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23 Underhill Rd, Mill Valley, CA 94941 Property Records

Marin County property record for 23 Underhill Rd, Mill Valley, CA 94941 · Last verified August 2026

Property Summary

Property TypeSingle Family Home
Details4 bd · 2 ba · 2,179 sqft · built 1960
Lot Size0.253 acres (11,040 sqft)
OwnerIndividual Name on File
Last Sale$70,000 (Oct 2000)
Tax Bill$13,960 (2025)
Deeds & MortgagesMar 2017 Line of Credit
Oct 2021 Mortgage
Flood ZoneZone X (minimal risk)
APN033-152-02

Property Details

APN / Parcel Number

Primary APN033-152-02

Interior

Bedrooms4 Beds
Full Baths2 Baths
Building Area2,179 sqft Living Area
Basement Area187 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1960
Effective Year BuiltEffective 1966
Architectural StyleContemporary
Lot Area11,040 sqft (0.253 acres)
Garage Area625 sqft
Parking Spaces2 Parking Spaces
Deck Area135 sqft
Patio Area135 sqft

Utilities, Heating & Cooling

Heating SystemCentral

Location & Zoning

Street Address23 UNDERHILL RD
CityMILL VALLEY
StateCA
Zip94941-1423
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionL16 /B10P69 M SCOTT VALLEY #1
Legal SubdivisionSCOTT VLY 01
Legal Tract1
Legal Lot Number16
JurisdictionMARIN CA
Township / Civil DivisionSOUTHEAST MARIN
Census Block Group1
Census Block1009
Census Tract126200

Owner

Source: Marin County records · APN 033-152-02

Assessment roll updated 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 RecordIndividual Name on File
Mailing Address23 UNDERHILL RD, MILL VALLEY, CA 94941-1423
OccupancyOwner Occupied
Owner TypeIndividual

Deeds, Mortgages & Sale History

DateDocument
Mar 06, 2017Deed of Trust, Mortgage · Line of Credit
WELLS FARGO BANK NA
Oct 12, 2021Deed of Trust, Mortgage · Conventional Mortgage
JPMORGAN CHASE BANK NA

Assessor's Deed Record

Deed NamesVerified Name on Deed
Last SaleOct 25, 2000 · Amount on Record
Deed SaleOct 25, 2000 · Amount on Record
Prior SaleJun 27, 1995 · Amount on Record
Deed Document Number200054441
Last Transfer DateJun 28, 2024
Transfer Doc0000021332
Record UpdatedSep 20, 2026

March 2017: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionMARIN CA
Property Address23 UNDERHILL RD, MILL VALLEY, CA 94941-1423
Transaction TypeMortgage
Record UpdatedJul 21, 2022

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000009715
DateMar 06, 2017
Instrument2017-0009715
Lender
NameWELLS FARGO BANK NA
TypeBank
AddressFORT MILL, SC 29715
Agreement
TypeLine of Credit
AmountAmount Recorded
Term360 Months
DueMar 22, 2047

October 2021: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionMARIN CA
Property Address23 UNDERHILL RD, MILL VALLEY, CA 94941-1423
Transaction TypeMortgage
Record UpdatedJul 21, 2022
Title CompanyAMROCK TITLE CALIFORNIA INC

Transferred To (Grantee/Buyer)

NameVerified Name
Address23 UNDERHILL RD, MILL VALLEY, CA 94941-1423

Mortgage

Document Number0000062466
DateOct 12, 2021
Instrument2021-0062466
Lender
NameJPMORGAN CHASE BANK NA
TypeBank
AddressCOLUMBUS, OH 43240
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term360 Months
DueOct 01, 2051

Tax Assessment & Valuation

Source: Marin County records · Assessment roll updated July 13, 2026 · Last verified August 2026

Property Jurisdictions

TypeName
StateCalifornia
CountyMarin County
MunicipalityMill Valley City
Elementary School DistrictMill Valley Elementary School District (KG - 08)
Secondary School DistrictTamalpais Union High School District (09 - 12)

Tax Bill & Assessment History

Assessed value is set for property tax purposes and is not a market price estimate.

YearTax BillAssessed Value
2026$991,862 (+2%) Land $548,204 Building $443,658
2025$13,960.00 (+15.93%) Homeowner's exemption$972,414 (+4.04%) Land $537,456 Building $434,958
2023$12,042.00 (+3.37%) Homeowner's exemption$934,659 Land $516,588 Building $418,071
2022$11,649.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Marin County (06041C), updated October 18, 2023 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060411262001, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood ZoneZone X
Special Flood Hazard AreaNo
Flood HazardMinimal
500-Year FloodplainNo
Flood Insurance CostPremium on Record
median of 86 individual NFIP policies nearby
Community Rating SystemClass 6 (20% premium discount)
Nearby Flood Policies108 units insured
22 under condo master policies
Nearby Flood Claims9 (1982–2019)
Claims Outside the SFHA1 of 9
Most Recent ClaimFeb 2019, other causes, Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims By Storm
  • Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 4 claims

Wildfire

Wildfire RiskLow
above 32% of the US · above 19% of California
Wildfire LikelihoodAbout 1 in 3,571 per year
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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.

Internet Providers

Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 105 locations within about half a mile of this property

ProviderTechnologyDownload / Upload (Mbps)
XfinityCable2,000 / 250
UnwiredFixed Wireless300 / 25

May also be available at this address: AT&T. Availability varies by address; speeds are provider-advertised maximums, not measured.

Mobile Coverage

5G and 4G LTE (outdoors only)

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