Marin County property record for 478 Wellesley Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,292 sqft · built 1962 |
| Lot Size | 0.084 acres (3,663 sqft) |
| Owner | Individual Name on File |
| Last Sale | $590,000 (Aug 1999) |
| Tax Bill | $13,636 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 051-063-18 |
| Primary APN | 051-063-18 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,292 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1965 |
| Architectural Style | Contemporary |
| Lot Area | 3,663 sqft (0.084 acres) |
| Garage Area | 680 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 120 sqft |
| Patio Area | 120 sqft |
| Heating System | Central |
|---|
| Street Address | 478 WELLESLEY AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-3540 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MARIN TERRACES BLK 00215 LOT 000016 MAP 000004 00044 |
| Legal Subdivision | MARIN TERS |
| Legal Block | 215 |
| Legal Lot Number | 16 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 128100 |
478 Wellesley Ave is owned and occupied by an individual who bought it in August 1999.
Source: Marin County records, as of July 13, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 478 WELLESLEY AVE, MILL VALLEY, CA 94941-3540 |
| Occupancy | Owner Occupied |
| 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 | Name on Deed |
|---|---|
| Last Sale | Aug 17, 1999 · Amount on File |
| Deed Sale | Aug 17, 1999 · Amount on File |
| Deed Document Number | 199961883 |
| Prior Transfer Date | Feb 23, 1994 |
| Prior Transfer Doc | 0000017359 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 478 Wellesley Ave was $13,636.
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| 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 | $921,754 (+2%) Land $667,380 Building $254,374 | |
| 2025 | $13,636.00 | $903,684 Land $654,297 Building $249,387 |
| 2023 | $12,923.00 (+3.43%) | $868,599 Land $628,894 Building $239,705 |
| 2022 | $12,494.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 478 Wellesley Ave in Zone X, an area of minimal flood risk, though there have been 4 flood claims nearby since 1982.
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 |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 4 in force |
| Nearby Flood Claims | 4 (1982–1998) |
| Claims Outside the SFHA | 4 of 4 |
| Most Recent Claim | Apr 1998 · Severe Winter Storms And Flooding |
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 478 Wellesley Ave is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 589 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 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Verizon.
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