166 Encinal Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 166 Encinal Ave, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	5 bd · 4 ba · 5,534 sqft · built 1942
Lot Size	0.932 acres (40,606 sqft)
Owner	2 Company Names on Record
Last Sale	$7,050,000 (Feb 2020)
Tax Bill	$87,170 (2025)
Deeds & Mortgages	Dec 2022 Transfer Feb 2020 Sale
Flood Zone	Zone X (minimal risk)
APN	`061-350-310`

Property Details

APN / Parcel Number

Primary APN	`061-350-310`

Interior

Bedrooms	5 Beds
Full Baths	4 Baths
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	5,534 sqft Living Area
Gross Area	6,774 sqft
1st Floor Area	3,160 sqft
2nd Floor Area	890 sqft
Basement Area	1,240 sqft
Family Room	Family Room
Study	Study

Exterior

Year Built	Built 1942
Effective Year Built	Effective 1942
Lot Area	40,606 sqft (0.932 acres)
Garage Area	1,000 sqft
Parking Spaces	4 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	166 ENCINAL AVE
City	ATHERTON
State	CA
Zip	94027-3103
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10000
Legal Description	PARCEL 4 PARCEL MAP VOL 49/61
Legal Subdivision	LARSON ESTATES
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	1
Census Block	1006
Census Tract	611500

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	166 ENCINAL AVE, ATHERTON, CA 94027-3103
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Dec 21, 2022	Intrafamily Transfer, Transfer
Feb 12, 2020	Grant Deed, Transfer NORTH AMERICAN TITLE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Feb 12, 2020 · Amount on Record
Deed Sale	Feb 12, 2020 · Amount on Record
Prior Sale	Oct 2, 2003 · Amount on Record
Deed Document Number	202012027
Prior Transfer Date	Dec 19, 2011
Prior Transfer Doc	0000161862
Record Updated	Oct 29, 2026

December 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Dec 21, 2022
Property Address	166 ENCINAL AVE, ATHERTON, CA 94027-3103
Document Number	0000087016
Map Reference	VOL 49 PG 61
Instrument Date	Dec 12, 2022
Instrument	2022-087016
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
Address	166 ENCINAL AVE, ATHERTON, CA 94027-3103

February 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Feb 12, 2020
Property Address	166 ENCINAL AVE, ATHERTON, CA 94027-3103
Document Number	0000012027
Instrument Date	Feb 6, 2020
Instrument	12027
Transaction Type	Transfer
Record Updated	Mar 10, 2020
Title Company	NORTH AMERICAN TITLE

Transaction

Amount	Amount Recorded
Tax	$7,755.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	166 ENCINAL AVE ATHERTON CA 940273103, ATHERTON, CA 94027-3103

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	Menlo Park 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		$7,864,405 (+2%) Land $5,577,593 Building $2,286,812
2025	$87,170.00 (+4.81%)	$7,710,202 (+4.04%) Land $5,468,229 Building $2,241,973
2023	$83,166.00 (+2.42%)	$7,410,807 Land $5,255,892 Building $2,154,915	$8,011,440
2022	$81,200.00

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	4 in force

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 296 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, DSL in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20

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

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