418 William Ave, Larkspur, CA 94939 Property Records

Marin County property record for 418 William Ave, Larkspur, CA 94939

Property Summary

Property Type	Single Family Home
Details	5 bd · 3.5 ba · 2,380 sqft · built 1942
Lot Size	0.128 acres (5,575 sqft)
Owner	2 Individual Names on Record
Last Sale	$3,375,000 (Jun 2023)
Tax Bill	$43,486 (2025)
Deeds & Mortgages	Jun 2023 Sale & Mortgage Aug 2018 Transfer + 2 more
Flood Zone	Zone X (moderate risk)
APN	`021-212-22`

Property Details

APN / Parcel Number

Primary APN	`021-212-22`

Interior

Bedrooms	5 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Building Area	2,380 sqft Living Area
Basement Area	109 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1942
Effective Year Built	Effective 1995
Architectural Style	Contemporary
Lot Area	5,575 sqft (0.128 acres)
Garage Area	264 sqft
Deck Area	540 sqft

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	418 WILLIAM AVE
City	LARKSPUR
State	CA
Zip	94939-1530
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	MAP 5 PG 93 LOT 83
Legal Subdivision	HEATHER GARDENS 02
Legal Tract	2
Legal Lot Number	83
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 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 Individual Names on Record
Mailing Address	418 WILLIAM AVE, LARKSPUR, CA 94939-1530
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Date	Document
Jun 14, 2023	Grant Deed, Transfer · Conventional Mortgage ORIGINPOINT LLC
Aug 17, 2018	Quit Claim Deed, Transfer STEWART TITLE
Aug 17, 2018	Grant Deed, Transfer STEWART TITLE
Jun 15, 2017	Quit Claim Deed, Transfer Quitclaim

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 14, 2023 · Amount on Record
Deed Sale	Jun 14, 2023 · Amount on Record
Prior Sale	Aug 17, 2018 · Amount on Record
Deed Document Number	202314989
Prior Transfer Date	Aug 15, 2018
Prior Transfer Doc	0000029250
Record Updated	Oct 29, 2026

June 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Jun 14, 2023
Property Address	418 WILLIAM AVE, LARKSPUR, CA 94939-1530
Document Number	0000014989
Map Reference	VOL 5 PG 93
Instrument Date	Jun 9, 2023
Instrument	2023-0014989
Transaction Type	Transfer
Record Updated	Jun 29, 2023
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$3,712.50
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	418 WILLIAM AVE, LARKSPUR, CA 94939-1530

Mortgage

Document Number	0000014990
Date	Jun 14, 2023
Instrument	2023-0014990

Lender

Name	ORIGINPOINT LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jul 1, 2053

August 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	MARIN CA
Recording Date	Aug 17, 2018
Property Address	418 WILLIAM AVE, LARKSPUR, CA 94939-1530
Document Number	0000029250
Instrument Date	Aug 15, 2018
Instrument	29250
Transaction Type	Transfer
Record Updated	Aug 29, 2018
Title Company	STEWART TITLE

Transaction

Tax	$0.00
Additional	Quitclaim Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	PO BOX 7338 BERKELEY CA 947070338, BERKELEY, CA 94707-0338

August 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Aug 17, 2018
Property Address	418 WILLIAM AVE, LARKSPUR, CA 94939-1530
Document Number	0000029249
Instrument Date	Aug 14, 2018
Instrument	29249
Transaction Type	Transfer
Record Updated	Sep 4, 2018
Title Company	STEWART TITLE

Transaction

Amount	Amount Recorded
Tax	$2,690.05
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	PO BOX 7338 BERKELEY CA 947070338, BERKELEY, CA 94707-0338

June 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	MARIN CA
Recording Date	Jun 15, 2017
Property Address	418 WILLIAM AVE, LARKSPUR, CA 94939-1530
Document Number	0000024044
Instrument Date	Jun 15, 2017
Instrument	24044
Transaction Type	Transfer
Record Updated	Jun 22, 2017

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	42 JUNIPERO SERRA AVE SAN RAFAEL CA 949012320, SAN RAFAEL, CA 94901-2320

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		$3,581,550 (+2%) Land $2,148,930 Building $1,432,620
2025	$43,486.00 (+32.18%) Homeowner's exemption	$3,511,350 (+34.03%) Land $2,106,810 Building $1,404,540
2023	$32,899.00 (+0.99%)	$2,619,772 (+2%) Land $1,601,192 Building $1,018,580
2022	$32,577.00	$2,568,412 Land $1,569,801 Building $998,611

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 moderate risk
500-Year Floodplain	Yes 0.2% annual chance
Nearest Special Flood Hazard Area	Zone AE, within 100 ft
Flood Insurance Requirement	Not required lenders may require it
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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