9 Betty Ln, Atherton, CA 94027 Property Records

San Mateo County property record for 9 Betty Ln, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	5 bd · 4 ba · 4,280 sqft · built 1966
Lot Size	1.37 acres (59,900 sqft)
Owner	2 Company Names on Record
Last Sale	$9,025,000 (Oct 2021)
Tax Bill	$104,769 (2025)
Deeds & Mortgages	Oct 2021 Sale & Mortgage Dec 2017 Line of Credit
Flood Zone	Zone X (minimal risk)
APN	`070-022-720`

Property Details

APN / Parcel Number

Primary APN	`070-022-720`

Interior

Bedrooms	5 Beds
Full Baths	4 Baths
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	4,280 sqft Living Area
1st Floor Area	3,320 sqft
Family Room	Family Room
Fireplaces	2 Fireplaces
Fireplace	Fireplace

Exterior

Year Built	Built 1966
Effective Year Built	Effective 1966
Architectural Style	Ranch
Exterior Material	Stucco
Roof Material	Wood Shingle
Lot Area	59,900 sqft
Lot Dimensions	187 ft deep x 330 ft wide
Garage Area	740 sqft

Utilities, Heating & Cooling

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

Location & Zoning

Street Address	9 BETTY LN
City	ATHERTON
State	CA
Zip	94027-5401
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	1.38 AC MOL HAV 21.89 FT FRONT ON BETTY LN BEING NLY PTN OF LOT 21 & SELY PTN OF LOT 22 POLHEMUS TRACT RSM 2/35
Legal Subdivision	POLHEMUS TRACT
Legal Lot Number	21,22
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	3
Census Block	3000
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 Company Names on Record
Mailing Address	83 SANTIAGO AVE, ATHERTON, CA 94027-5412
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Oct 29, 2021	Grant Deed, Transfer · Commercial Mortgage CLAYTON DEL SECCO
Dec 19, 2017	Intrafamily Transfer, Transfer · Line of Credit FIRST REPUBLIC BANK

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Oct 29, 2021 · Amount on Record
Deed Sale	Oct 29, 2021 · Amount on Record
Deed Document Number	2021152141
Prior Transfer Date	Dec 11, 2017
Prior Transfer Doc	0000113876
Record Updated	Oct 29, 2026

October 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Oct 29, 2021
Property Address	9 BETTY LN, ATHERTON, CA 94027-5401
Document Number	0000152141
Map Reference	MB 2 PG 35
Instrument Date	Oct 21, 2021
Instrument	2021-152141
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	LAWYERS TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$9,927.50
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	83 SANTIAGO AVE, ATHERTON, CA 94027-5412

Mortgage

Document Number	0000152142
Date	Oct 29, 2021
Instrument	2021-152142

Lender

Name	CLAYTON DEL SECCO
Type	Private Party

Agreement

Type	Commercial Mortgage
Amount	Amount Recorded

December 2017: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Dec 19, 2017
Property Address	9 BETTY LN, ATHERTON, CA 94027-5401
Document Number	0000113876
Map Reference	MB6 PG61
Instrument Date	Dec 11, 2017
Instrument	2017-113876
Transaction Type	Transfer
Record Updated	Aug 9, 2021
Title Company	LAWYERS TITLE CO

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name
Address	CA 00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Family Trust
Address	9 BETTY LN, ATHERTON, CA 94027-5401

Mortgage

Document Number	0000113877
Date	Dec 19, 2017
Instrument	2017-113877

Lender

Name	FIRST REPUBLIC BANK
Type	Bank

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	300 Months
Due	Dec 26, 2042

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

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
2026		$9,741,889 (+2%) Land $9,741,889
2025	$104,769.00 (+1.41%)	$9,550,872 (+3.75%) Land $9,550,872
2023	$103,315.00 (+2.85%)	$9,205,500 Land $9,180,000 Building $25,500
2022	$100,455.00

Assessed value is set for property tax purposes and is not a market price estimate.

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 160 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: Etheric Networks, Verizon.

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