of how fast the property's actual market value climbs -- until the next change of ownership resets it to the new purchase price. In a city with San Rafael's range of housing stock -- from modest inland tracts to million-dollar-plus waterfront homes near McNear's Beach -- two comparable houses can carry very different tax bills purely because of when each one last changed hands. A longtime owner who bought in the 1990s can be paying tax on an assessed value a small fraction of what a 2026 buyer would pay on the same house today.

The base rate is capped at 1% of assessed value at the state constitutional level. Actual bills run above a flat 1% almost everywhere in California because voter-approved local add-ons -- city and county bond measures, school district bonds and parcel taxes, and in some cases special-district assessments -- layer on top. Which specific add-ons apply to a given San Rafael parcel depends on its exact tax rate area; Marin County has more than 200 distinct tax rate areas, each with its own combination of overlapping taxing districts.

A Real, Sourced Rate for San Rafael -- and a Range by Zip Code

This page states real numbers rather than hiding behind a refusal to give one. Property-tax data aggregator Ownwell cites a San Rafael-specific median effective property tax rate of 1.43%, noticeably higher than the national median of 1.02% but below the broader California median of 1.21%. Separately, the same source cites an average effective rate for San Rafael of 1.55%, slightly above the Marin County average of 1.49%, with meaningful variation by zip code: 94903 (Terra Linda and the northern hills) runs highest at 1.59%, while 94901 (downtown and the Canal area) runs lowest at 1.52%. For a new buyer, the practical effective rate for a fresh purchase generally falls in the 1.0% to 1.25% range before the specific bonds and parcel taxes tied to an exact address are layered on -- the same aggregator reports the average San Rafael homeowner currently pays $10,252 a year in property tax, against a Marin County average of $12,779, reflecting the mix of longtime lower-assessed owners and recent higher-assessed buyers citywide.

Put a conservative estimate in real dollars: at a 1.1% effective rate, a home purchased at Redfin's October 2025 San Rafael median of roughly $1.1 million would carry a first-year property tax bill near $12,100. At the higher, Ownwell-cited 1.55% average rate, that same purchase works out to roughly $17,050 per year. On a waterfront purchase nearer the Loch Lomond/Canal North median of $1.46 million, the same two rates produce roughly $16,060 to $22,630 per year. These are illustrative, rate-times-price calculations for planning purposes only -- not a substitute for the Marin County Assessor's own parcel-specific figure.

Measure P: A Real, Current 2024 Parcel Tax Add-On

San Rafael voters approved Measure P on November 5, 2024, a special parcel tax specifically to fund construction of a new main library and community center at Albert Park, near First Street and B Street in downtown San Rafael, with the possibility of upgrading the Pickleweed and Terra Linda branch libraries if funding remains after the main project. The tax is levied at $0.145 per square foot of improved building area, plus a flat $75 for vacant parcels, estimated to generate roughly $6.37 million annually, and continues for 30 years or until the construction bonds it backs are paid off -- whichever comes first. This is a real, current, additional line item on top of the base Prop 13 calculation for essentially every improved parcel in the city, not a hypothetical future possibility.

Because Measure P is assessed per square foot of improved building area rather than as a percentage of value, its dollar impact scales with a structure's size rather than its price -- meaning it affects a large but modestly priced inland home and a similarly sized waterfront home roughly the same way in absolute terms, a genuinely different mechanic than the ad-valorem Prop 13 base. Confirm the exact current per-parcel amount for a specific address with the Marin County Tax Collector.

Why the Seller's Current Tax Bill Is the Wrong Number to Budget From

Because Prop 13 resets assessed value to the purchase price at every change of ownership, a seller's current property tax bill reflects whatever they paid -- possibly decades ago, possibly capped at 2% annual growth ever since. A San Rafael listing showing a seller's tax bill based on a 1990s or early-2000s purchase price tells a 2026 buyer almost nothing about their own future bill. Budget from the actual purchase price times a realistic current effective rate (roughly 1.1% to 1.55%, per the sourced range above, plus Measure P's per-square-foot add-on), not from whatever figure appears in the listing disclosures.

Portability and Exemptions

California's homeowner exemptions and transfer rules apply in San Rafael the same way they do statewide. A modest homeowner's exemption reduces assessed value for an owner-occupied primary residence, though it's a relatively small dollar benefit against San Rafael's price levels. Proposition 19 (approved 2020, effective in phases from 2021) lets eligible homeowners age 55+, severely disabled homeowners, and wildfire/disaster victims transfer their existing, lower assessed value to a replacement home elsewhere in California -- generally up to three times for age/disability-based moves -- which can matter for a longtime California homeowner relocating into San Rafael and trying to avoid a full reassessment at current prices. Prop 19 also narrowed the prior parent-child transfer exclusion, generally now requiring the child to use an inherited home as their own primary residence to keep the parent's lower assessed value. The Marin County Assessor's office maintains current forms and eligibility guidance rather than this page restating every rule.