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9 Underhill Rd, Mill Valley, CA 94941 Property Records

Marin County property record for 9 Underhill Rd, Mill Valley, CA 94941 · Last verified August 2026

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 2,467 sqft · built 1965
Lot Size0.266 acres (11,600 sqft)
Owner2 Individual Names on File
Last Sale$2,810,000 (May 2026)
Tax Bill$35,079 (2025)
Deeds & MortgagesMay 2026 Sale & Mortgage
Flood ZoneZone X (minimal risk)
APN033-142-02

Property Details

APN / Parcel Number

Primary APN033-142-02

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Building Area2,467 sqft Living Area
Basement Area189 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1965
Effective Year BuiltEffective 1965
Architectural StyleContemporary
Lot Area11,600 sqft (0.266 acres)
Garage Area552 sqft
Parking Spaces2 Parking Spaces
Deck Area781 sqft
Patio Area781 sqft

Utilities, Heating & Cooling

Heating SystemCentral

Location & Zoning

Street Address9 UNDERHILL RD
CityMILL VALLEY
StateCA
Zip94941-1423
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionMAP 10 PG 69 LOT 22
Legal SubdivisionSCOTT VLY 01
Legal Tract1
Legal Lot Number22
JurisdictionMARIN CA
Township / Civil DivisionSOUTHEAST MARIN
Census Block Group1
Census Block1009
Census Tract126200

Owner

Source: Marin County records · APN 033-142-02

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 Record2 Individual Names on File
Mailing Address9 UNDERHILL RD, MILL VALLEY, CA 94941-1423
OccupancyOwner Occupied
Owner TypeIndividual
VestingCommunity Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleMay 06, 2026 · Amount on Record
Deed SaleMay 06, 2026 · Amount on Record
Deed Document Number202613200
Prior Transfer DateJan 08, 2025
Prior Transfer Doc0000001169
Record UpdatedSep 20, 2026

May 2026: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionMARIN CA
Recording DateMay 06, 2026
Property Address9 UNDERHILL RD, MILL VALLEY, CA 94941-1423
Document Number0000013200
Instrument DateApr 20, 2026
Instrument2026.13200
Transaction TypeTransfer
Record UpdatedMay 14, 2026
Title CompanyOLD REPUBLIC TITLE

Transaction

AmountAmount Recorded
DownpaymentDownpayment on File
Loan-to-Value (LTV)LTV on Record
Tax$312,191.00
Amount AccuracyFull Amount Stated
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCommunity Property
Address9 UNDERHILL RD, MILL VALLEY, CA 94941-1423
InvestorPossibly a Property Investor

Mortgage

Document Number0000013201,
DateMay 06, 2026
Instrument2026..13201
Lender
NameWELLSFARGOBANKNA
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term360 Months
DueJun 01, 2056
Interest
Rate TypeAdjustable Rate
Rate5.25%
Initial TypeAdjustable Rate
AdjustableAdjustable Rate Rider
Max Rate-1%

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 and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

YearTax BillAssessed Value
2026$2,652,000 (+2%) Land $1,734,000 Building $918,000
2025$35,079.00 (+492.95%)$2,600,000 (+1,125.94%) Land $1,700,000 Building $900,000
2023$5,916.00 (+2.37%) Homeowner's exemption$212,083 Land $54,199 Building $157,884
2022$5,779.00

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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