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40 de Bell Dr, Atherton, CA 94027 Property Records

San Mateo County property record for 40 de Bell Dr, Atherton, CA 94027

Property Summary

Property TypeSingle Family Home
Details5 bd · 5.5 ba · 4,629 sqft · built 2022
Lot Size0.768 acres (33,466 sqft)
Owner2 Individual Names on Record
Last Sale$4,350,000 (Apr 2017)
Tax Bill$113,220 (2025)
Deeds & MortgagesApr 2017 Sale & Mortgage
Flood ZoneZone X (minimal risk)
APN061-272-030

Property Details

APN / Parcel Number

Primary APN061-272-030

Interior

Bedrooms5 Beds
Full Baths5.5 Baths
Half Baths1 Half Bath
Total Rooms12 Rooms
Stories2 Stories
Building Area4,629 sqft Living Area
Gross Area7,120 sqft
1st Floor Area2,395 sqft
2nd Floor Area2,234 sqft
Basement Area2,491 sqft
Family RoomFamily Room
StudyStudy
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 2022
Effective Year BuiltEffective 2022
Architectural StyleRanch
Exterior MaterialStucco
Construction TypeFrame
Roof MaterialWood Shingle
Lot Area33,466 sqft (0.768 acres)
View / LotCorner
Garage Area661 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral
SewerMunicipal
Water SourceCommercial

Location & Zoning

Street Address40 DE BELL DR
CityATHERTON
StateCA
Zip94027-2210
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR1001A
Legal DescriptionNW 3/4 MOL OF LOT 23 MAPLE MANOR RSM 24/39 TOWN OF ATHERTON
Legal SubdivisionMAPLE MANOR
Legal Lot Number23
JurisdictionSAN MATEO CA
Township / Civil DivisionSAN MATEO
Census Block Group1
Census Block1004
Census Tract611500

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 Record2 Individual Names on Record
Mailing Address40 DE BELL DR, ATHERTON, CA 94027-2210
OccupancyOwner Occupied
Owner TypeIndividual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleApr 26, 2017 · Amount on Record
Deed SaleApr 26, 2017 · Amount on Record
Deed Document Number201735963
Record UpdatedOct 29, 2026

April 2017: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionSAN MATEO CA
Recording DateApr 26, 2017
Property Address40 DE BELL DR, ATHERTON, CA 94027-2210
Document Number0000035963
Map ReferenceMAP24 PG39
Instrument DateApr 13, 2017
Instrument2017-035963
Transaction TypeTransfer
Record UpdatedAug 5, 2022
Title CompanyLAWYERS TITLE COMPANY

Transaction

AmountAmount Recorded
DownpaymentDownpayment on Record
Loan-to-Value (LTV)LTV on Record
Tax$0.00
Amount AccuracyRounded by County
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCommunity Property with Right of Survivorship
Address40 DE BELL DR, ATHERTON, CA 94027-2210

Mortgage

Document Number0000035964
DateApr 26, 2017
Instrument2017-035964
Lender
NameFIRST REPUBLIC BANK
TypeBank
Agreement
TypeARM
AmountAmount Recorded
Term361 Months
DueMay 1, 2047
Interest
Rate TypeAdjustable Rate
Rate2.55%
Type Change DateJul 1, 2022
Change FrequencyMonthly
Min Rate At Change2.5%
Index1-Month LIBOR
Max Rate9.95%

Tax Assessment & Valuation

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

Property Jurisdictions

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

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$10,306,346 (+2%) Land $4,569,456 Building $5,736,890
2025$113,220.00 (+4.72%) Homeowner's exemption$10,104,261 (+4.04%) Land $4,479,859 Building $5,624,402
2023$108,114.00 (+86.26%)$9,711,901 Land $4,305,901 Building $5,406,000
2022$58,044.00

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 ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies4 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 RiskLow
lower than 96% of the US · lower than 97.4% of California
Wildfire LikelihoodUnder 0.01% annual chance
ExposureDirect
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 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 167 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Race Communications
Fiber		10,000 / 10,000
Xfinity
Cable		2,000 / 250
AT&T
Fiber · DSL		1,000 / 1,000
Verizon
Fixed Wireless		300 / 20

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

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