265 Polhemus Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 265 Polhemus Ave, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	5 bd · 9.5 ba · 12,905 sqft · built 2021
Lot Size	1 acres (43,856 sqft)
Owner	2 Company Names on Record
Last Sale	$14,600,000 (Sep 2020)
Tax Bill	$257,934 (2025)
Deeds & Mortgages	Mar 2022 Mortgage Sep 2020 Sale + 2 more
Flood Zone	Zone X (minimal risk)
APN	`070-032-400`

Property Details

APN / Parcel Number

Primary APN	`070-032-400`

Interior

Bedrooms	5 Beds
Full Baths	9.5 Baths
Half Baths	1 Half Bath
Total Rooms	21 Rooms
Stories	2 Stories
Building Area	12,905 sqft Living Area
1st Floor Area	4,471 sqft
2nd Floor Area	2,619 sqft
Basement Area	5,815 sqft
Finished Basement	5,815 sqft
Family Room	Family Room

Exterior

Year Built	Built 2021
Effective Year Built	Effective 2021
Architectural Style	Ranch
Exterior Material	Stucco
Roof Material	Wood Shingle
Lot Area	43,856 sqft
Lot Dimensions	265 ft deep x 165 ft wide
Garage Area	288 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	265 POLHEMUS AVE
City	ATHERTON
State	CA
Zip	94027-5442
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	PARCEL 1 1.006 AC MOL PARCEL MAP VOL 32/35
Legal Subdivision	POLHEMUS
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, 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 Record	2 Company Names on Record
Mailing Address	265 POLHEMUS AVE, ATHERTON, CA 94027-5442
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Mar 4, 2022	Deed of Trust, Mortgage · Conventional Mortgage GOLDMAN SACHS BANK USA
Sep 21, 2020	Grant Deed, Transfer LAWYERS TITLE
Feb 14, 2019	Trustee's Deed, Construction Loan · Construction Mortgage FIRST REPUBLIC BK
Sep 27, 2018	Grant Deed, Transfer · Line of Credit FIRST REPUBLIC BANK

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 21, 2020 · Amount on Record
Deed Sale	Sep 21, 2020 · Amount on Record
Prior Sale	Sep 27, 2018 · Amount on Record
Deed Document Number	202098597
Record Updated	Oct 29, 2026

March 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	265 POLHEMUS AVE, ATHERTON, CA 94027-5442
Transaction Type	Mortgage
Record Updated	Apr 4, 2022
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000019223
Date	Mar 4, 2022
Instrument	2022-019223

Lender

Name	GOLDMAN SACHS BANK USA
Type	Bank
Address	NEW YORK, NY 10282

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Apr 1, 2052

Interest

Rate Type	Adjustable Rate
Rate	2.7%
Type Change Date	Apr 1, 2032
Change Frequency	6 Months
Min Rate At Change	3%
Max Rate At Change	7.7%
Index	Other
Margin	3
Max Rate	7.7%

September 2020: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Sep 21, 2020
Property Address	265 POLHEMUS AVE, ATHERTON, CA 94027-5442
Document Number	0000098597
Instrument Date	Sep 17, 2020
Instrument	98597
Transaction Type	Transfer
Record Updated	Oct 26, 2020
Title Company	LAWYERS TITLE

Transaction

Amount	Amount Recorded
Tax	$16,060.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	2270 CAMINO A LOS CERROS MENLO PARK CA 940256536, MENLO PARK, CA 94025-6536

February 2019: Trustee's Deed, Construction Loan

Document Type	Trustee's Deed
Jurisdiction	SAN MATEO CA
Recording Date	Feb 14, 2019
Property Address	265 POLHEMUS AVE, ATHERTON, CA 94027-5442
Instrument Date	Feb 7, 2019
Instrument	10419
Transaction Type	Construction Loan
Record Updated	Mar 5, 2019

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	265 POLHEMUS AVE ATHERTON CA 940275442, ATHERTON, CA 94027-5442

Mortgage

Document Number	0000010419
Date	Feb 14, 2019
Instrument	10419

Lender

Name	FIRST REPUBLIC BK
Type	Bank
Address	111 PINE ST, SAN FRANCISCO, CA 94111-5602

Agreement

Type	Construction Mortgage
Amount	Amount Recorded
Term	24 Months
Due	Feb 13, 2021

Interest

Rate Type	Adjustable Rate
Rate	5.5%

September 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Sep 27, 2018
Property Address	265 POLHEMUS AVE, ATHERTON, CA 94027-5442
Document Number	0000075383
Map Reference	VOL32 PG3
Instrument Date	Sep 18, 2018
Instrument	2018-075383
Transaction Type	Transfer
Record Updated	Aug 9, 2021
Title Company	FIRST AMERICAN TITLE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	702 OAK GROVE AVE APT 3RD, MENLO PARK, CA 94025-4324

Mortgage

Document Number	0000075384
Date	Sep 27, 2018
Instrument	2018-075384

Lender

Name	FIRST REPUBLIC BANK
Type	Bank

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

Tax Assessment & Valuation

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

Year	Tax Bill	Assessed Value
2026		$23,815,668 (+2%) Land $11,040,807 Building $12,774,861
2025	$257,934.00 (+2.8%)	$23,348,696 (+4.04%) Land $10,824,321 Building $12,524,375
2023	$250,912.00 (+2.85%)	$22,442,040 Land $10,404,000 Building $12,038,040
2022	$243,958.00

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 Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 10 policies
Nearby Flood Policies	10 in force
Nearby Flood Claims	1 (2022)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Dec 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 Risk	Low lower than 95% of the US · lower than 97% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	Direct 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 System	CALIFORNIA WATER SERVICE - BEAR GULCH private · serves 60,382 people · EPA ID CA4110006
Water Source	Surface water
Last State Inspection	Feb 2025
Lead	4 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None 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

Provider	Max Down / Up (Mbps)
Race Communications 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 Networks.

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