Marin County property record for 1 Ralston Ave, Mill Valley, CA 94941
| Property Type | Duplex |
|---|---|
| Details | 6 bd · 5.5 ba · 4,312 sqft · built 1979 |
| Lot Size | 0.496 acres (21,600 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $4,760,000 (Aug 2013) |
| Tax Bill | $70,598 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 027-141-08 |
| Primary APN | 027-141-08 |
|---|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 5.5 Baths |
| Half Baths | 1 Half Bath |
| Units | 2 Units |
| Building Area | 4,312 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1994 |
| Architectural Style | Contemporary |
| Lot Area | 21,600 sqft (0.496 acres) |
| Garage Area | 371 sqft |
| Parking Spaces | 1 Parking Space |
| Pool Area | 450 sqft |
| Deck Area | 1,682 sqft |
| Patio Area | 1,682 sqft |
| Heating System | Central |
|---|
| Street Address | 1 RALSTON AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-4536 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 5 |
| Census Block | 5000 |
| Census Tract | 127000 |
1 Ralston Ave, a duplex, is owner-occupied and held in a trust since December 2013.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 1 RALSTON AVE, MILL VALLEY, CA 94941-4536 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Living 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 Sale | Aug 29, 2013 · Amount on File |
| Deed Sale | Aug 29, 2013 · Amount on File |
| Prior Sale | Jul 26, 2011 · Amount on File |
| Deed Document Number | 201357142 |
| Last Transfer Date | Dec 23, 2013 |
| Transfer Doc | 0000000999 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 1 Ralston Ave was $70,598.
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | Mill Valley City |
| Elementary School District | Mill Valley Elementary School District (KG - 08) |
| Secondary School District | Tamalpais Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $5,939,020 (+2%) Land $3,188,316 Building $2,750,704 | |
| 2025 | $70,598.00 | $5,822,597 Land $3,125,815 Building $2,696,782 |
| 2023 | $68,017.00 (+1.45%) | $5,596,545 Land $3,004,461 Building $2,592,084 |
| 2022 | $67,042.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1 Ralston Ave in Zone X, an area of minimal flood risk, though there have been 11 flood claims nearby since 1983.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 14 policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 14 in force |
| Nearby Flood Claims | 11 (1983–2017) |
| Claims Outside the SFHA | 4 of 11 |
| Most Recent Claim | Mar 2017 · river or lake flooding |
| 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.
Wildfire risk around 1 Ralston Ave is moderate, ranking above 40% of the US, with a 0.06% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 40% of the US · lower than 76% of California |
|---|---|
| Wildfire Likelihood | 0.06% annual chance |
| Exposure | Direct burnable vegetation |
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 313 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
5G (outdoors only) and 4G LTE
Search by:
By searching, you agree to: Terms • Privacy • Disclosures