424 William Ave, Larkspur, CA 94939 Property Records

Marin County property record for 424 William Ave, Larkspur, CA 94939

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,542 sqft · built 1941
Lot Size	0.133 acres (5,775 sqft)
Owner	2 Company Names on Record
Last Sale	$525,000 (Feb 2000)
Tax Bill	$14,756 (2025)
Deeds & Mortgages	Aug 2019 Transfer Aug 2019 Transfer + 1 more
Flood Zone	Zone AE (high risk)
APN	`021-212-20`

Property Details

APN / Parcel Number

Primary APN	`021-212-20`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Building Area	1,542 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1941
Effective Year Built	Effective 1980
Architectural Style	Contemporary
Lot Area	5,775 sqft (0.133 acres)
Garage Area	288 sqft
Parking Spaces	1 Parking Space
Deck Area	330 sqft
Patio Area	330 sqft

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	424 WILLIAM AVE
City	LARKSPUR
State	CA
Zip	94939-1530
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	L85 /B5P93 M HEATHER GARDENS #2
Legal Subdivision	HEATHER GARDENS
Legal Tract	2
Jurisdiction	MARIN CA
Township / Civil Division	ROSS VALLEY
Census Block Group	1
Census Block	1005
Census Tract	120002

Owner

Source: Marin County records, as of August 27, 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	424 WILLIAM AVE, LARKSPUR, CA 94939-1530
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust, Family Trust

Deeds, Mortgages & Sale History

Date	Document
Aug 14, 2019	Quit Claim Deed, Transfer NOT AVAILABLE
Aug 14, 2019	Quit Claim Deed, Transfer NOT AVAILABLE
Dec 29, 2017	Grant Deed, Transfer · Line of Credit MUFG UNION BANK NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Feb 16, 2000 · Amount on Record
Deed Sale	Feb 16, 2000 · Amount on Record
Deed Document Number	20008257
Last Transfer Date	Aug 14, 2019
Transfer Doc	0000028958
Record Updated	Oct 29, 2026

August 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	MARIN CA
Recording Date	Aug 14, 2019
Property Address	424 WILLIAM AVE, LARKSPUR, CA 94939-1530
Document Number	0000028959
Instrument Date	Aug 14, 2019
Instrument	28959
Transaction Type	Transfer
Record Updated	Aug 23, 2019
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer Partial Interest

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Tenants in Common
Address	424 WILLIAM AVE LARKSPUR CA 949391530, LARKSPUR, CA 94939-1530

August 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	MARIN CA
Recording Date	Aug 14, 2019
Property Address	424 WILLIAM AVE, LARKSPUR, CA 94939-1530
Document Number	0000028958
Instrument Date	Aug 14, 2019
Instrument	28958
Transaction Type	Transfer
Record Updated	Aug 23, 2019
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	424 WILLIAM AVE LARKSPUR CA 949391530, LARKSPUR, CA 94939-1530

December 2017: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Dec 29, 2017
Property Address	424 WILLIAM AVE, LARKSPUR, CA 94939-1530
Document Number	0000051888
Map Reference	VOL5 PG93
Instrument Date	Dec 1, 2017
Instrument	2017-0051888
Transaction Type	Transfer
Record Updated	Aug 13, 2021
Title Company	FIRST AMERICAN TITLE CO

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	424 WILLIAM AVE, LARKSPUR, CA 94939-1530

Mortgage

Document Number	0000051889
Date	Dec 29, 2017
Instrument	2017-0051889

Lender

Name	MUFG UNION BANK NA
Type	Bank

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
County	Marin County
Municipality	Larkspur City
Elementary School District	Larkspur 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		$976,681 (+2%) Land $548,663 Building $428,018
2025	$14,756.00 (+5.94%) Homeowner's exemption	$957,536 (+4.04%) Land $537,908 Building $419,628
2023	$13,929.00 (+1.6%) Homeowner's exemption	$920,358 Land $517,023 Building $403,335
2022	$13,710.00

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 AE high risk
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	10.0 ft
Flood Insurance Requirement	Required federally backed loans
Flood Insurance Cost	Premium on Record median of 23 policies
Nearby Flood Policies	23 in force
Nearby Flood Claims	2 (2014–2017)
Most Recent Claim	Jan 2017 · Severe Winter Storms, Flooding, And Mudslides

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	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 416 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
T-Mobile Fixed Wireless	100 / 20
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: Verizon.

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