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238 Polhemus Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 238 Polhemus Ave, Atherton, CA 94027 · Last verified July 2026

Property Highlights

Property TypeResidential > Single Family > Home
Bedrooms6 Beds
Bathrooms7.5 Baths
Year BuiltBuilt 2005
Square Footage11,450 sqft Living Area
Lot Size1.45 acres
GarageAttached, 520 sqft
Last Sale$5,000,000 (2000)
Tax Bill$151,821.00 (2025)

Property Details

APN / Parcel Number

Primary APN070-022-650

Interior

Bedrooms6 Beds
Full Baths7.5 Baths
Partial Baths1 Partial Baths
Total Rooms14 Rooms
Building Area11,450 sqft Living Area
Gross Area17,030 sqft Gross Area
1st Floor6,030 sqft 1st Floor
2nd Floor4,760 sqft 2nd Floor
Basement Area5,720 sqft Basement
Finished Basement660 sqft Finished
Unfinished Basement5,060 sqft Unfinished
Family RoomFamily Room
Stories2 Stories
StudyStudy

Exterior

Year BuiltBuilt 2005
Effective Year BuiltEffective 2005
Lot Area63,164 sqft
Depth X Width323 ft x 164 ft Depth x Width
Parking Spaces2 Parking Spaces
Garage TypeAttached Garage
Garage Area520 sqft Garage

Utilities and HVAC

Cooling SystemCentral Cooling
Heating SystemCentral Heating

Location & Zoning

Street Address238 POLHEMUS AVE
CityATHERTON
StateCA
Zip94027-5439
Property UsageResidential Property Usage
TypeResidential > Single Family > Home
Legal DescriptionLOT 4 LESS NWLY 8 FT X 92.50 FT POLHEMUS ESTATES RSM 46/42
Legal SubdivisionPOLHEMUS ESTATES
Legal Lot Number4
JurisdictionSAN MATEO CA
Minor Civil DivisionSAN MATEO
Census Blockgroup3
Census Block3000
Census Tract611400

Owner

Source: San Mateo County records · APN 070-022-650

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 Address238 POLHEMUS AVE, ATHERTON, CA 94027-5439
Owner TypeOwner is a Company
VestingOwner is a Trust, Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last SaleFeb 04, 2000 · Amount on Record
Deed SaleFeb 04, 2000 · Amount on Record
Deed Doc Number200014827
Last Transfer DateJan 02, 2017
Transfer Doc0000006452
Record RefreshedSep 20, 2026

January 2017: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionSAN MATEO CA
Recording DateJan 23, 2017
Property Address238 POLHEMUS AVE, ATHERTON, CA 94027-5439
Document Number0000006452
Map ReferenceMAP46 PG42
Instrument DateJan 02, 2017
Instrument2017-006452
Transaction TypeTransfer
Record UpdatedAug 09, 2021
Title CompanyTRGC

Transaction

Tax$0.00
Amount AccuracyZero or No Consideration Stated
Additional
  • Interfamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipFamily Trust
Address238 POLHEMUS AVE, ATHERTON, CA 94027-5439

Mortgage

Document Number0000006453
DateJan 23, 2017
Instrument2017-006453
Lender
NameUBS BANK USA
TypeBank
Agreement
TypeAdjustable Rate Mortgage (ARM)
AmountAmount Recorded
Term361 Months
DueFeb 01, 2047
Interest
Rate TypeAdjustable Rate
Rate3.12%
Type Change DateFeb 01, 2024
Change FrequencyAnnually
Min Rate At Change2.25%
Max Rate At Change8.12%
Index1-Year LIBOR
Max Rate8.12%

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 DistrictLas Lomitas 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$14,023,468 (+2%) Land $7,838,657 Building $6,184,811
2025$151,821.00 (+2.79%)$13,748,499 (+4.04%) Land $7,684,958 Building $6,063,541
2023$147,700.00 (+2.85%)$13,214,631 Land $7,386,543 Building $5,828,088
2022$143,612.00

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