Marin County Property Taxes by Town: What Buyers Actually Pay

How California Property Taxes Work: Proposition 13

Before comparing towns, it helps to understand the rule that governs every property tax bill in California. Passed by voters in 1978, Proposition 13 caps the general property tax at 1% of a home's assessed value. Just as important, it fixes that assessed value at your purchase price, then limits annual growth to roughly 2% per year for as long as you own the home.

This is why two neighbors on the same street can pay wildly different tax bills. The assessed value only resets when there is a change of ownership or new construction that triggers a reassessment. When you buy, your assessed value is set to what you paid, which means a new buyer typically steps into a higher bill than a long-time owner next door.

The 1% base is just the starting point. On top of it, voters in each area approve bond debt-service rates to repay school and municipal construction bonds, plus flat special charges and parcel taxes. Add those together and the real, all-in rate climbs above 1%, with the exact figure depending entirely on where the property sits.

The Marin Tax Picture: One County, 368 Tax Areas

Marin's roughly $1.585 billion total property tax levy for FY2025-26 shows how the layers stack up. About $1.1 billion comes from the Proposition 13 1% base, roughly $161 million from voter-approved bonds, and about $309 million from special charges and parcel taxes.

What surprises many buyers is how finely the county is divided. Marin contains 368 Tax Rate Areas (TRAs) served by 108 separate taxing entities, including cities, school districts, fire and water districts, and more. Your specific TRA determines precisely which bonds and special charges apply to your parcel.

This is the key takeaway for shoppers: the town name on the listing is a useful guide, but the exact bill is set at the parcel level. Two homes in the same town can fall into different TRAs and carry different rates, so the published town averages below are a strong starting point rather than the final word.

Ad-Valorem Tax Rates by Marin Town, FY2025-26

The ad-valorem rate is the percentage-based portion of your bill: the 1% Prop 13 base plus any voter-approved bonds. Across Marin towns, the verified range for FY2025-26 runs from roughly 1.065% to 1.221%, and almost all of that spread comes from which school and municipal bond measures overlay a given area.

Here is how a representative sample of towns compares. Tiburon and Belvedere sit near the low end at about 1.097%. Corte Madera and Mill Valley come in around 1.121%, with Ross close behind at 1.126%. Larkspur spans roughly 1.121% to 1.206% depending on the area, while Sausalito is about 1.136% and Novato about 1.137%.

Moving up the scale, San Anselmo runs about 1.168%, San Rafael about 1.206%, and Fairfax tops the sampled list at roughly 1.221%. None of these gaps are dramatic in isolation, but on a multimillion-dollar home the difference between the lowest and highest town can add several thousand dollars to your annual bill.

Parcel Taxes and Special Charges: The Flat-Dollar Layer

Percentages only tell part of the story. Special and parcel taxes are flat dollar amounts rather than a percentage of value, so they don't show up in the ad-valorem rate but still land on your bill. Because they are fixed dollar figures, they make up a larger share of the cost on a modest home and a smaller share on an expensive one.

The most widespread of these in Marin is the Marin Wildfire Prevention Authority (MWPA) "Measure C" parcel tax, which charges up to 10 cents per building square foot (plus $75 per multifamily unit). It funds wildfire prevention work across the county and is currently in effect through FY2029-30. On a 3,000-square-foot home, that single line item adds roughly $300 a year.

Beyond Measure C, school and special-district parcel taxes are common throughout Marin, so it pays to read an actual tax bill rather than rely on a rate percentage alone. The good news is that classic Mello-Roos community facilities districts are relatively rare in Marin compared with newer-development counties, so most buyers here aren't taking on the large special assessments common in fast-growing suburbs elsewhere in California.

Transfer Tax and a Real-World Example

There is one more tax buyers should budget for at closing rather than annually. Marin's transfer tax is $1.10 per $1,000 of the sale price, and it is customarily split between buyer and seller. On a $1.5 million sale, that's $1,650 total, or about $825 each under a typical split, though who pays what is always negotiable in the purchase agreement.

To put the ongoing numbers in perspective, consider a $1.5 million purchase. The ad-valorem portion of the bill alone, the 1% base plus bonds, runs roughly $16,000 to $18,000 per year before any flat parcel taxes are added. Layer in Measure C and any local school parcel taxes, and the all-in figure climbs from there.

For budgeting, a sensible rule of thumb is to assume your first-year ad-valorem taxes will be a bit over 1.1% of your purchase price in most Marin towns, then add a few hundred dollars for parcel taxes. Your lender will typically collect this through an escrow impound account, spreading the cost across your monthly mortgage payment.

Plan Your Marin Purchase with Taylor Lee

Property taxes are predictable once you understand the layers, but they reward a buyer who checks the details before writing an offer. Knowing your target town's ad-valorem rate, the parcel taxes attached to a specific TRA, and your closing-day transfer tax lets you compare homes on a true total-cost basis rather than list price alone.

If you're considering a move to Marin County, Taylor Lee of Golden Gate Sotheby's International Realty can help you understand the full cost of ownership for any property you're considering, from town-level tax differences to the parcel-specific charges that don't appear in a quick search. Reach out to talk through your goals and which Marin communities best fit your budget and lifestyle.

*Disclaimer: Property tax rates, bond measures, and parcel taxes change every year, and the figures above reflect FY2025-26 sampled data for general guidance only. Always verify the exact rates and special assessments for a specific parcel with the Marin County Assessor and consult a qualified tax professional before making a purchase decision.*

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