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186 Atherton Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 186 Atherton Ave, Atherton, CA 94027

Property Summary

Property TypeSingle Family Home
Details6 bd · 5.5 ba · 7,330 sqft · built 1927
Lot Size1 acre (43,563 sqft)
Owner2 Trust Names on File
Last Sale$6,825,000 (Sep 2008)
Tax Bill$100,000 (2025)
Deeds & MortgagesNov 2020 Mortgage
Flood ZoneZone X (minimal risk)
APN070-070-130

Property Details

APN / Parcel Number

Primary APN070-070-130

Interior

Bedrooms6 Beds
Full Baths5.5 Baths
Half Baths1 Half Bath
Total Rooms14 Rooms
Stories2 Stories
Building Area7,330 sqft Living Area
Gross Area8,900 sqft
1st Floor Area2,060 sqft
2nd Floor Area1,270 sqft
Basement Area3,040 sqft
Finished Basement1,470 sqft
Unfinished Basement1,570 sqft
Family RoomFamily Room
StudyStudy
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1927
Effective Year BuiltEffective 1927
Exterior MaterialStucco
Roof MaterialComposition Shingle
Lot Area43,563 sqft
Lot Dimensions425 ft deep x 103 ft wide
Garage Area1,380 sqft
Parking Spaces5 Parking Spaces

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral

Location & Zoning

Street Address186 ATHERTON AVE
CityATHERTON
StateCA
Zip94027-4021
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR1001A
Legal Description1 AC OF LD ON ATHERTON AVE COM 292 FT ELY FR SELBY LANE PTN OF LOT P SELBY TRACT RSM 10/29 30 TOWN OF
Legal SubdivisionSELBY TRACT
Legal Lot NumberP
JurisdictionSAN MATEO CA
Township / Civil DivisionSAN MATEO
Census Block Group4
Census Block4015
Census Tract611400

Owner

186 Atherton Ave is held in a trust since October 2009.

Source: San Mateo County records, as of July 15, 2026

Owner of Record2 Trust Names on File
Mailing Address186 ATHERTON AVE, ATHERTON, CA 94027-4021
Owner TypeCompany
VestingTrust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleSep 26, 2008 · Amount on File
Deed SaleSep 26, 2008 · Amount on File
Prior SaleJun 5, 1998 · Amount on File
Deed Document Number2008108023
Last Transfer DateOct 27, 2009
Transfer Doc0000144665
Record UpdatedOct 29, 2026

November 2020: Deed of Trust, Mortgage

Document TypeDeed of Trust
JurisdictionSAN MATEO CA
Property Address186 ATHERTON AVE, ATHERTON, CA 94027-4021
Transaction TypeMortgage
Record UpdatedFeb 5, 2021
Title CompanyFIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

NameVerified Name

Mortgage

Document Number0000133800
DateNov 24, 2020
Instrument2020-133800
Lender
NameGOLDMAN SACHS BANK USA
TypeBank
AddressNEW YORK, NY 10282
Agreement
TypeConventional Mortgage
AmountAmount on Record
Term361 Months
DueDec 1, 2050
Interest
Rate TypeAdjustable Rate
Rate2.85%
Type Change DateDec 1, 2030
Change FrequencyAnnually
Min Rate At Change2.25%
Max Rate At Change7.85%
Index1-Year LIBOR
Max Rate7.85%

Tax Assessment & Valuation

The 2025 property tax bill for 186 Atherton Ave was $100,000.

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

Property Jurisdictions

TypeName
StateCalifornia
MunicipalityAtherton Town
CountySan Mateo County
Elementary School DistrictRedwood City Elementary School District (KG - 08)
Secondary School DistrictSequoia Union High School District (09 - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$9,199,789 (+2.25%) Land $7,881,123 Building $1,318,666
2025$100,000.00$8,997,384 Land $7,726,592 Building $1,270,792
2023$95,395.00 (+4.93%)$8,477,881 Land $7,426,560 Building $1,051,321$6,831,720
2022$90,916.00

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

Flood

FEMA maps place 186 Atherton Ave in Zone X, an area of minimal flood risk, though there have been 8 flood claims nearby since 1979.

Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies7 in force
Nearby Flood Claims8 (1979–2019)
Claims Outside the SFHA2 of 8
Most Recent ClaimJan 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

Wildfire risk around 186 Atherton Ave is low, with less than a 0.01% annual chance of wildfire.

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

Wildfire RiskLow
lower than 95% of the US · lower than 97% of California
Wildfire LikelihoodUnder 0.01% annual chance
ExposureNone
beyond ember reach

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 SystemCALIFORNIA WATER SERVICE - BEAR GULCH
private · serves 60,382 people · EPA ID CA4110006
Water SourceSurface water
Last State InspectionFeb 2025
Lead4 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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

ProviderMax 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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