Marin County property record for 400 Ralston Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,431 sqft · built 1929 |
| Lot Size | 0.819 acres (35,686 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $837,000 (Jul 2012) |
| Tax Bill | $20,891 (2025) |
| Deeds & Mortgages | Mar 2021 Mortgage Nov 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 027-033-31 |
| Primary APN | 027-033-31 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 2,431 sqft Living Area |
| Basement Area | 115 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1929 |
|---|---|
| Effective Year Built | Effective 2002 |
| Architectural Style | Contemporary |
| Lot Area | 35,686 sqft (0.819 acres) |
| Deck Area | 1,175 sqft |
| Patio Area | 1,319 sqft |
| Heating System | Central |
|---|
| Street Address | 400 RALSTON AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-4535 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | TAMALPAIS LAND & WATER CO |
| Legal Lot Number | 16 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 5 |
| Census Block | 5002 |
| Census Tract | 127000 |
400 Ralston Ave is owner-occupied and held in a trust since April 2014.
Source: Marin County records, as of July 14, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 400 RALSTON AVE, MILL VALLEY, CA 94941-4535 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Mar 8, 2021 | Deed of Trust, Mortgage · Conventional Mortgage M & T BANK |
| Nov 20, 2020 | Deed of Trust, Mortgage · Conventional Mortgage MANUFACTURERS & TRADERS TRUST CO |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 24, 2012 · Amount on File |
| Deed Sale | Jul 24, 2012 · Amount on File |
| Deed Document Number | 201244819 |
| Last Transfer Date | Apr 25, 2014 |
| Transfer Doc | 0000016470 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 400 RALSTON AVE, MILL VALLEY, CA 94941-4535 |
| Transaction Type | Mortgage |
| Record Updated | Mar 26, 2021 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Name | Verified Name |
|---|---|
| Address | 400 RALSTON AVE, MILL VALLEY, CA 94941-4535 |
| Document Number | 0000015950 |
|---|---|
| Date | Mar 8, 2021 |
| Instrument | 2021-0015950 |
| Name | M & T BANK |
|---|---|
| Type | Bank |
| Address | BUFFALO, NY 14203 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 314 Months |
| Due | May 2, 2047 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 400 RALSTON AVE, MILL VALLEY, CA 94941-4535 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 400 RALSTON AVE, MILL VALLEY, CA 94941-4535 |
| Document Number | 0000058753 |
|---|---|
| Date | Nov 20, 2020 |
| Instrument | 2020-0058753 |
| Name | MANUFACTURERS & TRADERS TRUST CO |
|---|---|
| Type | Bank |
| Address | BUFFALO, NY 14203 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 318 Months |
| Due | May 1, 2047 |
The 2025 property tax bill for 400 Ralston Ave was $20,891 with a homeowner's exemption.
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 | $1,546,322 (+2%) Land $690,800 Building $855,522 | |
| 2025 | $20,891.00 Homeowner's exemption | $1,516,010 Land $677,259 Building $838,751 |
| 2023 | $20,008.00 (+4.27%) Homeowner's exemption | $1,457,149 Land $650,963 Building $806,186 |
| 2022 | $19,188.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 400 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 400 Ralston Ave is moderate, ranking above 52% 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 52% of the US · lower than 69% 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 27 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 and 4G LTE (outdoors only)
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