580 Middlefield Rd, Atherton, CA 94027 Property Records

San Mateo County property record for 580 Middlefield Rd, Atherton, CA 94027

Property Summary

Property Type	Single Family Home
Details	6 bd · 4 ba · 4,390 sqft · built 1952
Lot Size	1 acres (43,560 sqft)
Owner	2 Company Names on Record
Last Sale	$2,000,000 (May 2010)
Tax Bill	$46,743 (2025)
Deeds & Mortgages	Dec 2025 Transfer Apr 2022 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`061-281-140`

Property Details

APN / Parcel Number

Primary APN	`061-281-140`

Interior

Bedrooms	6 Beds
Full Baths	4 Baths
Total Rooms	11 Rooms
Stories	1 Story
Building Area	4,390 sqft Living Area
1st Floor Area	2,010 sqft
Family Room	Family Room
Study	Study

Exterior

Year Built	Built 1952
Effective Year Built	Effective 1952
Lot Area	43,560 sqft
Lot Dimensions	217 ft deep x 201 ft wide
Garage Area	880 sqft
Parking Spaces	4 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	580 MIDDLEFIELD RD
City	ATHERTON
State	CA
Zip	94027-3414
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R1001A
Legal Description	LOT 4 OAKWOOD MANOR RSM 31/31 TOWN OF ATHERTON
Legal Subdivision	OAKWOOD MANOR
Legal Lot Number	4
Jurisdiction	SAN MATEO CA
Township / Civil Division	SAN MATEO
Census Block Group	1
Census Block	1008
Census Tract	611500

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	580 MIDDLEFIELD RD, ATHERTON, CA 94027-3414
Owner Type	Company
Vesting	Life Tenant

Deeds, Mortgages & Sale History

Date	Document
Dec 4, 2025	Intrafamily Transfer, Transfer
Apr 7, 2022	Deed of Trust, Mortgage · Conventional Mortgage BANK OF AMERICA NA
Aug 19, 2019	Deed of Trust, Mortgage BANK OF AMERICA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	May 27, 2010 · Amount on Record
Deed Sale	May 27, 2010 · Amount on Record
Deed Document Number	201058000
Prior Transfer Date	Feb 7, 1997
Prior Transfer Doc	0000016897
Record Updated	Oct 29, 2026

December 2025: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	SAN MATEO CA
Recording Date	Dec 4, 2025
Property Address	580 MIDDLEFIELD RD, ATHERTON, CA 94027-3414
Document Number	0000066287
Map Reference	MB 31 PG 31
Instrument Date	Nov 8, 2025
Instrument	2025-066287
Transaction Type	Transfer
Record Updated	Dec 31, 2025

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Living Trust
Address	580 MIDDLEFIELD RD, ATHERTON, CA 94027-3414

April 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	580 MIDDLEFIELD RD, ATHERTON, CA 94027-3414
Transaction Type	Mortgage
Record Updated	Aug 5, 2022

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	580 MIDDLEFIELD RD, ATHERTON, CA 94027-3414

Mortgage

Document Number	0000029781
Date	Apr 7, 2022
Instrument	2022-029781

Lender

Name	BANK OF AMERICA NA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

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

Interest

Rate Type	Adjustable Rate
Rate	2.12%
Type Change Date	May 1, 2032
Change Frequency	6 Months
Min Rate At Change	2.62%
Max Rate At Change	7.12%
Index	Other
Max Rate	7.12%

August 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	580 MIDDLEFIELD RD, ATHERTON, CA 94027-3414
Document Number	0000086044
Instrument Date	Aug 19, 2019
Transaction Type	Mortgage
Record Updated	Nov 5, 2019
Title Company	FIRST AMERICAN TITLE, FIRST AMERICAN TITLE INSURANCE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	580 MIDDLEFIELD RD ATHERTON CA 940273414, ATHERTON, CA 94027-3414

Mortgage

Document Number	0000086044
Date	Oct 16, 2019
Instrument	86044

Lender

Name	BANK OF AMERICA
Type	Bank
Address	20 GREENWAY PLZ # 900TX6, HOUSTON, TX 77046-2011

Agreement

Amount	Amount Recorded
Term	180 Months
Due	Oct 15, 2034

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		$4,085,860 (+2%) Land $2,501,613 Building $1,584,247
2025	$46,743.00 (+2.83%)	$4,005,748 (+4.04%) Land $2,452,562 Building $1,553,186
2024	$45,455.00 (+2%)
2023	$44,562.00 (+2.44%)	$3,850,208 Land $2,357,327 Building $1,492,881	$5,707,170
2022	$43,499.00

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	Not rated no burnable land within 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 172 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless · Fiber, DSL in parts of the area	100 / 20
T-Mobile Fixed Wireless	100 / 20

May also be available: Etheric Networks, Race Communications, Sonic Telecom.

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