123 William Ave, Larkspur, CA 94939 Property Records

Marin County property record for 123 William Ave, Larkspur, CA 94939

Property Summary

Property Type	Single Family Home
Details	1 bd · 1 ba · 688 sqft · built 1908
Lot Size	0.072 acres (3,150 sqft)
Owner	2 Company Names on Record
Last Sale	$720,000 (Sep 2017)
Tax Bill	$13,189 (2025)
Deeds & Mortgages	Aug 2022 Transfer Aug 2022 Transfer + 4 more
Flood Zone	Zone X (moderate risk)
APN	`021-115-02`

Property Details

APN / Parcel Number

Primary APN	`021-115-02`

Interior

Bedrooms	1 Bed
Full Baths	1 Bath
Building Area	688 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1908
Effective Year Built	Effective 1927
Architectural Style	Contemporary
Lot Area	3,150 sqft (0.072 acres)
Deck Area	102 sqft
Patio Area	102 sqft

Location & Zoning

Street Address	123 WILLIAM AVE
City	LARKSPUR
State	CA
Zip	94939-2051
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	MAP F6 586
Legal Subdivision	BALTIMORE PARK 01
Legal Tract	1
Legal Block	F
Legal Lot Number	3,4
Jurisdiction	MARIN CA
Township / Civil Division	ROSS VALLEY
Census Block Group	2
Census Block	2001
Census Tract	120002

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic District	Within the Larkspur Downtown Historic District listed 1982 · 42 contributing resources · NRIS 82000972

Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.

Owner

Source: Marin County records, as of August 27, 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 Company Names on Record
Mailing Address	1579 26TH AVE, SAN FRANCISCO, CA 94122-3217
Owner Type	Company
Vesting	Borrower in Default

Deeds, Mortgages & Sale History

Date	Document
Aug 9, 2022	Intrafamily Transfer, Transfer
Aug 9, 2022	Intrafamily Transfer, Transfer
Feb 13, 2018	Deed of Trust, Mortgage · Line of Credit US BANK NA
Feb 13, 2018	Deed of Trust, Mortgage · Conventional Mortgage WESTCOAST MORTGAGE GROUP & REALTY CO
Jul 10, 2020	Deed of Trust, Mortgage · Conventional Mortgage WESTCOAST MORTGAGE GROUP & REALTY CO
Sep 18, 2017	Grant Deed, Transfer PRESDIO MORTGAGE HOLDINGS LP

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 18, 2017 · Amount on Record
Deed Sale	Sep 18, 2017 · Amount on Record
Deed Document Number	201737269
Last Transfer Date	Aug 2, 2022
Transfer Doc	0000029006
Record Updated	Oct 29, 2026

August 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Aug 9, 2022
Property Address	123 WILLIAM AVE, LARKSPUR, CA 94939-2051
Document Number	0000029006
Instrument Date	Aug 2, 2022
Instrument	2022-0029006
Transaction Type	Transfer
Record Updated	Oct 12, 2022

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 with Right of Survivorship
Address	1579 26TH AVE, SAN FRANCISCO, CA 94122-3217

August 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	MARIN CA
Recording Date	Aug 9, 2022
Property Address	123 WILLIAM AVE, LARKSPUR, CA 94939-2051
Document Number	0000029007
Instrument Date	Aug 2, 2022
Instrument	2022-0029007
Transaction Type	Transfer
Record Updated	Jun 7, 2023

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	1579 26TH AVE, SAN FRANCISCO, CA 94122-3217

February 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	123 WILLIAM AVE, LARKSPUR, CA 94939-2051
Transaction Type	Mortgage
Record Updated	Feb 7, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000004513
Date	Feb 13, 2018
Instrument	2018-0004513

Lender

Name	US BANK NA
Type	Bank
Address	OSHKOSH, WI 54902

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	367 Months
Due	Sep 25, 2048

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

February 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	123 WILLIAM AVE, LARKSPUR, CA 94939-2051
Transaction Type	Mortgage
Record Updated	Feb 7, 2021
Title Company	FIRST AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000004512
Date	Feb 13, 2018
Instrument	2018-0004512

Lender

Name	WESTCOAST MORTGAGE GROUP & REALTY CO
Type	Mortgage Company
Address	SACRAMENTO, CA 95818

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Mar 1, 2048

July 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	MARIN CA
Property Address	123 WILLIAM AVE, LARKSPUR, CA 94939-2051
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	FIRST AMERICAN TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000029565
Date	Jul 10, 2020
Instrument	2020-0029565

Lender

Name	WESTCOAST MORTGAGE GROUP & REALTY CO
Type	Mortgage Company
Address	SACRAMENTO, CA 95818

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Aug 1, 2050

September 2017: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Sep 18, 2017
Property Address	123 WILLIAM AVE, LARKSPUR, CA 94939-2051
Document Number	0000037269
Instrument Date	Sep 14, 2017
Instrument	2017-0037269
Transaction Type	Transfer
Record Updated	Aug 13, 2021
Title Company	FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	1579 26TH AVE, SAN FRANCISCO, CA 94122-3217

Mortgage

Document Number	0000037270
Date	Sep 18, 2017
Instrument	2017-0037270

Lender

Name	PRESDIO MORTGAGE HOLDINGS LP
Type	Non-Lending Institution

Agreement

Amount	Amount Recorded

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		$835,602 (+2%) Land $821,676 Building $13,926
2025	$13,189.00 (+5.98%)	$819,222 (+4.04%) Land $805,569 Building $13,653
2023	$12,445.00 (+1.69%)	$787,413 Land $774,290 Building $13,123
2022	$12,238.00

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 moderate risk
500-Year Floodplain	Yes 0.2% annual chance
Nearest Special Flood Hazard Area	Zone A, within 100 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 20 policies
Nearby Flood Policies	20 in force
Nearby Flood Claims	2 (2017–2023)
Claims Outside the SFHA	2 of 2
Most Recent Claim	Mar 2023 · Severe Storm And Flooding

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 66% of the US · lower than 80% 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 448 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250

May also be available: T-Mobile, Unwired.

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