Marin County property record for 455 Ralston Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 900 sqft · built 1951 |
| Lot Size | 0.367 acres (16,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $700,000 (Jul 2006) |
| Tax Bill | $5,741 (2025) |
| Deeds & Mortgages | Jan 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 027-031-20 |
| Primary APN | 027-031-20 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 900 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1951 |
|---|---|
| Effective Year Built | Effective 1973 |
| Architectural Style | Contemporary |
| Lot Area | 16,000 sqft (0.367 acres) |
| Deck Area | 435 sqft |
| Patio Area | 435 sqft |
| Heating System | Floor/Wall Furnace |
|---|
| Street Address | 455 RALSTON AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-4540 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 5 |
| Census Block | 5000 |
| Census Tract | 127000 |
455 Ralston Ave is owned by two individuals who acquired it in January 2020.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | PO BOX 10559, TRUCKEE, CA 96162-0559 |
| Owner Type | Individual |
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 | Jul 18, 2006 · Amount on File |
| Deed Sale | Jul 18, 2006 · Amount on File |
| Deed Document Number | 200645156 |
| Last Transfer Date | Jan 14, 2020 |
| Transfer Doc | 0000005193 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 455 RALSTON AVE, MILL VALLEY, CA 94941-4540 |
| Instrument Date | Jan 14, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Feb 26, 2020 |
| Title Company | ATTORNEY ONLY |
| Name | Verified Name |
|---|---|
| Relationship | Married Couple |
| Address | 455 RALSTON AVE MILL VALLEY CA 949414540, MILL VALLEY, CA 94941-4540 |
| Document Number | 5369 |
|---|---|
| Date | Feb 10, 2020 |
| Instrument | 5369 |
| Name | BANK OF AMERICA |
|---|---|
| Type | Bank |
| Address | CHARLOTTE, NC 28255 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 180 Months |
| Due | Feb 9, 2035 |
The 2025 property tax bill for 455 Ralston Ave was $5,741.
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 | $288,216 (+2%) Land $47,513 Building $240,703 | |
| 2025 | $5,741.00 | $282,565 Land $46,581 Building $235,984 |
| 2023 | $5,429.00 (+3.71%) | $271,595 Land $44,773 Building $226,822 |
| 2022 | $5,235.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 455 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 455 Ralston Ave is moderate, ranking above 51% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 51% of the US · lower than 70% of California |
|---|---|
| Wildfire Likelihood | 0.1% 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 62 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 |
May also be available: Unwired.
4G LTE (outdoors only), no 5G reported
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