Marin County property record for 23 Walnut Ave, Mill Valley, CA 94941 · Last verified July 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 2 Baths |
| Year Built | Built 1964 |
| Square Footage | 2,416 sqft Living Area |
| Lot Size | 8,525 sqft (0.196 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $1,550,000 (2004) |
| Tax Bill | $26,431.00 (2025) |
| Primary APN | 028-233-33 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 2,416 sqft Living Area |
| Fireplace | Fireplace |
| Fireplaces | 1 Fireplaces |
| Year Built | Built 1947 |
|---|---|
| Effective Year Built | Effective 1964 |
| Architectural Style | Duplex Single Style |
| Lot Area | 8,525 sqft (0.196 acres) |
| Garage Area | 516 sqft Garage |
| Deck Area | 1,609 sqft Deck |
| Patio Area | 179 sqft Patio |
| Heating System | Central Heating |
|---|
| Street Address | 23 WALNUT AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-2705 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | LOT 240,241 |
| Legal Subdivision | TAMALPAIS PARK |
| Legal Lot Number | 240 |
| Jurisdiction | MARIN CA |
| Minor Civil Division | SOUTHEAST MARIN |
| Census Blockgroup | 3 |
| Census Block | 3002 |
| Census Tract | 126100 |
Source: Marin County records · APN 028-233-33
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 | 23 WALNUT AVE, MILL VALLEY, CA 94941-2705 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is a Company |
| Vesting | Owner is a Trust, Family Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Sep 24, 2004 · Amount on Record |
| Deed Sale | Sep 24, 2004 · Amount on Record |
| Deed Doc Number | 200483077 |
| Prior Transfer Date | Feb 26, 2002 |
| Prior Transfer Doc | 0000015632 |
| Record Refreshed | 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 | $2,687,320 (+38.52%) Land $1,137,320 Building $1,550,000 | |
| 2025 | $26,431.00 (+68.83%) | $1,940,024 (+81.02%) Land $1,115,024 Building $825,000 |
| 2023 | $15,655.00 (-40.27%) | $1,071,736 Land $1,071,736 |
| 2022 | $26,208.00 |
Source: FEMA National Flood Hazard Layer, Marin County (06041C), updated October 18, 2023 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone AE |
|---|---|
| Flood Hazard | High |
| 100-Year Floodplain | Yes 1% annual chance |
| Special Flood Hazard Area | Yes |
| Flood Insurance Requirement | Required (federally backed mortgages) |
| Floodway | No |
| Base Flood Elevation | Varies along the reach; see FIRM |
| 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; lenders make the official flood determination.
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