The Real Cost of Owning in Sausalito, CA
Sausalito is genuinely two housing markets sharing one 2.2-square-mile city, and the true carrying cost of each looks almost nothing alike. A hillside single-family home runs on the same cost structure as any Marin County house -- purchase price, property tax, insurance, maintenance. A floating home on Richardson Bay adds a second, entirely separate cost line that a conventional buyer has never budgeted for: a monthly berth lease paid to a marina operator, on top of owning the structure itself. This page lays out both, with real, sourced ranges rather than a single misleading number.
Purchase Price: Two Very Different Numbers
Conventional Sausalito home prices vary sharply by source and by exactly which slice of the market is being measured. Zillow's own "typical home value" tracker put Sausalito at roughly $1.48 million, down 2.4% over the trailing year as of a recent snapshot. Redfin's trailing-three-month median sale price ran closer to $1.9 million, down roughly 8% year-over-year. A separate June 2026 snapshot cited a $1.399 million median alongside a $1.925 million average sale price -- the gap between median and average itself signals a market with a small number of very high sales pulling the average up. None of these figures should be treated as a single confirmed citywide number; in a market this size, with this few transactions per month, the "median" moves a lot based on which handful of homes closed that quarter.
Floating homes run on their own separate price scale. Multiple sources put the realistic range at roughly $550,000 to $2.8 million-plus depending on size, dock, hull condition, and remaining berth lease term, with one April 2025 snapshot citing a median listing price of $1.85 million and an average of $1,253 per square foot -- notably, price-per-square-foot on a floating home compares to hillside real estate in a way that surprises buyers coming from land-based markets, since square footage on the water is genuinely limited by berth size, not lot size. A well-known recent example: Stewart Brand's converted 1912 tugboat Mirene, a 64-foot working boat turned one-bedroom, one-bath floating home, listed in November 2025 at $1.4 million after roughly 40 years of Brand living aboard.
The Floating-Home-Specific Cost: Berth Fees, Not Land
A floating home buyer owns the structure but not the water underneath it -- that berth is leased from one of Sausalito's five licensed marinas (Liberty, Issaquah, South 40, and Main docks off Gate 5 Road; Waldo Point Harbor off Gate 6 Road). The floating-home owners' own association describes typical berth fees running around $1,000 per month, though the figure varies by berth size and specific marina, and that fee generally covers water, garbage, sewage hookup, parking, and common-area maintenance -- costs a conventional homeowner pays separately or via a smaller HOA line item. That's a real, recurring cost most home-cost calculators simply don't have a field for, and it does not disappear once the mortgage or loan on the structure itself is paid off; it continues for as long as the home stays on that berth.
California passed AB 754 in 2025, a Marin County-specific amendment to the state's Floating Home Residency Law, capping most annual berth-fee increases at a CPI-based rate with a floor of 3% and a ceiling of 7.5% over any 12-month period, for increases taking effect on or after July 1, 2025. It also requires marina operators to show that utility and incidental fees reflect actual costs and bars marinas from charging separate fees just to enforce marina rules. That's a real, recent legal protection for berth-fee predictability -- but it is a cap on the rate of increase, not a cap on the fee itself, and this page did not find a confirmed current fee schedule for any single marina; get the current berth lease and fee terms in writing from the specific marina before treating any online estimate as your actual monthly number.
Property Tax: Prop 13 Applies the Same Way, With a Wrinkle for Floating Homes
California's Proposition 13 framework -- a 1% constitutional base assessed at purchase price, capped at 2% annual growth until the next sale -- governs conventional Sausalito real estate the same way it governs any California property. Marin-focused property tax guides put the practical ad-valorem total (base plus voter-approved local add-ons) at roughly 1.065% to 1.221% depending on the exact tax rate area, of which Marin County has more than 200. A separate property-tax data aggregator cites a Sausalito-specific effective rate of 1.34% and a median annual bill of $10,728 -- a somewhat higher figure than the general county range, and this page states both rather than resolving the disagreement. See the Property Tax page for the full mechanics and a worked example.
Floating homes are typically assessed and taxed as personal property (similar to a vessel) rather than real property, since the structure sits on a leased berth rather than owned land -- a materially different tax classification than a conventional house, though this page did not confirm a specific California vessel-property-tax rate or assessment method applicable to a Sausalito floating home from a primary Marin County Assessor source. Confirm the exact tax treatment for a specific floating home directly with the Marin County Assessor-Recorder's office before assuming Prop 13's real-property mechanics apply identically.
Financing: A Mortgage vs. a Marine Loan
A conventional hillside home finances like any other California house -- a standard mortgage, underwritten against the land and structure together. A floating home is a different animal financially: because it sits on leased water rather than owned land, it typically cannot be financed with a conventional real estate mortgage. Depending on how the specific structure is classified, financing usually runs through a chattel loan or marine loan from a portfolio lender or credit union that specializes in this kind of collateral, generally at a higher interest rate than a conventional mortgage and with a materially higher down payment requirement -- industry guidance cites 20% to 25% down as typical for houseboat and floating-home financing, well above what a conventional buyer might put down on a comparable house.
Before closing on a floating home, expect to pay for a marine survey -- a structural inspection of the hull and flotation system analogous to a home inspection, typically priced at roughly $15 to $25 per foot of vessel length -- plus likely a licensed electrician and plumber familiar with dock-side utility hookups, and on older structures, consideration of environmental testing given the age of some of Sausalito's original 1940s-era hulls. None of these costs applies to a conventional hillside purchase, and none of them is optional due diligence for a floating home; treat them as a real, additional line item in the total transaction cost, not an afterthought.
Insurance and Sales Tax: Both Layers Apply
Insurance costs differ by property type and location within Sausalito -- see the Coastal Insurance page for the full picture on California's FAIR Plan, wildfire-zone underwriting on the hillside, and the separate question of hull/marine coverage for a floating home versus standard homeowners coverage for a conventional house. Combined sales tax in Sausalito runs 9.25% (6% California state, 0.25% Marin County, 1% city, 2% special district, per published rate aggregators), which applies to furnishings, renovation materials, and most non-real-estate purchases tied to moving in and fitting out a new home here.
For a floating home specifically, a buyer should also budget for eventual haul-out and hull maintenance -- pulling the structure for below-waterline inspection and repair on a periodic cycle -- a cost category with no equivalent at all on a conventional hillside property, and one this page did not find a confirmed typical cost or interval for. Ask the specific marina and any prospective floating-home seller directly about haul-out history and cost before finalizing a purchase.
What This Page Does Not Know
This page does not have a single confirmed current berth-fee schedule for any specific Sausalito marina, a confirmed California vessel-property-tax rate or assessment method for a floating home, or a confirmed typical haul-out cost and interval. It also does not have a confirmed breakdown of what share of Sausalito's roughly 400 to 450-plus floating homes are financed with a chattel/marine loan versus purchased outright in cash, which industry commentary suggests is common in this niche but which this page did not independently verify with transaction-level data.
Get current, specific numbers from the Marin County Assessor-Recorder's office, a marine-loan lender or credit union active in this market, the specific marina where a berth is leased, and a marine surveyor before budgeting an actual Sausalito purchase, floating or conventional.
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Get a Free Agent Referral →Independent research. No ads. No sponsored listings. Data sourced from: Zillow, Redfin, and Movoto for conventional home price snapshots, explicitly flagged here as disagreeing with each other; multiple floating-home real estate guides (bayareamodern.com, scottcwoods.com, sharonkramlich.com, carlamarinhomes.com) and press coverage (SF Standard, Press Democrat) for floating-home price ranges, the Stewart Brand/Mirene example, and typical berth-fee figures from the floating-home owners' association; the California Legislature's own bill text and Floating Times coverage for AB 754 (2025) and its CPI-based berth-fee-increase caps; Marin-focused property tax guides and Ownwell for Prop 13 mechanics and Sausalito-specific effective-rate figures, explicitly flagged as disagreeing with the general county range; industry financing guides (Rocket Mortgage, AmeriSave, bayareamodern.com) for chattel/marine loan structure, typical down payment percentages, and marine survey cost ranges; and SalesTaxHandbook/Avalara for the combined sales tax rate. Facts not independently confirmed and not invented here include: a current berth-fee schedule for any single named marina; the specific California tax classification and assessed-value method applied to a Sausalito floating home; and typical haul-out cost or interval. Confirm all current figures with the Marin County Assessor-Recorder, a marine-loan lender, the specific marina involved, and a marine surveyor before making a purchase decision. Nothing on this page is tax, legal, or financial advice.