253 Polhemus Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 253 Polhemus Ave, Atherton, CA 94027 · Last verified July 2026

Property Summary

Property Type	Single Family Home
Details	5 bd · 4.5 ba · 6,410 sqft · built 2004
Lot Size	1.03 acres (45,137 sqft)
Owner	Company Name on File
Last Sale	$9,000,000 (May 2004)
Tax Bill	$141,407 (2025)
Deeds & Mortgages	Dec 2020 Transfer
Flood Zone	Zone X (minimal risk)
APN	`070-040-020`

Property Details

APN / Parcel Number

Primary APN	`070-040-020`

Interior

Bedrooms	5 Beds
Full Baths	4.5 Baths
Half Baths	1 Half Bath
Total Rooms	13 Rooms
Stories	2 Stories
Building Area	6,410 sqft Living Area
1st Floor Area	3,550 sqft
2nd Floor Area	2,860 sqft
Family Room	Family Room
Study	Study

Exterior

Year Built	Built 2004
Effective Year Built	Effective 2004
Lot Area	45,137 sqft
Lot Dimensions	277 ft deep x 172 ft wide
Garage Area	800 sqft
Parking Spaces	3 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	253 POLHEMUS AVE
City	ATHERTON
State	CA
Zip	94027-5442
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 2 POLHEMUS PARK RSM 39/36 TOWN OF ATHERTON
Legal Subdivision	POLHEMUS PARK
Legal Lot Number	2
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	3
Census Block	3003
Census Tract	611400

Owner

Source: San Mateo County records · APN 070-040-020

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 Record	Company Name on File
Mailing Address	253 POLHEMUS AVE, ATHERTON, CA 94027-5442
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	May 14, 2004 · Amount on Record
Deed Sale	May 14, 2004 · Amount on Record
Prior Sale	Mar 31, 2003 · Amount on Record
Deed Document Number	200498750
Last Transfer Date	Dec 26, 2012
Transfer Doc	0000197767
Record Updated	Sep 20, 2026

December 2020: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	SAN MATEO CA
Recording Date	Dec 28, 2020
Property Address	253 POLHEMUS AVE, ATHERTON, CA 94027-5442
Document Number	0000152902
Instrument Date	Dec 24, 2020
Instrument	152902
Transaction Type	Transfer
Record Updated	Feb 03, 2021
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer Partial Interest

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	253 POLHEMUS AVE ATHERTON CA 940275442, ATHERTON, CA 94027-5442

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	California
Municipality	Atherton Town
County	San Mateo County
Elementary School District	Las Lomitas Elementary School District (KG - 08)
Secondary School District	Sequoia 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.

Year	Tax Bill	Assessed Value
2026		$13,052,090 (+2%) Land $8,701,396 Building $4,350,694
2025	$141,407.00 (+2.79%)	$12,796,168 (+4.04%) Land $8,530,781 Building $4,265,387
2023	$137,566.00 (+2.85%)	$12,299,278 Land $8,199,521 Building $4,099,757
2022	$133,759.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, San Mateo County (06081C), updated September 10, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060816114003, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X
Special Flood Hazard Area	No
Flood Hazard	Minimal
500-Year Floodplain	No
Flood Insurance Cost	Premium on Record median of 10 individual NFIP policies nearby
Nearby Flood Policies	10 in force
Nearby Flood Claims	1 (2022)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Dec 2022, rainfall accumulation, Severe Winter Storms, Flooding, Landslides, And Mudslides

Wildfire

Wildfire Risk	Low above 5% of the US · above 3% of California
Wildfire Likelihood	Less than 1 in 10,000 per year
Exposure	Direct burnable vegetation at the parcel

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.

Internet Providers

Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 136 locations within about half a mile of this property

Provider	Technology	Download / Upload (Mbps)
Race Telecommunications	Fiber	10,000 / 10,000
AT&T	Fiber	5,000 / 5,000
Xfinity	Cable	2,000 / 250
Verizon	Fixed Wireless	300 / 20

May also be available at this address: AT&T, Etheric Communications, LLC.. Availability varies by address; speeds are provider-advertised maximums, not measured.