1. Home
  2. California
  3. San Mateo County
  4. Atherton
  5. Polhemus Ave

255 Polhemus Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 255 Polhemus Ave, Atherton, CA 94027

Property Summary

Property TypeSingle Family Home
Details6 bd · 3.5 ba · 3,220 sqft · built 1954
Lot Size1.06 acres (46,379 sqft)
Owner2 Company Names on File
Tax Bill$4,002 (2025)
Deeds & MortgagesFeb 2020 Transfer
Jun 2018 Transfer
Flood ZoneZone X (minimal risk)
APN070-040-010

Property Details

APN / Parcel Number

Primary APN070-040-010

Interior

Bedrooms6 Beds
Full Baths3.5 Baths
Half Baths1 Half Bath
Total Rooms11 Rooms
Building Area3,220 sqft Living Area
1st Floor Area2,620 sqft
Family RoomFamily Room

Exterior

Year BuiltBuilt 1954
Effective Year BuiltEffective 1954
Lot Area46,379 sqft
Lot Dimensions150 ft deep x 286 ft wide
View / LotCorner

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral

Location & Zoning

Street Address255 POLHEMUS AVE
CityATHERTON
StateCA
Zip94027-5442
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR1001A
Legal DescriptionLOT 1 POLHEMUS PARK RSM 39/36 TOWN OF ATHERTON
Legal SubdivisionPOLHEMUS PARK
Legal Lot Number1
JurisdictionSAN MATEO CA
Township / Civil DivisionSAN MATEO
Census Block Group3
Census Block3003
Census Tract611400

Owner

Source: San Mateo County assessment roll, 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 Company Names on File
Mailing Address1185 ALTSCHUL AVE, MENLO PARK, CA 94025-6601
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust

Deeds, Mortgages & Sale History

DateDocument
Feb 7, 2020Quit Claim Deed, Transfer
ATTORNEY ONLY
Jun 27, 2018Quit Claim Deed, Transfer
ATTORNEY ONLY

Assessor's Deed Record

Deed Names2 Verified Names on Deed
Last Transfer DateJan 29, 2020
Transfer Doc0000010797
Record UpdatedSep 20, 2026

February 2020: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSAN MATEO CA
Recording DateFeb 7, 2020
Property Address255 POLHEMUS AVE, ATHERTON, CA 94027-5442
Document Number0000010797
Instrument DateJan 29, 2020
Instrument10797
Transaction TypeTransfer
Record UpdatedMar 2, 2020
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer
  • Partial Interest

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipRevocable Trust
Address1185 ALTSCHUL AVE MENLO PARK CA 940256601, MENLO PARK, CA 94025-6601

June 2018: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSAN MATEO CA
Recording DateJun 27, 2018
Property Address255 POLHEMUS AVE, ATHERTON, CA 94027-5442
Document Number0000050238
Instrument DateJun 12, 2018
Instrument50238
Transaction TypeTransfer
Record UpdatedJul 17, 2018
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer
  • Partial Interest

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipRevocable Trust
Address255 POLHEMUS AVE ATHERTON CA 940275442, ATHERTON, CA 94027-5442

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 DistrictLas Lomitas Elementary School District (KG - 08)
Secondary School DistrictSequoia Union High School District (09 - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$242,267 (+2%) Land $116,500 Building $125,767
2025$4,002.00 (+3.92%) Homeowner's exemption$237,517 (+4.04%) Land $114,216 Building $123,301
2023$3,851.00 (+2.94%) Homeowner's exemption$228,296 Land $109,782 Building $118,514$5,483,430
2022$3,741.00

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

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
Flood Insurance CostPremium on Record
median of 10 policies
Nearby Flood Policies10 in force
Nearby Flood Claims1 (2022)
Claims Outside the SFHA1 of 1
Most Recent ClaimDec 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 RiskLow
lower than 95% of the US · lower than 97% of California
Wildfire LikelihoodUnder 0.01% annual chance
ExposureDirect
burnable vegetation at the parcel

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 136 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Race Telecommunications
Fiber		10,000 / 10,000
AT&T
Fiber · Fixed Wireless, DSL in parts of the area		5,000 / 5,000
Xfinity
Cable		2,000 / 250
Verizon
Fixed Wireless		300 / 20

May also be available: Etheric Communications, LLC..

Nearby Properties on Polhemus Ave

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures