Sausalito, CA Property Tax: The Rate, a Real Dollar Example, and the Floating-Home Wrinkle

Proposition 13, in Plain Terms

California's Proposition 13, passed by voters in 1978, sets the framework for every property tax bill in the state, Sausalito 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 market like Sausalito's hillside, where some neighborhoods reportedly posted year-over-year price gains over 100% in a single snapshot, two nearly identical houses on the same street can carry very different tax bills purely because of when each one last changed hands. A longtime owner who bought decades ago can carry an assessed value a small fraction of a 2026 buyer's actual purchase price.

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 subdivisions, Mello-Roos Community Facilities District assessments -- layer on top. Which specific add-ons apply to a given Sausalito 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 Sausalito -- and Two Numbers That Disagree

This page states real numbers rather than hiding behind a refusal to give one, and it states both when sources disagree rather than picking the more flattering figure. Marin-focused property tax guides describe the county's practical ad-valorem total -- base plus voter-approved add-ons, before any flat parcel tax -- running roughly 1.065% to 1.221% depending on the specific tax rate area for the 2025-26 fiscal year. Separately, Ownwell, a property-tax-appeal firm that publishes city-level effective-rate data, cites a Sausalito-specific effective rate of 1.34% and a median annual tax bill of $10,728 -- a noticeably higher figure than the general county-wide range. This page did not reconcile the gap between those two figures to a single number; they may reflect different underlying methodologies (a rate-area-based calculation versus an aggregate median-bill-over-median-value calculation), and a buyer should treat both as directional rather than a confirmed single rate for any specific parcel.

Put the more conservative end in real dollars: at a 1.1% effective rate, a home purchased at Redfin's trailing-three-month Sausalito median of roughly $1.9 million would carry a first-year property tax bill near $20,900. At the higher, Ownwell-cited 1.34% rate, that same $1.9 million purchase works out to roughly $25,460 per year. On a home purchased nearer Zillow's lower $1.48 million typical-value figure, the same two rates produce roughly $16,280 to $19,830 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, which is the only number that should be used to actually budget a specific purchase.

The Floating-Home Wrinkle: A Different Kind of Property, a Different Tax Treatment

A floating home in one of Sausalito's five licensed marinas is not taxed the same way as a conventional house, because it is generally not real property in the way land and a structure fixed to it are -- the structure sits on a leased berth, not owned land. Floating homes and houseboats are commonly assessed and taxed as personal property (in the manner of a vessel) rather than under the standard real-property Prop 13 assessment applied to a hillside home, which changes the mechanics of how value is set and how the bill is calculated. This page did not confirm the exact current California assessment method or effective rate applied to a Sausalito floating home from a primary Marin County Assessor source, and it does not estimate one here rather than guess at a figure this different from conventional real property.

A buyer moving from a conventional real estate market into a floating-home purchase should not assume Prop 13's familiar 1%-plus-add-ons mechanics apply identically -- ask the Marin County Assessor-Recorder's office directly, before making an offer, exactly how the specific floating home in question is currently classified and taxed, and whether that classification would change (or reset differently) upon a change of ownership.

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 Sausalito hillside listing showing a seller's tax bill based on a purchase from the 1990s or early 2000s 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 1.34%, per the sourced range above), not from whatever figure appears in the listing disclosures.

Portability and Exemptions

California's homeowner exemptions and transfer rules apply here 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 Sausalito'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 Sausalito 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. This page does not restate every Prop 19 eligibility rule here; the Marin County Assessor's office maintains current guidance and forms.