21 Heron Dr, Mill Valley, CA 94941 Property Records

Marin County property record for 21 Heron Dr, Mill Valley, CA 94941

Property Summary

Property Type	Single Family Home
Details	4 bd · 4 ba · 4,025 sqft · built 1990
Lot Size	0.31 acres (13,504 sqft)
Owner	2 Individual Names on File
Last Sale	$3,010,000 (Apr 2014)
Tax Bill	$45,089 (2025)
Deeds & Mortgages	Jul 2018 Line of Credit Aug 2020 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`043-370-10`

Property Details

APN / Parcel Number

Primary APN	`043-370-10`

Interior

Bedrooms	4 Beds
Full Baths	4 Baths
Total Rooms	9 Rooms
Stories	3 Stories
Building Area	4,025 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1990
Effective Year Built	Effective 1991
Architectural Style	Contemporary
Exterior Material	Stucco
Roof Material	Tile
Lot Area	13,504 sqft (0.31 acres)
Garage Area	645 sqft
Parking Spaces	2 Parking Spaces
Deck Area	1,397 sqft
Patio Area	1,397 sqft

Utilities, Heating & Cooling

Heating System	Central
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	21 HERON DR
City	MILL VALLEY
State	CA
Zip	94941-3264
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	BFCRMP4
Legal Description	MAP 20 PG 16 LOT 53
Legal Subdivision	STRAWBERRY POINT
Legal Lot Number	53
Jurisdiction	MARIN CA
Township / Civil Division	SOUTHEAST MARIN
Census Block Group	1
Census Block	1002
Census Tract	125000

Owner

21 Heron Dr is owned and occupied by two individuals who acquired it in August 2016.

Source: Marin County records, as of July 13, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	2 Individual Names on File
Mailing Address	21 HERON DR, MILL VALLEY, CA 94941-3264
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Right of Survivorship

Deeds, Mortgages & Sale History

Date	Document
Jul 16, 2018	Deed of Trust, Mortgage · Line of Credit WELLS FARGO BANK NA
Aug 31, 2020	Deed of Trust, Mortgage · Conventional Mortgage WELLS FARGO BANK NA
Aug 25, 2020	Loan Modification, Mortgage · Line of Credit WELLS FARGO BK

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Apr 15, 2014 · Amount on File
Deed Sale	Apr 15, 2014 · Amount on File
Prior Sale	Mar 24, 2006 · Amount on File
Deed Document Number	201414202
Last Transfer Date	Aug 16, 2016
Transfer Doc	0000039210
Record Updated	Oct 29, 2026

July 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	21 HERON DR, MILL VALLEY, CA 94941-3264
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000025227
Date	Jul 16, 2018
Instrument	2018-0025227

Lender

Name	WELLS FARGO BANK NA
Type	Bank
Address	SIOUX FALLS, SD 57104

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Jul 27, 2048

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	21 HERON DR, MILL VALLEY, CA 94941-3264
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	FIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	21 HERON DR, MILL VALLEY, CA 94941-3264

Mortgage

Document Number	0000039979
Date	Aug 31, 2020
Instrument	2020-0039979

Lender

Name	WELLS FARGO BANK NA
Type	Bank
Address	SIOUX FALLS, SD 57104

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Sep 1, 2050

August 2020: Loan Modification, Mortgage

Document Type	Loan Modification
Jurisdiction	MARIN CA
Property Address	21 HERON DR, MILL VALLEY, CA 94941-3264
Document Number	0000039981
Instrument Date	Aug 25, 2020
Transaction Type	Mortgage
Record Updated	Sep 18, 2020
Title Company	FIRST AMERICAN TITLE, FIRST AMERICAN TITLE/MARIN

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	21 HERON DR MILL VALLEY CA 949413264, MILL VALLEY, CA 94941-3264

Mortgage

Document Number	0000039981
Date	Aug 31, 2020
Instrument	39981

Lender

Name	WELLS FARGO BK
Type	Bank
Address	PORTLAND, OR 97208-4149

Agreement

Type	Line of Credit
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

The 2025 property tax bill for 21 Heron Dr was $45,089 with a homeowner's exemption.

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

Property Jurisdictions

Type	Name
State	California
County	Marin County
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		$3,759,712 (+2%) Land $2,250,576 Building $1,509,136
2025	$45,089.00 Homeowner's exemption	$3,686,010 Land $2,206,458 Building $1,479,552
2023	$42,851.00 (+3.63%) Homeowner's exemption	$3,542,907 Land $2,120,796 Building $1,422,111
2022	$41,351.00

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

Flood

FEMA maps place 21 Heron Dr in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

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
Nearest Special Flood Hazard Area	Zone VE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on File median of 29 individual policies
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	81 units insured incl. 52 condo units
Nearby Flood Claims	24 (1978–2014)
Claims Outside the SFHA	2 of 24
Most Recent Claim	Dec 2014 · rainfall accumulation
Claims by Event	Severe Winter Storms And Flooding, Mar 1998 · 3 claims Coastal Storms, Floods, Slides & Tornadoes, Feb 1983 · 4 claims Severe Storms, Flood, Mudslides & High Tide, Jan 1982 · 2 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

Wildfire risk around 21 Heron Dr is low, with less than a 0.01% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 99.1% of the US · lower than 99.2% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond 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 185 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
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100

May also be available: T-Mobile.

Cell Coverage

5G (outdoors only) and 4G LTE

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