Marin County property record for 211 William Ave, Larkspur, CA 94939
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,806 sqft · built 1998 |
| Lot Size | 0.857 acres (37,324 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $19,563 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 021-175-36 |
| Primary APN | 021-175-36 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Building Area | 2,806 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1998 |
|---|---|
| Effective Year Built | Effective 1999 |
| Architectural Style | Contemporary |
| Lot Area | 37,324 sqft (0.857 acres) |
| Garage Area | 518 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 499 sqft |
| Patio Area | 499 sqft |
| Heating System | Central |
|---|
| Old Parcel Number | 02117306 |
|---|---|
| Street Address | 211 WILLIAM AVE |
| City | LARKSPUR |
| State | CA |
| Zip | 94939-1533 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | LARKSPUR |
| Jurisdiction | MARIN CA |
| Township / Civil Division | ROSS VALLEY |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 120002 |
211 William Ave is held in a trust since March 2009.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 5970 COUNTY ROAD 109, CARBONDALE, CO 81623-2321 |
| Owner Type | Company |
| Vesting | 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 Transfer Date | Mar 25, 2009 |
| Transfer Doc | 0000016734 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 211 William Ave was $19,563.
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | Larkspur City |
| Elementary School District | Larkspur Elementary School District (KG - 08) |
| Secondary School District | Tamalpais Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,413,159 (+2%) Land $773,575 Building $639,584 | |
| 2025 | $19,563.00 Homeowner's exemption | $1,385,452 Land $758,408 Building $627,044 |
| 2023 | $18,482.00 (+1.36%) Homeowner's exemption | $1,331,663 Land $728,963 Building $602,700 |
| 2022 | $18,234.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 211 William Ave in Zone X, an area of moderate flood risk, though there have been 2 flood claims nearby since 2014.
Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 23 policies |
| Nearby Flood Policies | 23 in force |
| Nearby Flood Claims | 2 (2014–2017) |
| Most Recent Claim | Jan 2017 · Severe Winter Storms, Flooding, And Mudslides |
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 211 William Ave is low, with a 0.02% 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 | 0.02% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 663 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: Verizon.
5G (outdoors only) and 4G LTE
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