323 Stockbridge Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 323 Stockbridge Ave, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	5 bd · 4.5 ba · 6,070 sqft · built 1983
Lot Size	0.943 acres (41,077 sqft)
Owner	2 Company Names on File
Last Sale	$5,400,000 (Jul 2000)
Tax Bill	$91,952 (2025)
Deeds & Mortgages	Sep 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`070-011-270`

Property Details

APN / Parcel Number

Primary APN	`070-011-270`

Interior

Bedrooms	5 Beds
Full Baths	4.5 Baths
Half Baths	1 Half Bath
Total Rooms	14 Rooms
Stories	2 Stories
Building Area	6,070 sqft Living Area
1st Floor Area	3,690 sqft
2nd Floor Area	2,380 sqft
Family Room	Family Room
Study	Study

Exterior

Year Built	Built 1983
Effective Year Built	Effective 1983
Lot Area	41,077 sqft (0.943 acres)
Garage Area	1,230 sqft
Parking Spaces	5 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	323 STOCKBRIDGE AVE
City	ATHERTON
State	CA
Zip	94027-6442
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10000
Legal Description	PARCEL A PARCEL MAP VOL 52/64
Legal Subdivision	POLHEMUS TRACT
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	3
Census Block	3005
Census Tract	611400

Owner

Source: San Mateo County records · APN 070-011-270

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	2 Company Names on File
Mailing Address	323 STOCKBRIDGE AVE, ATHERTON, CA 94027-6442
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jul 18, 2000 · Amount on Record
Deed Sale	Jul 18, 2000 · Amount on Record
Deed Document Number	200087361
Last Transfer Date	Sep 30, 2010
Transfer Doc	0000117162
Record Updated	Sep 20, 2026

September 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	323 STOCKBRIDGE AVE, ATHERTON, CA 94027-6442
Transaction Type	Mortgage
Record Updated	Feb 05, 2021
Title Company	MORTGAGE CONNECT

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	323 STOCKBRIDGE AVE, ATHERTON, CA 94027-6442

Mortgage

Document Number	0000097075
Date	Sep 17, 2020
Instrument	2020-097075

Lender

Name	MORGAN STANLEY PRIVATE BANK NA
Type	Bank
Address	CINCINNATI, OH 45245

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Sep 01, 2050

Interest

Rate Type	Adjustable Rate
Rate	2.62%
Type Change Date	Sep 01, 2027
Change Frequency	Annually
Min Rate At Change	2.5%
Max Rate At Change	7.62%
Index	1-Year LIBOR
Max Rate	7.62%

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

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$8,446,150 (+2%) Land $4,149,871 Building $4,296,279
2025	$91,952.00 (+2.81%) Homeowner's exemption	$8,280,540 (+4.04%) Land $4,068,501 Building $4,212,039
2023	$89,437.00 (+2.85%) Homeowner's exemption	$7,959,000 Land $3,910,517 Building $4,048,483	$7,658,820
2022	$86,960.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of September 10, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

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

Wildfire

Wildfire Risk	Low lower than 98% of the US · lower than 98.4% of California
Wildfire Likelihood	Under 0.01% annual chance
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 as of December 31, 2025 · Last verified October 2026

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

May also be available: California Internet, Cruzio Internet, Etheric Communications, LLC., T-Mobile USA.

Based on FCC filings for 153 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CALIFORNIA WATER SERVICE - BEAR GULCH private · serves 60,382 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.