Marin County property record for 115 Underhill Rd, Mill Valley, CA 94941
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4.5 ba · 6,063 sqft · built 1983 |
| Lot Size | 0.406 acres (17,678 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $5,095,000 (Jun 2015) |
| Tax Bill | $76,146 (2025) |
| Deeds & Mortgages | May 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 033-210-24 |
| Primary APN | 033-210-24 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Building Area | 6,063 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1983 |
|---|---|
| Effective Year Built | Effective 1994 |
| Architectural Style | Contemporary |
| Lot Area | 17,678 sqft (0.406 acres) |
| Garage Area | 441 sqft |
| Parking Spaces | 2 Parking Spaces |
| Deck Area | 777 sqft |
| Patio Area | 1,746 sqft |
| Heating System | Central |
|---|
| Street Address | 115 UNDERHILL RD |
|---|---|
| City | MILL VALLEY |
| State | CA |
| Zip | 94941-1461 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 19 |
| Legal Subdivision | SCOTT VLY MDWS |
| Legal Lot Number | 19 |
| Jurisdiction | MARIN CA |
| Township / Civil Division | SOUTHEAST MARIN |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 126200 |
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 | 115 UNDERHILL RD, MILL VALLEY, CA 94941-1461 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 24, 2015 · Amount on Record |
| Deed Sale | Jun 24, 2015 · Amount on Record |
| Deed Document Number | 201530547 |
| Prior Transfer Date | Mar 26, 2002 |
| Prior Transfer Doc | 0000025807 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | MARIN CA |
| Property Address | 115 UNDERHILL RD, MILL VALLEY, CA 94941-1461 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | LAWYERS TITLE COMPANY |
| Name | Verified Name |
|---|
| Document Number | 0000020853 |
|---|---|
| Date | May 27, 2020 |
| Instrument | 2020-0020853 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Address | SAN FRANCISCO, CA 94111 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jun 1, 2050 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 2.5% |
| Type Change Date | Jun 1, 2027 |
| Change Frequency | Monthly |
| Min Rate At Change | 2.95% |
| Index | 1-Year CMT |
| Max Rate | 10.9% |
Source: Marin County assessment roll, as of July 13, 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) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $6,444,770 (+2%) Land $3,487,514 Building $2,957,256 | |
| 2025 | $76,146.00 (+5.26%) | $6,318,433 (+4.04%) Land $3,419,149 Building $2,899,284 |
| 2023 | $72,343.00 (+2.36%) | $6,073,121 Land $3,286,401 Building $2,786,720 |
| 2022 | $70,672.00 |
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 |
| 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 |
|
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 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | None beyond ember reach |
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 192 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 |
May also be available: AT&T, T-Mobile.
5G (outdoors only) and 4G LTE
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