Marin County property record for 8 Underhill Rd, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 1,914 sqft · built 1962 |
| Lot Size | 0.242 acres (10,560 sqft) |
| Owner | Individual Name on File |
| Last Sale | $522,000 (Jan 1998) |
| Tax Bill | $11,466 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 033-143-04 |
| Primary APN | 033-143-04 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,914 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1962 |
|---|---|
| Effective Year Built | Effective 1965 |
| Architectural Style | Contemporary |
| Exterior Material | Wood |
| Roof Material | Composition Shingle |
| Lot Area | 10,560 sqft (0.242 acres) |
| Garage Area | 345 sqft |
| Parking Spaces | 1 Parking Space |
| Deck Area | 250 sqft |
| Patio Area | 250 sqft |
| Heating System | Central |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 8 UNDERHILL RD |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-1424 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RS10 |
| Legal Description | MAP F2 606 |
| Legal Subdivision | SCOTT VLY 01 |
| Legal Tract | 1 |
| Legal Lot Number | 12 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 126200 |
Source: Marin County assessment roll, APN 033-143-04, as of July 13, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 8 UNDERHILL RD, MILL VALLEY, CA 94941-1424 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Jan 16, 1998 · Amount on Record |
| Deed Sale | Jan 16, 1998 · Amount on Record |
| Deed Document Number | 19982815 |
| Last Transfer Date | Jun 19, 2013 |
| Transfer Doc | 0000043584 |
| Record Updated | Sep 20, 2026 |
Source: Marin County assessment roll as of July 13, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Marin County |
| Municipality | Mill Valley City |
| Elementary School District | Mill Valley Elementary School District (KG - 08) |
| Secondary School District | Tamalpais Union High School District (09 - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $846,861 (+2%) Land $589,088 Building $257,773 | |
| 2025 | $11,466.00 (+3.77%) Homeowner's exemption | $830,257 (+4.04%) Land $577,538 Building $252,719 |
| 2023 | $11,049.00 (+2.04%) Homeowner's exemption | $798,022 Land $555,115 Building $242,907 |
| 2022 | $10,828.00 |
Source: FEMA National Flood Hazard Layer, Marin County (06041C), as of October 18, 2023 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060411262001, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 86 individual policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 108 units insured incl. 22 condo units |
| Nearby Flood Claims | 9 (1982–2019) |
| Claims Outside the SFHA | 1 of 9 |
| Most Recent Claim | Feb 2019 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
| Wildfire Risk | Low lower than 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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: FCC Broadband Data Collection, 105 locations within half a mile, as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: AT&T.
5G and 4G LTE (outdoors only)
Source: EPA Safe Drinking Water Information System, water system CA2110002, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | MARIN MUNICIPAL WATER DISTRICT serves 188,116 people |
|---|---|
| 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 as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.
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