Marin County property record for 23 Rider Ln, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,050 sqft · built 1967 |
| Lot Size | 0.227 acres (9,900 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $885,000 (Jan 2006) |
| Tax Bill | $16,044 (2025) |
| Deeds & Mortgages | Apr 2019 Mortgage |
| Flood Zone | Zone D (undetermined) |
| APN | 046-151-25 |
| Primary APN | 046-151-25 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 2,050 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 1978 |
| Architectural Style | Contemporary |
| Exterior Material | Brick |
| Roof Material | Wood Shingle |
| Lot Area | 9,900 sqft (0.227 acres) |
| Garage Area | 330 sqft |
| Parking Spaces | 1 Parking Space |
| Pool Type | Spa / Hot Tub (No Pool) |
|---|---|
| Porch | Porch |
| Deck Area | 342 sqft |
| Patio Area | 342 sqft |
| Heating System | Central |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 23 RIDGE AVE |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-1792 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | MAP B4 606 |
| Legal Subdivision | MARIN VIEW ACRES |
| Legal Block | 4 |
| Legal Lot Number | 31 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | BOLINAS |
| Census Block Group | 1 |
| Census Block | 1073 |
| 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.
23 Rider Ln is owned and occupied by two individuals who bought it in January 2006.
Source: Marin County records, as of July 13, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 23 RIDER LN, MILL VALLEY, CA 94941-1155 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
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 | Jan 20, 2006 · Amount on File |
| Deed Sale | Jan 20, 2006 · Amount on File |
| Prior Sale | Jun 5, 1998 · Amount on File |
| Deed Document Number | 20064038 |
| Prior Transfer Date | Aug 23, 1994 |
| Prior Transfer Doc | 0000065087 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 23 RIDER LN, MILL VALLEY, CA 94941-1155 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | SOLIDIFI |
| Name | Verified Name |
|---|
| Document Number | 0000011242 |
|---|---|
| Date | Apr 8, 2019 |
| Instrument | 2019-0011242 |
| Name | US BANK NA |
|---|---|
| Type | Bank |
| Address | APPLE VALLEY, CA 92307 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 23 Rider Ln was $16,044 with a homeowner's exemption.
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 | $1,233,495 (+2%) Land $766,579 Building $466,916 | |
| 2025 | $16,044.00 Homeowner's exemption | $1,209,317 Land $751,553 Building $457,764 |
| 2023 | $15,171.00 (+3.74%) Homeowner's exemption | $1,162,367 Land $722,375 Building $439,992 |
| 2022 | $14,624.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 23 Rider Ln 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 23 Rider Ln is moderate, ranking above 57% of the US, with a 0.1% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 57% of the US · lower than 66% of California |
|---|---|
| Wildfire Likelihood | 0.1% 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 205 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: Muir Beach LAN, Verizon.
5G (outdoors only) and 4G LTE
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