Marin County property record for 28 Ridge Ave, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 1 bd · 1 ba · 376 sqft · built 1930 |
| Lot Size | 0.272 acres (11,850 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $3,306 (2025) |
| Flood Zone | Zone D (undetermined) |
| APN | 046-131-20 |
| Primary APN | 046-131-20 |
|---|
| Bedrooms | 1 Bed |
|---|---|
| Full Baths | 1 Bath |
| Building Area | 376 sqft Living Area |
| Basement Area | 170 sqft |
| Year Built | Built 1930 |
|---|---|
| Effective Year Built | Effective 1930 |
| Architectural Style | Contemporary |
| Lot Area | 11,850 sqft (0.272 acres) |
| Street Address | 28 RIDGE AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Subdivision | MUIR WOODS PARK 01 |
| Legal Block | D |
| Legal Lot Number | 22-26 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | BOLINAS |
| Census Block Group | 1 |
| Census Block | 1069 |
| Census Tract | 131100 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Listed Area | Within Dipsea Trail, The listed 2010 · 1 contributing resources · NRIS 10000356 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
28 Ridge Ave is held in a trust since June 2002.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 560 PANORAMIC HWY, MILL VALLEY, CA 94941-5038 |
| 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 | Jun 28, 2002 |
| Transfer Doc | 0000063040 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 28 Ridge Ave was $3,306.
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 | $84,718 (+2%) Land $25,415 Building $59,303 | |
| 2025 | $3,306.00 | $83,057 Land $24,917 Building $58,140 |
| 2023 | $3,053.00 (+3.81%) | $79,832 Land $23,949 Building $55,883 |
| 2022 | $2,941.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 28 Ridge Ave in Zone D, where flood risk has not been studied, though there have been 5 flood claims nearby since 1982.
Source: FEMA National Flood Hazard Layer, effective October 18, 2023 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone D undetermined · not studied |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 5 (1982–2018) |
| Claims Outside the SFHA | 3 of 5 |
| Most Recent Claim | Apr 2018 · rainfall accumulation |
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 28 Ridge Ave is moderate, ranking above 61% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 61% of the US · lower than 63% 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 8 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Xfinity Cable | 1,200 / 35 |
| Starlink Satellite | 280 / 30 |
| Muir Beach LAN Fixed Wireless | 125 / 125 |
| Verizon Fixed Wireless | 25 / 6 |
5G and 4G LTE (outdoors only)
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