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52 Middlefield Rd, Atherton, CA 94027 Property Records

San Mateo County property record for 52 Middlefield Rd, Atherton, CA 94027 · Last verified July 2026

Property Highlights

Property TypeResidential > Single Family > Home
Bedrooms5 Beds
Bathrooms5.5 Baths
Year BuiltBuilt 2020
Square Footage7,139 sqft Living Area
Lot Size1.09 acres
OccupancyOwner Occupied
Last Sale$11,400,000 (2020)
Tax Bill$137,310.00 (2025)

Property Details

APN / Parcel Number

Primary APN060-210-150

Interior

Bedrooms5 Beds
Full Baths5.5 Baths
Partial Baths1 Partial Baths
Total Rooms11 Rooms
Building Area7,139 sqft Living Area
1st Floor4,319 sqft 1st Floor
2nd Floor2,820 sqft 2nd Floor
Family RoomFamily Room
Stories2 Stories

Exterior

Year BuiltBuilt 2020
Effective Year BuiltEffective 2020
Lot Area47,524 sqft
Parking Spaces4 Parking Spaces
Garage Area1,122 sqft Garage

Utilities and HVAC

Cooling SystemCentral Cooling
Heating SystemCentral Heating

Location & Zoning

Street Address52 MIDDLEFIELD RD
CityATHERTON
StateCA
Zip94027-3020
Property UsageResidential Property Usage
TypeResidential > Single Family > Home
Legal DescriptionLOT 10 FAIR OAKS ESTATES RSM 50/26 27 TOWN OF ATHERTON
Legal SubdivisionFAIR OAKS ESTATES
Legal Lot Number10
JurisdictionSAN MATEO CA
Minor Civil DivisionSAN MATEO
Census Blockgroup2
Census Block2005
Census Tract611500

Owner

Source: San Mateo County records · APN 060-210-150

Assessment roll updated July 15, 2026 · Last verified July 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record2 Company Names on File
Mailing Address52 MIDDLEFIELD RD, ATHERTON, CA 94027-3020
OccupancyOwner Occupied
Owner TypeOwner is a Company
VestingOwner is a Trust, Trust

Deeds, Mortgages & Sale History

DateDocument
Oct 02, 2020Grant Deed, Transfer · Conventional Mortgage
FIRST REPUBLIC BANK
Aug 01, 2017Grant Deed, Transfer
LAWYERS TITLE
Mar 01, 2017Affidavit of Death, Transfer

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleOct 02, 2020 · Amount on Record
Deed SaleOct 02, 2020 · Amount on Record
Prior SaleAug 01, 2017 · Amount on Record
Deed Doc Number2020105495
Prior Transfer DateNov 08, 1995
Prior Transfer Doc0000122445
Record RefreshedSep 20, 2026

October 2020: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionSAN MATEO CA
Recording DateOct 02, 2020
Property Address52 MIDDLEFIELD RD, ATHERTON, CA 94027-3020
Document Number0000105495
Map ReferenceMB 50 PG 26&27
Instrument DateSep 28, 2020
Instrument2020-105495
Transaction TypeTransfer
Record UpdatedAug 09, 2021
Title CompanyLAWYERS TITLE COMPANY

Transaction

AmountAmount Recorded
DownpaymentDownpayment on File
Loan-to-Value (LTV)LTV on Record
Tax$12,540.00
Amount AccuracyRounded Values by County
Additional
  • Arms Length Transaction

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipFamily Trust
Address5 OAK FOREST CT, PORTOLA VALLEY, CA 94028-8063

Mortgage

Document Number0000105496
DateOct 02, 2020
Instrument2020-105496
Lender
NameFIRST REPUBLIC BANK
TypeBank
Agreement
TypeConventional Mortgage
AmountAmount Recorded
Term361 Months
DueNov 01, 2050
Interest
Rate TypeAdjustable Rate
Rate2.6%
AdjustableDocument includes a rider for adjustable-rate mortgage with a specific rate change date.
Type Change DateNov 01, 2030
Change FrequencyMonthly (Revolving credit lines are monthly unless stated otherwise).
Min Rate At Change2.95%
Max Rate At Change10.9%
Index1-Year CMT
Max Rate10.9%

August 2017: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionSAN MATEO CA
Recording DateAug 01, 2017
Property Address52 MIDDLEFIELD RD, ATHERTON, CA 94027-3020
Document Number0000066159
Instrument DateJul 24, 2017
Instrument66159
Transaction TypeTransfer
Record UpdatedAug 21, 2017
Title CompanyLAWYERS TITLE

Transaction

AmountAmount Recorded
Tax$4,400.00
Amount AccuracyFull Value
Additional
  • Arms Length Transaction

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address940 HAYNE RD HILLSBOROUGH CA 940107038, HILLSBOROUGH, CA 94010-7038

March 2017: Affidavit of Death, Transfer

Document TypeAffidavit of Death
JurisdictionSAN MATEO CA
Recording DateMar 01, 2017
Property Address52 MIDDLEFIELD RD, ATHERTON, CA 94027-3020
Document Number0000018540
Instrument DateOct 27, 2016
Instrument18540
Transaction TypeTransfer
Record UpdatedMar 21, 2017

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address52 MIDDLEFIELD RD ATHERTON CA 940273020, ATHERTON, CA 94027-3020

Tax Assessment & Valuation

Source: San Mateo County records · Assessment roll updated July 15, 2026 · Last verified July 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

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

YearTax BillAssessed Value
2026$12,586,518 (+2%) Land $6,293,259 Building $6,293,259
2025$137,310.00 (+4.75%) Homeowner's exemption$12,339,724 (+4.04%) Land $6,169,862 Building $6,169,862
2023$131,083.00 (+2.43%) Homeowner's exemption$11,860,560 Land $5,930,280 Building $5,930,280
2022$127,974.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, San Mateo County (06081C), updated September 10, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood ZoneZone X
Flood HazardMinimal
500-Year FloodplainNo
Special Flood Hazard AreaNo

Wildfire

Wildfire RiskNot rated
no burnable land in reach
Wildfire LikelihoodNegligible
ExposureNone
beyond ember reach

Values are read at the parcel center point; lenders make the official flood determination.

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