Marin County property record for 123 Walnut Ave, Mill Valley, CA 94941 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 2,190 sqft · built 1910 |
| Lot Size | 0.138 acres (6,000 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $6,072 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 030-051-15 |
| Primary APN | 030-051-15 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,190 sqft Living Area |
| Basement Area | 587 sqft |
| Year Built | Built 1910 |
|---|---|
| Effective Year Built | Effective 1935 |
| Architectural Style | Contemporary |
| Lot Area | 6,000 sqft (0.138 acres) |
| Heating System | Central |
|---|
| Street Address | 123 WALNUT AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-2813 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | TAMALPAIS PARK |
| Legal Lot Number | 108 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 3 |
| Census Block | 3011 |
| Census Tract | 126100 |
Source: Marin County records · APN 030-051-15
Assessment roll updated July 13, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 123 WALNUT AVE, MILL VALLEY, CA 94941-2813 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Transfer Date | Aug 12, 2005 |
| Transfer Doc | 0000063501 |
| Record Updated | Sep 20, 2026 |
Source: Marin County records · Assessment roll updated July 13, 2026 · Last verified July 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) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $182,380 (+2%) Land $41,261 Building $141,119 | |
| 2025 | $6,072.00 (+3.25%) Homeowner's exemption | $178,804 (+4.04%) Land $40,452 Building $138,352 |
| 2023 | $5,881.00 (+6.97%) Homeowner's exemption | $171,861 Land $38,881 Building $132,980 |
| 2022 | $5,498.00 |
Source: FEMA National Flood Hazard Layer, Marin County (06041C), updated October 18, 2023 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060411261003, 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 |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Cost | Premium on Record median of 61 individual NFIP policies nearby |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 69 units insured 8 under condo master policies |
| Nearby Flood Claims | 43 (1979–2024) |
| Claims Outside the SFHA | 6 of 43 |
| Most Recent Claim | Dec 2024, river or lake flooding |
| Claims By Storm |
|
| Wildfire Risk | Low above 20% of the US · above 11% of California |
|---|---|
| Wildfire Likelihood | About 1 in 10,000 per year |
| Exposure | Indirect within 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 825 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 |
| Verizon | Fixed Wireless | 300 / 20 |
May also be available at this address: AT&T, T-Mobile USA, Etheric Communications, LLC.. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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