21 Oak Ave, San Anselmo, CA 94960 Property Records

Marin County property record for 21 Oak Ave, San Anselmo, CA 94960

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,420 sqft · built 1959
Lot Size	0.138 acres (6,000 sqft)
Owner	2 Individual Names on File
Last Sale	$1,390,000 (Oct 2023)
Tax Bill	$19,783 (2025)
Deeds & Mortgages	Oct 2023 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`007-271-31`

Property Details

APN / Parcel Number

Primary APN	`007-271-31`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Building Area	1,420 sqft Living Area
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1959
Effective Year Built	Effective 1959
Architectural Style	Contemporary
Lot Area	6,000 sqft (0.138 acres)
Garage Area	464 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	21 OAK AVE
City	SAN ANSELMO
State	CA
Zip	94960-2720
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1
Jurisdiction	MARIN CA
Township / Civil Division	ROSS VALLEY
Census Block Group	3
Census Block	3011
Census Tract	117000

Owner

21 Oak Ave is owned and occupied by two individuals who bought it in October 2023.

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

Owner of Record	2 Individual Names on File
Mailing Address	21 OAK AVE, SAN ANSELMO, CA 94960-2720
Occupancy	Owner Occupied
Owner Type	Individual

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

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 17, 2023 · Amount on File
Deed Sale	Oct 17, 2023 · Amount on File
Deed Document Number	202327197
Record Updated	Oct 29, 2026

October 2023: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	MARIN CA
Recording Date	Oct 17, 2023
Property Address	21 OAK AVE, SAN ANSELMO, CA 94960-2720
Document Number	0000027197
Instrument Date	Oct 12, 2023
Instrument	2023-0027197
Transaction Type	Transfer
Record Updated	Nov 1, 2023
Title Company	FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY

Transaction

Amount	Amount on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$1,529.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	21 OAK AVE, SAN ANSELMO, CA 94960-2720

Mortgage

Document Number	0000027198
Date	Oct 17, 2023
Instrument	2023-0027198

Lender

Name	THE SARAH W RAYBURN 401K PROFIT SHA
Type	Non-Lending Institution

Agreement

Type	Commercial Mortgage
Amount	Amount on Record

Tax Assessment & Valuation

The 2025 property tax bill for 21 Oak Ave was $19,783.

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

Property Jurisdictions

Type	Name
State	California
County	Marin County
Municipality	San Anselmo Town
Elementary School District	Ross 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		$1,446,156 (+2%) Land $936,360 Building $509,796
2025	$19,783.00	$1,417,800 Land $918,000 Building $499,800
2023	$6,304.00 (+14%) Homeowner's exemption	$328,846 Land $121,870 Building $206,976
2022	$5,530.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 21 Oak Ave in Zone X, an area of minimal flood risk, though there have been 3 flood claims nearby since 1980.

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 File median of 10 individual policies
Community Rating System	Class 8 (10% premium discount)
Nearby Flood Policies	22 units insured incl. 12 condo units
Nearby Flood Claims	3 (1980–2023)
Claims Outside the SFHA	2 of 3
Most Recent Claim	Apr 2023 · Severe Winter Storms, Straight-line Winds, Flooding, Landslides, 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

Wildfire risk around 21 Oak Ave is moderate, ranking above 45% of the US, with a 0.08% annual chance of wildfire.

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

Wildfire Risk	Moderate above 45% of the US · lower than 73% of California
Wildfire Likelihood	0.08% 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 247 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
AT&T DSL · Fiber in parts of the area	100 / 20

May also be available: Unwired.

Cell Coverage

5G (outdoors only) and 4G LTE

Nearby Properties on Oak Ave

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