15 Underhill Rd, Mill Valley, CA 94941 Property Records

Marin County property record for 15 Underhill Rd, Mill Valley, CA 94941

Property Summary

Property Type	Single Family Home
Details	4 bd · 3 ba · 2,234 sqft · built 1961
Lot Size	0.242 acres (10,560 sqft)
Owner	2 Individuals on Record
Last Sale	$2,550,000 (Apr 2026)
Tax Bill	$14,843 (2025)
Deeds & Mortgages	Apr 2026 Sale & Mortgage May 2021 Transfer + 1 more
Flood Zone	Zone X (minimal risk)
APN	`033-152-06`

Property Details

APN / Parcel Number

Primary APN	`033-152-06`

Interior

Bedrooms	4 Beds
Full Baths	3 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	2,234 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1961
Effective Year Built	Effective 1968
Architectural Style	Contemporary
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Tar & Gravel
Lot Area	10,560 sqft (0.242 acres)
Garage Area	588 sqft
Parking Spaces	2 Parking Spaces
Deck Area	428 sqft
Patio Area	428 sqft

Utilities, Heating & Cooling

Heating System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	15 UNDERHILL RD
City	MILL VALLEY
State	CA
Zip	94941-1423
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Subdivision	SCOTT VLY 01
Legal Lot Number	20
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	1
Census Block	1009
Census Tract	126200

Owner

Source: Marin County assessment roll, 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 Individuals on Record
Mailing Address	15 UNDERHILL RD, MILL VALLEY, CA 94941-1423
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Date	Document
Apr 20, 2026	Grant Deed, Transfer · Conventional Mortgage REDWOOD CREDIT UNION
May 5, 2021	Intrafamily Transfer, Transfer AMROCK LLC
May 5, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage QUICKEN LOANS LLC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 20, 2026 · Amount on Record
Deed Sale	Apr 20, 2026 · Amount on Record
Prior Sale	Mar 6, 1998 · Amount on Record
Deed Document Number	202611488
Prior Transfer Date	Feb 27, 2021
Prior Transfer Doc	0000030404
Record Updated	Sep 20, 2026

April 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Apr 20, 2026
Property Address	15 UNDERHILL RD, MILL VALLEY, CA 94941-1423
Document Number	0000011488
Instrument Date	Apr 13, 2026
Instrument	202611488
Transaction Type	Transfer
Record Updated	Jul 6, 2026
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE COMPAN

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$283,305.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	15 UNDERHILL RD, MILL VALLEY, CA 94941-1423

Mortgage

Document Number	0000011489,
Date	Apr 20, 2026
Instrument	202611489

Lender

Name	REDWOOD CREDIT UNION

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	May 1, 2056

Interest

Rate Type	Adjustable Rate
Rate	5.88%
Initial Type	Adjustable Rate
Adjustable	Adjustable Rate Rider
Max Rate	-1%

May 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	May 5, 2021
Property Address	15 UNDERHILL RD, MILL VALLEY, CA 94941-1423
Document Number	0000030404
Map Reference	VOL 10 PG 69
Instrument Date	Feb 27, 2021
Instrument	2021-0030404
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	AMROCK LLC

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	15 UNDERHILL RD, MILL VALLEY, CA 94941-1423

May 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	May 5, 2021
Property Address	15 UNDERHILL RD, MILL VALLEY, CA 94941-1423
Document Number	0000030402
Map Reference	VOL 10 PG 69
Instrument Date	Feb 27, 2021
Instrument	2021-0030402
Transaction Type	Transfer
Record Updated	Jun 16, 2021
Title Company	AMROCK INC, AMROCK LLC

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	15 UNDERHILL RD, MILL VALLEY, CA 94941-1423

Mortgage

Document Number	0000030403
Date	May 5, 2021
Instrument	2021-0030403

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	358 Months
Due	Mar 1, 2051

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		$977,147 (+2%) Land $561,762 Building $415,385
2025	$14,843.00 (-9.59%)	$957,989 (+4.04%) Land $550,748 Building $407,241
2023	$16,417.00 (+19.68%)	$920,795 Land $529,365 Building $391,430
2022	$13,717.00

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.

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 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 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 105 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.

Cell Coverage

5G and 4G LTE (outdoors only)

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