Marin County property record for 439 Wellesley Ave, Mill Valley, CA 94941 · Last verified August 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,913 sqft · built 1983 |
| Lot Size | 0.675 acres (29,400 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $15,016 (2025) |
| Deeds & Mortgages | Apr 2023 Mortgage Jan 2023 Transfer + 2 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 050-061-48 |
| Primary APN | 050-061-48 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Building Area | 2,913 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1983 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | Contemporary |
| Lot Area | 29,400 sqft (0.675 acres) |
| Garage Area | 484 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 1,148 sqft |
| Patio Area | 1,148 sqft |
| Heating System | Central |
|---|
| Street Address | 439 WELLESLEY AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-4103 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MAP 18 PG 25 LOT 4 |
| Legal Subdivision | WELLESLEY AVE |
| Legal Lot Number | 4 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 128100 |
Source: Marin County records · APN 050-061-48
Assessment roll updated July 13, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Apr 26, 2023 | Deed of Trust, Mortgage · Commercial Mortgage CHRISTINE JOYCE MUMFORD REVOCABLE TRUST |
| Jan 17, 2023 | Intrafamily Transfer, Transfer |
| Jan 17, 2023 | Intrafamily Transfer, Transfer |
| Aug 18, 2017 | Quit Claim Deed, Transfer ATTORNEY ONLY |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | Dec 13, 2022 |
| Transfer Doc | 0000000858 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Transaction Type | Mortgage |
| Record Updated | Jun 08, 2026 |
| Name | Verified Name |
|---|---|
| Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Document Number | 0000010605 |
|---|---|
| Date | Apr 26, 2023 |
| Instrument | 2023-0010605 |
| Name | CHRISTINE JOYCE MUMFORD REVOCABLE TRUST |
|---|---|
| Type | Private Party |
| Address | 405 GOLDEN OAK DR, PORTOLA VALLEY, CA 94028 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount Recorded |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | MARIN CA |
| Recording Date | Jan 17, 2023 |
| Property Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Document Number | 0000000858 |
| Map Reference | VOL 18 PG 25 |
| Instrument Date | Dec 13, 2022 |
| Instrument | 2023-0000858 |
| Transaction Type | Transfer |
| Record Updated | Feb 01, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | MARIN CA |
| Recording Date | Jan 17, 2023 |
| Property Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Document Number | 0000000859 |
| Map Reference | VOL 18 PG 25 |
| Instrument Date | Dec 13, 2022 |
| Instrument | 2023-0000859 |
| Transaction Type | Transfer |
| Record Updated | Feb 01, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | MARIN CA |
| Recording Date | Aug 18, 2017 |
| Property Address | 439 WELLESLEY AVE, MILL VALLEY, CA 94941-4103 |
| Document Number | 0000033172 |
| Instrument Date | Aug 11, 2017 |
| Instrument | 33172 |
| Transaction Type | Transfer |
| Record Updated | Aug 31, 2017 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 439 WELLESLEY AVE MILL VALLEY CA 949414103, MILL VALLEY, CA 94941-4103 |
| Investor | Possibly a Property Investor |
Source: Marin County records · Assessment roll updated July 13, 2026 · Last verified August 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) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $738,002 (+2%) Land $238,791 Building $499,211 | |
| 2025 | $15,016.00 (+6.2%) Homeowner's exemption | $723,534 (+4.04%) Land $234,110 Building $489,424 |
| 2023 | $14,139.00 (+1.98%) Homeowner's exemption | $695,440 Land $225,020 Building $470,420 |
| 2022 | $13,864.00 |
Source: FEMA National Flood Hazard Layer, Marin County (06041C), updated October 18, 2023 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060411281001, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| 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, tidal / storm surge, Severe Winter Storms And Flooding |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 707 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| AT&T | Fiber | 5,000 / 5,000 |
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: T-Mobile USA, Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
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