323 Walsh Rd, Atherton, CA 94027 Property Records

San Mateo County property record for 323 Walsh Rd, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	6 bd · 7.5 ba · 10,649 sqft · built 2016
Lot Size	1.02 acres (44,730 sqft)
Owner	Company Name on Record
Last Sale	$20,000,000 (Jan 2025)
Tax Bill	$220,486 (2025)
Deeds & Mortgages	Oct 2025 Mortgage Feb 2017 Loan Modification
Flood Zone	Zone X (minimal risk)
APN	`074-040-270`

Property Details

APN / Parcel Number

Primary APN	`074-040-270`

Interior

Bedrooms	6 Beds
Full Baths	7.5 Baths
Half Baths	1 Half Bath
Total Rooms	16 Rooms
Stories	2 Stories
Building Area	10,649 sqft Living Area
1st Floor Area	3,918 sqft
2nd Floor Area	2,982 sqft
Basement Area	3,749 sqft
Finished Basement	3,749 sqft
Family Room	Family Room

Exterior

Year Built	Built 2016
Effective Year Built	Effective 2016
Lot Area	44,730 sqft
Lot Dimensions	230 ft deep x 195 ft wide
View / Lot	Corner
Garage Area	463 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	323 WALSH RD
City	ATHERTON
State	CA
Zip	94027-6436
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	LOT 1 LEVISON ACRES RSM 67/31
Legal Subdivision	LEVISON ACRES
Legal Lot Number	1
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	3
Census Block	3008
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	Company Name on Record
Mailing Address	323 WALSH RD, ATHERTON, CA 94027-6436
Owner Type	Company
Vesting	Limited Liability Partnership

Deeds, Mortgages & Sale History

Date	Document
Oct 10, 2025	Deed of Trust, Mortgage · Conventional Mortgage JPMORGAN CHASE BANK NA
Feb 28, 2017	Loan Modification, Mortgage FIRST REPUBLIC BK

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jan 17, 2025 · Amount on Record
Deed Sale	Jan 17, 2025 · Amount on Record
Prior Sale	Mar 29, 2016 · Amount on Record
Deed Document Number	20252421
Prior Transfer Date	Jan 9, 2025
Prior Transfer Doc	0000002421
Record Updated	Sep 20, 2026

October 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	323 WALSH RD, ATHERTON, CA 94027-6436
Transaction Type	Mortgage
Record Updated	Nov 11, 2025
Title Company	OLD REPUBLIC NATIONAL INSURANCE COMPANY, OLD REPUBLIC NATIONAL INS CO

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	323 WALSH RD, ATHERTON, CA 94027-6436

Mortgage

Document Number	0000053872
Date	Oct 10, 2025
Instrument	2025-053872

Lender

Name	JPMORGAN CHASE BANK NA
Type	Bank
Address	ELGIN, IL 60124

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 1, 2055

Interest

Rate Type	Adjustable Rate
Rate	5.25%
Type Change Date	Nov 1, 2030
Change Frequency	6 Months
Min Rate At Change	3.25%
Max Rate At Change	7.25%
Index	SOFR Average 30-Day
Max Rate	10.2%

February 2017: Loan Modification, Mortgage

Document Type	Loan Modification
Jurisdiction	SAN MATEO CA
Property Address	323 WALSH RD, ATHERTON, CA 94027-6436
Document Number	0000019630
Instrument Date	Feb 28, 2017
Transaction Type	Mortgage
Record Updated	Mar 27, 2017

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	323 WALSH RD ATHERTON CA 940276436, ATHERTON, CA 94027-6436

Mortgage

Document Number	0000019630
Date	Mar 6, 2017
Instrument	19630

Lender

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

Agreement

Amount	Amount Recorded
Term	12 Months
Due	Mar 5, 2018

Interest

Rate Type	Adjustable Rate
Rate	5%

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		$20,400,000 (+2%) Land $8,884,200 Building $11,515,800
2025	$220,486.00 (-8.98%)	$20,000,000 (-6.5%) Land $12,850,000 Building $7,150,000
2024	$242,228.00 (+1.57%)
2023	$238,474.00 (+2.84%)	$21,391,190 Land $14,513,013 Building $6,878,177
2022	$231,895.00

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 99.8% of the US · lower than 99.8% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond ember reach

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

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless in parts of the area	5,000 / 5,000
Xfinity Cable	2,000 / 250
Cruzio Fixed Wireless	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100

May also be available: Race Communications, Sonic Telecom, T-Mobile.

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