21 Marlin Ave, Mill Valley, CA 94941 Property Records

Marin County property record for 21 Marlin Ave, Mill Valley, CA 94941

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 2,072 sqft · built 1958
Lot Size	0.165 acres (7,200 sqft)
Owner	2 Company Names on Record
Tax Bill	$13,776 (2025)
Deeds & Mortgages	Apr 2021 Transfer Apr 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`029-203-23`

Property Details

APN / Parcel Number

Primary APN	`029-203-23`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	2,072 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1975
Architectural Style	Contemporary
Exterior Material	Wood
Roof Material	Tar & Gravel
Lot Area	7,200 sqft (0.165 acres)
Deck Area	354 sqft
Patio Area	354 sqft

Utilities, Heating & Cooling

Heating System	Central
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	21 MARLIN AVE
City	MILL VALLEY
State	CA
Zip	94941-1373
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	RS10
Legal Description	MAP E3 606
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	1
Census Block	1005
Census Tract	126100

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	21 MARLIN AVE, MILL VALLEY, CA 94941-1373
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Borrower in Default

Deeds, Mortgages & Sale History

Date	Document
Apr 16, 2021	Intrafamily Transfer, Transfer SPRUCE TITLE COMPANY
Apr 16, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage QUICKEN LOANS LLC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Sep 22, 2020
Transfer Doc	0000025935
Record Updated	Oct 29, 2026

April 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Apr 16, 2021
Property Address	21 MARLIN AVE, MILL VALLEY, CA 94941-1373
Document Number	0000025937
Instrument Date	Sep 22, 2020
Instrument	2021-0025937
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	SPRUCE TITLE COMPANY

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	21 MARLIN AVE, MILL VALLEY, CA 94941-1373

April 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Apr 16, 2021
Property Address	21 MARLIN AVE, MILL VALLEY, CA 94941-1373
Document Number	0000025935
Instrument Date	Sep 22, 2020
Instrument	2021-0025935
Transaction Type	Transfer
Record Updated	Aug 13, 2021
Title Company	NOT AVAILABLE, SPRUCE TITLE COMPANY

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	Community Property
Address	21 MARLIN AVE, MILL VALLEY, CA 94941-1373

Mortgage

Document Number	0000025936
Date	Apr 16, 2021
Instrument	2021-0025936

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	174 Months
Due	Oct 1, 2035

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		$1,097,944 (+2%) Land $450,897 Building $647,047
2025	$13,776.00 (+3.61%) Homeowner's exemption	$1,076,418 (+4.04%) Land $442,057 Building $634,361
2023	$13,296.00 (+4.63%) Homeowner's exemption	$1,034,620 Land $424,892 Building $609,728
2022	$12,708.00

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 10 policies
Nearby Flood Policies	10 in force
Nearby Flood Claims	9 (1982–1998)
Claims Outside the SFHA	8 of 9
Most Recent Claim	May 1998 · other causes
Claims by Event	Severe Winter Storms And Flooding, Feb 1998 · 2 claims 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	0.02% annual chance
Exposure	Direct burnable vegetation

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 327 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber	5,000 / 5,000
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20

May also be available: Etheric Networks, T-Mobile.

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