40 Underhill Rd, Mill Valley, CA 94941 Property Records

Marin County property record for 40 Underhill Rd, Mill Valley, CA 94941

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,468 sqft · built 1965
Lot Size	0.207 acres (9,016 sqft)
Owner	2 Company Names on Record
Tax Bill	$8,456 (2025)
Deeds & Mortgages	Mar 2026 Transfer Apr 2020 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`033-182-05`

Property Details

APN / Parcel Number

Primary APN	`033-182-05`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Building Area	2,468 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1965
Effective Year Built	Effective 1977
Architectural Style	Contemporary
Lot Area	9,016 sqft (0.207 acres)
Garage Area	508 sqft
Parking Spaces	2 Parking Spaces
Deck Area	422 sqft
Patio Area	422 sqft

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	40 UNDERHILL RD
City	MILL VALLEY
State	CA
Zip	94941-1437
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Subdivision	SCOTT VLY 03
Legal Lot Number	108
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	1
Census Block	1007
Census Tract	126200

Owner

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	40 UNDERHILL RD, MILL VALLEY, CA 94941-1437
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 26, 2026	Intrafamily Transfer, Transfer
Apr 27, 2020	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LNS
Feb 5, 2018	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LNS

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Nov 26, 1993
Transfer Doc	0000100444
Record Updated	Oct 29, 2026

March 2026: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Mar 26, 2026
Property Address	40 UNDERHILL RD, MILL VALLEY, CA 94941-1437
Document Number	0000008837
Map Reference	VOL 12 PG 78
Instrument Date	Mar 18, 2026
Instrument	2026-0008837
Transaction Type	Transfer
Record Updated	Apr 8, 2026

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name
Address	40 UNDERHILL RD, MILL VALLEY, CA 94941-1437

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	40 UNDERHILL RD, MILL VALLEY, CA 94941-1437

April 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	40 UNDERHILL RD, MILL VALLEY, CA 94941-1437
Document Number	0000026588
Instrument Date	Apr 27, 2020
Transaction Type	Mortgage
Record Updated	Jul 14, 2020
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	40 UNDERHILL RD MILL VALLEY CA 949411437, MILL VALLEY, CA 94941-1437

Mortgage

Document Number	0000026588
Date	Jun 25, 2020
Instrument	26588

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Jun 24, 2050

Interest

Rate Type	Adjustable Rate
Rate	2.5%

February 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	40 UNDERHILL RD, MILL VALLEY, CA 94941-1437
Document Number	0000004417
Instrument Date	Feb 5, 2018
Transaction Type	Mortgage
Record Updated	Feb 27, 2018
Title Company	TSI TITLE COMPANY/CA INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	40 UNDERHILL RD MILL VALLEY CA 949411437, MILL VALLEY, CA 94941-1437

Mortgage

Document Number	0000004417
Date	Feb 13, 2018
Instrument	4417

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Feb 12, 2048

Interest

Rate Type	Adjustable Rate
Rate	3.87%

Tax Assessment & Valuation

Source: Marin County assessment roll, as of July 13, 2026

Property Jurisdictions

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)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$463,999 (+2%) Land $62,506 Building $401,493
2025	$8,456.00 (+24.63%) Homeowner's exemption	$454,903 (+4.04%) Land $61,281 Building $393,622
2023	$6,785.00 (+5.36%) Homeowner's exemption	$437,240 Land $58,901 Building $378,339
2022	$6,440.00

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

Flood

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	Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 4 claims

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

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	0.01% annual chance
Exposure	Indirect within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

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.

Cell Coverage

5G and 4G LTE (outdoors only)

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