Marin County property record for 110 William Ave, Larkspur, CA 94939
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,965 sqft · built 1926 |
| Lot Size | 0.144 acres (6,250 sqft) |
| Owner | Company Name on Record |
| Last Sale | $2,100,000 (Mar 2025) |
| Tax Bill | $22,519 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 021-104-14 |
| Primary APN | 021-104-14 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,965 sqft Living Area |
| Basement Area | 357 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1926 |
|---|---|
| Effective Year Built | Effective 1933 |
| Architectural Style | Contemporary |
| Lot Area | 6,250 sqft (0.144 acres) |
| Garage Area | 216 sqft |
| Parking Spaces | 1 Parking Space |
| Deck Area | 132 sqft |
| Heating System | Central |
|---|
| Street Address | 110 WILLIAM AVE |
|---|---|
| City | LARKSPUR |
| State | CA |
| Zip | 94939-2028 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | BALTIMORE PARK |
| Legal Block | H |
| Jurisdiction | MARIN CA |
| Township / Civil Division | ROSS VALLEY |
| Census Block Group | 3 |
| Census Block | 3021 |
| Census Tract | 120002 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Larkspur Downtown Historic District listed 1982 · 42 contributing resources · NRIS 82000972 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: Marin County records, as of July 13, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 110 WILLIAM AVE, LARKSPUR, CA 94939-2028 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Mar 14, 2025 · Amount on Record |
| Deed Sale | Mar 14, 2025 · Amount on Record |
| Deed Document Number | 20255807 |
| Prior Transfer Date | Jan 19, 2024 |
| Prior Transfer Doc | 0000002457 |
| Record Updated | Sep 20, 2026 |
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 | $2,142,000 (+30.72%) Land $1,428,000 Building $714,000 | |
| 2025 | $22,519.00 (+320.92%) | $1,638,630 (+1,122.9%) Land $1,300,500 Building $338,130 |
| 2023 | $5,350.00 (+3.3%) | $133,995 Land $44,218 Building $89,777 |
| 2022 | $5,179.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
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 |
| Nearest Special Flood Hazard Area | Zone A, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 3 in force |
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: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 66% of the US · lower than 80% of California |
|---|---|
| Wildfire Likelihood | 0.03% 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 448 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 |
May also be available: T-Mobile, Unwired.
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