90 Walnut Ave, Atherton, CA 94027 Property Records

San Mateo County property record for 90 Walnut Ave, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,090 sqft · built 1990
Lot Size	0.15 acres (6,550 sqft)
Owner	2 Individual Names on File
Last Sale	$3,410,000 (Feb 2026)
Tax Bill	$28,276 (2025)
Deeds & Mortgages	Feb 2026 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`060-332-240`

Property Details

APN / Parcel Number

Primary APN	`060-332-240`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	2 Stories
Building Area	2,090 sqft Living Area
Gross Area	2,580 sqft
1st Floor Area	1,140 sqft
2nd Floor Area	950 sqft
Basement Area	490 sqft
Family Room	Family Room
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1990
Effective Year Built	Effective 1990
Architectural Style	Bungalow
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Composition Shingle
Lot Area	6,550 sqft (0.15 acres)
Lot Dimensions	131 ft deep x 50 ft wide
Garage Area	528 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	90 WALNUT AVE
City	ATHERTON
State	CA
Zip	94027-3821
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	LOT 18 BLOCK B MENLO PARK VILLA LOTS RSM 1/93 TOWN OF ATHERTON
Legal Subdivision	MENLO PARK VILLA
Legal Block	B
Legal Lot Number	18
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	2
Census Block	2024
Census Tract	611500

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 Record	2 Individual Names on File
Mailing Address	90 WALNUT AVE, ATHERTON, CA 94027-3821
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Feb 2, 2026 · Amount on Record
Deed Sale	Feb 2, 2026 · Amount on Record
Prior Sale	May 20, 2015 · Amount on Record
Deed Document Number	20265046
Prior Transfer Date	Dec 8, 2003
Prior Transfer Doc	0000347284
Record Updated	Sep 20, 2026

February 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SAN MATEO CA
Recording Date	Feb 2, 2026
Property Address	90 WALNUT AVE, ATHERTON, CA 94027-3821
Document Number	0000005046
Map Reference	MB 6 PG 295
Instrument Date	Jan 22, 2026
Instrument	2026-005046
Transaction Type	Transfer
Record Updated	Mar 6, 2026
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$3,751.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property with Right of Survivorship
Address	90 WALNUT AVE, ATHERTON, CA 94027-3821

Mortgage

Document Number	0000005047
Date	Feb 2, 2026
Instrument	2026-005047

Lender

Name	BANK OF AMERICA NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Mar 1, 2056

Interest

Rate Type	Adjustable Rate
Rate	4.75%
Type Change Date	Mar 1, 2033
Change Frequency	6 Months
Min Rate At Change	2.62%
Max Rate At Change	9.75%
Index	SOFR Average 30-Day
Max Rate	9.75%

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	Menlo Park City Elementary School District (KG - 08)
Secondary School District	Sequoia Union High School District (09 - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$2,359,824 (+2%) Land $1,575,259 Building $784,565
2025	$28,276.00 (+2.84%)	$2,313,554 (+4.04%) Land $1,544,372 Building $769,182
2024	$27,495.00 (+2.11%)
2023	$26,928.00 (+2.47%)	$2,223,717 Land $1,484,403 Building $739,314	$2,941,110
2022	$26,278.00

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 Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	4 in force

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 98% of the US · lower than 98.4% of California
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond ember reach

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

Provider	Max 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: California Internet, Etheric Communications, LLC., Sonic Telecom, T-Mobile USA.