Marin County property record for 431 Wellesley Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4.5 ba · 3,563 sqft · built 1983 |
| Lot Size | 0.567 acres (24,700 sqft) |
| Owner | Company Name on Record |
| Last Sale | $4,000,000 (Apr 2025) |
| Tax Bill | $36,996 (2025) |
| Deeds & Mortgages | Nov 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 050-061-52 |
| Primary APN | 050-061-52 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Building Area | 3,563 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1983 |
|---|---|
| Effective Year Built | Effective 1995 |
| Architectural Style | Contemporary |
| Lot Area | 24,700 sqft (0.567 acres) |
| Garage Area | 484 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 1,031 sqft |
| Patio Area | 1,031 sqft |
| Heating System | Central |
|---|
| Street Address | 431 WELLESLEY AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-3713 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MAP 18 PG 25 LOT 8 |
| Legal Subdivision | WELLESLEY AVE SUB |
| Legal Lot Number | 8 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 128100 |
Source: Marin County records, as of July 13, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 100 BISCAYNE BLVD, 1315, MIAMI, FL 33132-2309 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 8, 2025 · Amount on Record |
| Deed Sale | Apr 8, 2025 · Amount on Record |
| Prior Sale | May 30, 2012 · Amount on Record |
| Deed Document Number | 20259662 |
| Prior Transfer Date | May 6, 1996 |
| Prior Transfer Doc | 0000025978 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 431 WELLESLEY AVE, MILL VALLEY, CA 94941-3713 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | LAWYERS TITLE CO |
| Name | Verified Name |
|---|---|
| Address | 431 WELLESLEY AVE, MILL VALLEY, CA 94941-3713 |
| Document Number | 0000056426 |
|---|---|
| Date | Nov 12, 2020 |
| Instrument | 2020-0056426 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Address | SIOUX FALLS, SD 57104 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Dec 1, 2050 |
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 | $4,080,000 (+56.68%) Land $2,040,000 Building $2,040,000 | |
| 2025 | $36,996.00 (+3%) | $2,603,981 (+4.04%) Land $1,255,990 Building $1,347,991 |
| 2023 | $35,919.00 (+3.62%) | $2,502,889 Land $1,207,230 Building $1,295,659 |
| 2022 | $34,663.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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.
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 | 0.02% 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 496 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: T-Mobile, Unwired, Verizon.
5G and 4G LTE (outdoors only)
Search by:
By searching, you agree to: Terms • Privacy • Disclosures