Marin County property record for 90 Seafirth Rd, Tiburon, CA 94920
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,050 sqft · built 1955 |
| Lot Size | 0.469 acres (20,408 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $6,692 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-101-35 |
| Primary APN | 039-101-35 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 3,050 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1960 |
| Architectural Style | Contemporary |
| Lot Area | 20,408 sqft (0.469 acres) |
| Garage Area | 832 sqft |
| Parking Spaces | 3 Parking Spaces |
| Deck Area | 1,129 sqft |
| Patio Area | 1,129 sqft |
| Heating System | Central |
|---|
| Street Address | 90 SEAFIRTH RD |
|---|---|
| City | BELVEDERE TIBURON |
| State | CA |
| Zip | 94920-1140 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | SEAFIRTH SUB |
| Legal Lot Number | 12 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 3 |
| Census Block | 3004 |
| Census Tract | 124200 |
90 Seafirth Rd is owner-occupied and held in a trust since June 2025.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 90 SEAFIRTH RD, BELVEDERE TIBURON, CA 94920-1140 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Jun 20, 2025 |
| Transfer Doc | 0000018335 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 90 Seafirth Rd was $6,692.
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | Tiburon Town |
| Elementary School District | Reed Union Elementary School District (KG - 08) |
| Secondary School District | Tamalpais Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $411,215 (+2%) Land $92,509 Building $318,706 | |
| 2025 | $6,692.00 Homeowner's exemption | $403,154 Land $90,695 Building $312,459 |
| 2023 | $5,951.00 (+6.73%) Homeowner's exemption | $387,500 Land $87,174 Building $300,326 |
| 2022 | $5,576.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 90 Seafirth Rd in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone VE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 32 individual policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 37 units insured incl. 5 condo units |
| Nearby Flood Claims | 14 (1982–2026) |
| Claims Outside the SFHA | 7 of 14 |
| Most Recent Claim | Jan 2026 · tidal / storm surge |
| Claims by Event |
|
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
The area around 90 Seafirth Rd has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | MARIN MUNICIPAL WATER DISTRICT serves 188,116 people · EPA ID CA2110002 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Aug 2023 |
| Lead | Under 1 ppb (2019–2021) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 24 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: Etheric Networks.
5G (outdoors only) and 4G LTE
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