360 Atherton Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 360 Atherton Ave, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	3 bd · 2.5 ba · 2,170 sqft · built 1941
Lot Size	0.672 acres (29,249 sqft)
Owner	2 Individual Names on Record
Last Sale	$4,485,000 (Oct 2020)
Tax Bill	$75,944 (2025)
Deeds & Mortgages	Sep 2020 Transfer Sep 2020 Transfer + 3 more
Flood Zone	Zone X (minimal risk)
APN	`070-031-340`

Property Details

APN / Parcel Number

Primary APN	`070-031-340`

Interior

Bedrooms	3 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	5 Rooms
Stories	2 Stories
Building Area	2,170 sqft Living Area
1st Floor Area	1,540 sqft
2nd Floor Area	630 sqft
Family Room	Family Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1941
Effective Year Built	Effective 1941
Architectural Style	Traditional
Exterior Material	Wood Siding
Roof Material	Wood Shingle
Lot Area	29,249 sqft (0.672 acres)
Lot Dimensions	150 ft deep x 195 ft wide
Garage Area	400 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	360 ATHERTON AVE
City	ATHERTON
State	CA
Zip	94027-6404
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	195 FT X 150 FT ON ATHERTON AVE COM 757.74 FT FR ALAMEDA DE LAS PULGAS PTN OF LOT 57 POLHEMUS TRACT RSM 2/35 TOWN OF ATHERTON
Legal Subdivision	ALAMEDA DE LAS PULGAS
Legal Lot Number	57
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	3
Census Block	3004
Census Tract	611400

Owner

Source: San Mateo County records, as of August 6, 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	1 CALLADO WAY, ATHERTON, CA 94027-6450
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Date	Document
Sep 17, 2020	Affidavit of Death, Transfer LAWYERS TITLE
Sep 17, 2020	Quit Claim Deed, Transfer LAWYERS TITLE
Oct 27, 2020	Grant Deed, Transfer LAWYERS TITLE
Feb 28, 2017	Deed of Trust, Mortgage ROSSI T M JR 1999 TRUST (PT)
Feb 28, 2017	Quit Claim Deed, Transfer Quitclaim

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 27, 2020 · Amount on Record
Deed Sale	Oct 27, 2020 · Amount on Record
Prior Sale	Aug 5, 1996
Deed Document Number	2020118273
Prior Transfer Date	Nov 11, 1994
Prior Transfer Doc	0000187539
Record Updated	Oct 29, 2026

September 2020: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	SAN MATEO CA
Recording Date	Sep 17, 2020
Property Address	360 ATHERTON AVE, ATHERTON, CA 94027-6404
Document Number	0000097009
Instrument Date	Sep 1, 2020
Instrument	97009
Transaction Type	Transfer
Record Updated	Oct 22, 2020
Title Company	LAWYERS TITLE

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	360 ATHERTON AVE ATHERTON CA 940276404, ATHERTON, CA 94027-6404

September 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN MATEO CA
Recording Date	Sep 17, 2020
Property Address	360 ATHERTON AVE, ATHERTON, CA 94027-6404
Document Number	0000097010
Instrument Date	Aug 4, 2020
Instrument	97010
Transaction Type	Transfer
Record Updated	Oct 22, 2020
Title Company	LAWYERS TITLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	360 ATHERTON AVE ATHERTON CA 940276404, ATHERTON, CA 94027-6404

October 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Oct 27, 2020
Property Address	360 ATHERTON AVE, ATHERTON, CA 94027-6404
Document Number	0000118273
Instrument Date	Aug 4, 2020
Instrument	118273
Transaction Type	Transfer
Record Updated	Dec 2, 2020
Title Company	LAWYERS TITLE

Transaction

Amount	Amount Recorded
Tax	$4,934.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	1 CALLADO WAY ATHERTON CA 940276450, ATHERTON, CA 94027-6450

February 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	360 ATHERTON AVE, ATHERTON, CA 94027-6404
Document Number	0000029753
Instrument Date	Feb 28, 2017
Transaction Type	Mortgage
Record Updated	Apr 26, 2017
Title Company	LAWYERS TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	360 ATHERTON AVE ATHERTON CA 940276404, ATHERTON, CA 94027-6404

Mortgage

Document Number	0000029753
Date	Apr 5, 2017
Instrument	29753

Lender

Name	ROSSI T M JR 1999 TRUST (PT)
Address	360 ATHERTON AVE, ATHERTON, CA 94027-6404

Agreement

Amount	Amount Recorded

February 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN MATEO CA
Recording Date	Feb 28, 2017
Property Address	360 ATHERTON AVE, ATHERTON, CA 94027-6404
Document Number	0000017958
Instrument Date	Jul 11, 2016
Instrument	17958
Transaction Type	Transfer
Record Updated	Mar 17, 2017

Transaction

Tax	$0.00
Additional	Quitclaim Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	360 ATHERTON AVE ATHERTON CA 940276404, ATHERTON, CA 94027-6404

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	Las Lomitas 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		$9,613,955 (+41.76%) Land $4,857,955 Building $4,756,000
2025	$75,944.00 (+42.45%)	$6,781,701 (+45.34%) Land $4,762,701 Building $2,019,000
2023	$53,311.00 (+2.81%)	$4,666,194 Land $4,577,760 Building $88,434	$5,374,890
2022	$51,856.00

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
Flood Insurance Cost	Premium on Record median of 10 policies
Nearby Flood Policies	10 in force
Nearby Flood Claims	1 (2022)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Dec 2022 · Severe Winter Storms, 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

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

Wildfire Risk	Low lower than 95% of the US · lower than 97% 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	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 110 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Race Communications Fiber	10,000 / 10,000
AT&T Fiber · Fixed Wireless in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250

May also be available: Cruzio, Etheric Networks, GeoLinks, T-Mobile, Verizon.

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