Marin County property record for 20 Hamilton Ln, Mill Valley, CA 94941
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 1,200 sqft · built 1931 |
| Lot Size | 0.235 acres (10,250 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $715,000 (Apr 2004) |
| Tax Bill | $12,303 (2025) |
| Deeds & Mortgages | Jan 2017 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 045-043-04 |
| Primary APN | 045-043-04 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Units | 2 Units |
| Building Area | 1,200 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1931 |
|---|---|
| Effective Year Built | Effective 1940 |
| Architectural Style | Contemporary |
| Lot Area | 10,250 sqft (0.235 acres) |
| Deck Area | 147 sqft |
| Patio Area | 147 sqft |
| Street Address | 20 HAMILTON LN |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-1772 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Subdivision | PIPELINE |
| Legal Lot Number | 5,6,4 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 128200 |
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 | 2 Company Names on Record |
|---|---|
| Mailing Address | PO BOX 819, MILL VALLEY, CA 94942-0819 |
| Owner Type | Company |
| Vesting | Borrower in Default |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 27, 2004 · Amount on Record |
| Deed Sale | Apr 27, 2004 · Amount on Record |
| Deed Document Number | 200434980 |
| Last Transfer Date | Sep 27, 2005 |
| Transfer Doc | 0000077511 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | MARIN CA |
| Recording Date | Jan 30, 2017 |
| Property Address | 20 HAMILTON LN, MILL VALLEY, CA 94941-1772 |
| Document Number | 0000004137 |
| Instrument Date | Jan 24, 2017 |
| Instrument | 4137 |
| Transaction Type | Transfer |
| Record Updated | Feb 7, 2017 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | PO BOX 819 MILL VALLEY CA 949420819, MILL VALLEY, CA 94942-0819 |
Source: Marin County assessment roll, as of July 13, 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| 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 | $884,585 (+2%) Land $797,577 Building $87,008 | |
| 2025 | $12,303.00 (+5.88%) | $867,242 (+4.04%) Land $781,940 Building $85,302 |
| 2023 | $11,620.00 (+3.7%) | $833,570 Land $751,580 Building $81,990 |
| 2022 | $11,205.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 1 (2024) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 2024 · other causes |
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 | Moderate above 59% of the US · lower than 64% of California |
|---|---|
| Wildfire Likelihood | 0.2% 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 144 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: Muir Beach LAN, Verizon.
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