Marin County property record for 43 Nelson Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 2,227 sqft · built 1911 |
| Lot Size | 0.335 acres (14,574 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $310,000 (Dec 1997) |
| Tax Bill | $4,257 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 030-061-21 |
| Primary APN | 030-061-21 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Building Area | 2,227 sqft Living Area |
| Basement Area | 1,498 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1911 |
|---|---|
| Effective Year Built | Effective 1958 |
| Lot Area | 14,574 sqft (0.335 acres) |
| Garage Area | 600 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 43 NELSON AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-2119 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | OFFICIAL RECS 2246 PG 322 |
| Legal Subdivision | AMICITA |
| Legal Lot Number | 28 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 126100 |
43 Nelson Ave is owned by a company that bought it in December 1997 and is owner-occupied.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 43 NELSON AVE, MILL VALLEY, CA 94941-2119 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Borrower in Default |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Dec 31, 1997 · Amount on File |
| Deed Sale | Dec 31, 1997 · Amount on File |
| Deed Document Number | 199776399 |
| Prior Transfer Date | Jun 21, 1994 |
| Prior Transfer Doc | 0000051635 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 43 Nelson Ave was $4,257 with a homeowner's exemption.
Source: Marin County assessment roll, as of July 13, 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) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $192,318 (+2%) Land $51,855 Building $140,463 | |
| 2025 | $4,257.00 Homeowner's exemption | $188,546 Land $50,837 Building $137,709 |
| 2023 | $4,620.00 (+13.79%) Homeowner's exemption | $181,226 Land $48,864 Building $132,362 |
| 2022 | $4,060.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 43 Nelson Ave in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | 10.0 ft |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 123 individual policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 147 units insured incl. 24 condo units |
| Nearby Flood Claims | 81 (1979–2026) |
| Claims Outside the SFHA | 8 of 81 |
| Most Recent Claim | Apr 2026 · rainfall accumulation |
| Claims by Event |
|
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 43 Nelson 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 | Indirect within 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 825 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: Etheric Networks, T-Mobile.
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