23 Austin Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 23 Austin Ave, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	5 bd · 5 ba · 3,750 sqft · built 1937
Lot Size	0.936 acres (40,771 sqft)
Owner	2 Company Names on Record
Last Sale	$7,600,000 (Oct 2024)
Tax Bill	$84,407 (2025)
Deeds & Mortgages	Oct 2021 Mortgage Oct 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`059-302-360`

Property Details

APN / Parcel Number

Primary APN	`059-302-360`

Interior

Bedrooms	5 Beds
Full Baths	5 Baths
Total Rooms	10 Rooms
Stories	2 Stories
Building Area	3,750 sqft Living Area
1st Floor Area	2,230 sqft
2nd Floor Area	1,340 sqft
Family Room	Family Room
Study	Study
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1937
Effective Year Built	Effective 1937
Architectural Style	Colonial
Exterior Material	Stucco
Construction Type	Wood
Roof Material	Wood Shingle
Lot Area	40,771 sqft (0.936 acres)
Lot Dimensions	292 ft deep x 163 ft wide
Garage Area	596 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	23 AUSTIN AVE
City	ATHERTON
State	CA
Zip	94027-3905
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	LOT 8 BLOCK 6 ATHERTON OAKS RSM 16/10 11 TOWN OF ATHERTON
Legal Subdivision	ATHERTON OAKS
Legal Tract	A
Legal Block	6
Legal Lot Number	8
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	4
Census Block	4001
Census Tract	611400

Owner

Source: San Mateo County records, as of July 15, 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	500 N CENTRAL AVE, 930, GLENDALE, CA 91203-3341
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Oct 26, 2021	Intrafamily Transfer, Transfer · Conventional Mortgage HOME POINT FINANCIAL CORPORATION
Oct 26, 2021	Intrafamily Transfer, Transfer ACCOMMODATION

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 21, 2024 · Amount on Record
Deed Sale	Oct 21, 2024 · Amount on Record
Prior Sale	Jul 15, 2003 · Amount on Record
Deed Document Number	202455392
Prior Transfer Date	Oct 1, 2021
Prior Transfer Doc	0000150485
Record Updated	Sep 20, 2026

October 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Oct 26, 2021
Property Address	23 AUSTIN AVE, ATHERTON, CA 94027-3905
Document Number	0000150483
Map Reference	MB 16 PG 10&11
Instrument Date	Oct 1, 2021
Instrument	2021-150483
Transaction Type	Transfer
Record Updated	Nov 22, 2021
Title Company	STEWART TITLE GUARANTY CO

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	Joint Tenants
Address	23 AUSTIN AVE, ATHERTON, CA 94027-3905

Mortgage

Document Number	0000150484
Date	Oct 26, 2021
Instrument	2021-150484

Lender

Name	HOME POINT FINANCIAL CORPORATION
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 1, 2051

October 2021: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Oct 26, 2021
Property Address	23 AUSTIN AVE, ATHERTON, CA 94027-3905
Document Number	0000150485
Map Reference	MB 16 PG 10&11
Instrument Date	Oct 1, 2021
Instrument	2021-150485
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	ACCOMMODATION

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
Address	23 AUSTIN AVE, ATHERTON, CA 94027-3905

Tax Assessment & Valuation

Source: San Mateo County assessment roll, as of July 15, 2026

Property Jurisdictions

Type	Name
State	California
Municipality	Atherton Town
County	San Mateo County
Elementary School District	Redwood City Elementary School District (KG - 08)
Secondary School District	Sequoia Union High School District (09 - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$7,752,000 (+2%) Land $7,344,000 Building $408,000
2025	$84,407.00 (+70.96%)	$7,600,000 (+74.49%) Land $7,200,000 Building $400,000
2023	$49,373.00 (+4.94%) Homeowner's exemption	$4,355,465 Land $2,169,450 Building $2,186,015	$7,412,490
2022	$47,048.00

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · 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
Nearby Flood Policies	7 in force
Nearby Flood Claims	8 (1979–2019)
Claims Outside the SFHA	2 of 8
Most Recent Claim	Jan 2019 · other causes

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 99.1% of the US · lower than 99.2% of California
Wildfire Likelihood	Under 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	CALIFORNIA WATER SERVICE - BEAR GULCH private · serves 60,382 people · EPA ID CA4110006
Water Source	Surface water
Last State Inspection	Feb 2025
Lead	4 ppb (2022–2024) 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 662 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Astound Broadband Cable	1,500 / 50
Etheric Networks Fixed Wireless	250 / 100

May also be available: Race Communications, Sonic Telecom, T-Mobile, Verizon.

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