Marin County property record for 159 Alder Ave, San Anselmo, CA 94960
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1.5 ba · 1,889 sqft · built 1912 |
| Lot Size | 0.294 acres (12,825 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $265,000 (Oct 1994) |
| Tax Bill | $7,948 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 007-041-46 |
| Primary APN | 007-041-46 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 5 Rooms |
| Building Area | 1,889 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1912 |
|---|---|
| Effective Year Built | Effective 1947 |
| Architectural Style | Contemporary |
| Lot Area | 12,825 sqft (0.294 acres) |
| Deck Area | 278 sqft |
| Patio Area | 278 sqft |
| Heating System | Floor/Wall Furnace |
|---|
| Street Address | 159 ALDER AVE |
|---|---|
| City | SAN ANSELMO |
| State | CA |
| Zip | 94960-1744 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | LOT 80 |
| Legal Subdivision | YOLANDA COURT MAP 02 |
| Legal Lot Number | 80 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | ROSS VALLEY |
| Census Block Group | 1 |
| Census Block | 1016 |
| Census Tract | 116000 |
159 Alder Ave is owner-occupied and held in a trust since December 2024.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 159 ALDER AVE, SAN ANSELMO, CA 94960-1744 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
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 | Oct 31, 1994 · Amount on File |
| Deed Sale | Oct 31, 1994 · Amount on File |
| Deed Document Number | 199476326 |
| Last Transfer Date | Dec 2, 2024 |
| Transfer Doc | 0000001928 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 159 Alder Ave was $7,948 with a homeowner's exemption.
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | San Anselmo Town |
| Elementary School District | Ross Valley Elementary School District (KG - 08) |
| Secondary School District | Tamalpais Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $521,403 (+2%) Land $256,971 Building $264,432 | |
| 2025 | $7,948.00 Homeowner's exemption | $511,179 Land $251,932 Building $259,247 |
| 2023 | $7,623.00 (+1.4%) Homeowner's exemption | $491,333 Land $242,151 Building $249,182 |
| 2022 | $7,518.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 159 Alder 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 | Varies along the reach; see FIRM |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 76 individual policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 104 units insured incl. 28 condo units |
| Nearby Flood Claims | 52 (1978–2023) |
| Claims Outside the SFHA | 18 of 52 |
| Most Recent Claim | Jan 2023 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| 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 159 Alder Ave is low, with a 0.05% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 64% of the US · lower than 79% of California |
|---|---|
| Wildfire Likelihood | 0.05% 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 810 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 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Unwired.
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