66 Atherton Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 66 Atherton Ave, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	5 bd · 7.5 ba · 7,480 sqft · built 1948
Lot Size	1.91 acres (83,407 sqft)
Owner	2 Company Names on Record
Last Sale	$3,332,000 (Nov 2014)
Tax Bill	$96,300 (2025)
Deeds & Mortgages	Aug 2021 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`070-110-100`

Property Details

APN / Parcel Number

Primary APN	`070-110-100`

Interior

Bedrooms	5 Beds
Full Baths	7.5 Baths
Half Baths	1 Half Bath
Total Rooms	15 Rooms
Stories	1 Story
Building Area	7,480 sqft Living Area
1st Floor Area	6,180 sqft
2nd Floor Area	1,300 sqft
Family Room	Family Room
Study	Study
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1948
Effective Year Built	Effective 1948
Architectural Style	Ranch
Exterior Material	Wood Siding
Roof Material	Wood Shingle
Lot Area	83,407 sqft
Lot Dimensions	425 ft deep x 196 ft wide
Garage Area	1,570 sqft
Parking Spaces	6 Parking Spaces

Utilities, Heating & Cooling

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

Location & Zoning

Street Address	66 ATHERTON AVE
City	ATHERTON
State	CA
Zip	94027-4019
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	1.92 AC OF LD ON ATHERTON AV COM 768.75 FT ELY FR AUSTIN AVEPTN OF LOT D SELBY TRACT RSM 10/29 30 TOWN OF ATHERTON
Legal Subdivision	SELBY TRACT
Legal Lot Number	D
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	4
Census Block	4014
Census Tract	611400

Owner

Source: San Mateo County records, as of July 15, 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	66 ATHERTON AVE, ATHERTON, CA 94027-4019
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Nov 24, 2014 · Amount on Record
Deed Sale	Nov 24, 2014 · Amount on Record
Deed Document Number	2014108272
Prior Transfer Date	Oct 11, 2014
Prior Transfer Doc	0000108272
Record Updated	Sep 20, 2026

August 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	66 ATHERTON AVE, ATHERTON, CA 94027-4019
Transaction Type	Mortgage
Record Updated	Aug 31, 2021
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	66 ATHERTON AVE, ATHERTON, CA 94027-4019

Mortgage

Document Number	0000116340
Date	Aug 9, 2021
Instrument	2021-116340

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	351 Months
Due	Nov 1, 2050

Interest

Rate Type	Adjustable Rate
Rate	2.55%
Type Change Date	Nov 1, 2030
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	7.55%
Index	1-Year LIBOR
Max Rate	7.55%

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		$8,839,498 (+2%) Land $6,287,978 Building $2,551,520
2025	$96,300.00 (+2.8%) Homeowner's exemption	$8,666,176 (+4.04%) Land $6,164,685 Building $2,501,491
2023	$93,674.00 (+4.93%) Homeowner's exemption	$8,329,661 Land $5,925,304 Building $2,404,357	$7,786,350
2022	$89,276.00

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 94% of the US · lower than 96% of California
Wildfire Likelihood	0.02% 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 283 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Race Communications Fiber	10,000 / 10,000
Xfinity Cable	2,000 / 250
AT&T Fixed Wireless · DSL · Fiber in parts of the area	100 / 20

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

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