Home California San Mateo County Atherton Rittenhouse Ave
85 Rittenhouse Ave, Atherton, CA 94027 Property Records
San Mateo County property record for 85 Rittenhouse Ave, Atherton, CA 94027
Property Summary
Property Type Single Family Home Details 3 bd · 2 ba · 1,590 sqft · built 1954 Lot Size 0.335 acres (14,573 sqft) Owner 2 Trust Names on File Last Sale $5,600,000 (Mar 2026) Tax Bill $50,292 (2025) Deeds & Mortgages Mar 2026 Sale Apr 2024 Transfer + 5 more Flood Zone Zone X (minimal risk)APN 060-302-060
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Property Details APN / Parcel Number
Interior
Bedrooms 3 Beds Full Baths 2 Baths Total Rooms 5 Rooms Stories 1 Story Building Area 1,590 sqft Living Area 1st Floor Area 1,590 sqft Family Room Family Room Fireplaces 1 Fireplace Fireplace Fireplace
Exterior
Year Built Built 1954 Effective Year Built Effective 1954 Lot Area 14,573 sqft (0.335 acres) Lot Dimensions 146 ft deep x 102 ft wide Garage Area 470 sqft Parking Spaces 2 Parking Spaces
Utilities, Heating & Cooling Cooling System Central Heating System Central
Location & Zoning Street Address 85 RITTENHOUSE AVE City ATHERTON State CA Zip 94027-3852 Property Category Residential Property Type Residential > Single Family > Home Local Zoning Code R1001A Legal Description LOT 14 BLOCK 5 LLOYDEN PARK RSM 16/29 30 TOWN OF ATHERTON Legal Subdivision LLOYDEN PARK Legal Block 5 Legal Lot Number 14 Jurisdiction SAN MATEO CA Township / Civil Division SAN MATEO Census Block Group 2 Census Block 2014 Census Tract 611500
Owner
85 Rittenhouse Ave is owner-occupied and held in a trust since March 2026.
Source: San Mateo County records, as of July 15, 2026
Owner of Record 2 Trust Names on File Mailing Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Occupancy Owner Occupied Owner Type Company Vesting Trust, Family Trust
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Deeds, Mortgages & Sale History
Date Document Mar 16, 2026 Grant Deed, Transfer CHICAGO TITLE COMPANY Apr 23, 2024 Correction Deed Aug 9, 2022 Grant Deed, Transfer LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY Aug 9, 2022 Intrafamily Transfer, Transfer LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY Oct 6, 2021 Intrafamily Transfer, Transfer · Conventional Mortgage JPMORGAN CHASE BANK NA Mar 5, 2021 Intrafamily Transfer, Transfer · Conventional Mortgage JPMORGAN CHASE BANK NA Apr 25, 2018 Intrafamily Transfer, Transfer · ARM FIRST REPUBLIC BANK
Assessor's Deed Record
Deed Names 2 Names on Deed Last Sale Mar 16, 2026 · Amount on File Deed Sale Mar 16, 2026 · Amount on File Prior Sale Aug 9, 2022 · Amount on File Deed Document Number 202612964 Prior Transfer Date Apr 15, 2024 Prior Transfer Doc 0000020949 Record Updated Sep 20, 2026
March 2026: Grant Deed, Transfer Document Type Grant Deed Jurisdiction SAN MATEO CA Recording Date Mar 16, 2026 Property Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Document Number 0000012964 Map Reference MB 16 PG 29&30 Instrument Date Mar 9, 2026 Instrument 2026-012964 Transaction Type Transfer Record Updated Apr 22, 2026 Title Company CHICAGO TITLE COMPANY
Transaction
Amount Amount on Record Tax $6,160.00 Amount Accuracy Rounded by County Additional
Transferred From (Grantor/Seller)
Transferred To (Grantee/Buyer)
Name Verified Name Relationship Family Trust Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Investor Possibly a Property Investor
April 2024: Correction Deed Document Type Correction Deed Jurisdiction SAN MATEO CA Recording Date Apr 23, 2024 Property Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Document Number 0000020949 Map Reference MB 16 PG 29&30 Instrument Date Apr 15, 2024 Instrument 2024-020949 Record Updated May 13, 2024
Transaction
Tax $0.00 Amount Accuracy Transfer Tax Exempt
Transferred From (Grantor/Seller)
Transferred To (Grantee/Buyer)
Name Verified Name Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852
August 2022: Grant Deed, Transfer Document Type Grant Deed Jurisdiction SAN MATEO CA Recording Date Aug 9, 2022 Property Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Document Number 0000059621 Map Reference MB 16 PG 29&30 Instrument Date Jul 28, 2022 Instrument 2022-059621 Transaction Type Transfer Record Updated Sep 2, 2022 Title Company LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY
Transaction
Amount Amount on Record Tax $4,505.60 Amount Accuracy Rounded by County Additional
Transferred From (Grantor/Seller)
Transferred To (Grantee/Buyer)
Name Verified Name Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852
August 2022: Intrafamily Transfer, Transfer Document Type Intrafamily Transfer Jurisdiction SAN MATEO CA Recording Date Aug 9, 2022 Property Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Document Number 0000059622 Map Reference MB 16 PG 29&30 Instrument Date Jul 22, 2022 Instrument 2022-059622 Transaction Type Transfer Record Updated Sep 2, 2022 Title Company LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY
Transaction
Tax $0.00 Amount Accuracy Transfer Tax Exempt Additional
Transferred From (Grantor/Seller)
Transferred To (Grantee/Buyer)
Name Verified Name Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852
October 2021: Intrafamily Transfer, Transfer Document Type Intrafamily Transfer Jurisdiction SAN MATEO CA Recording Date Oct 6, 2021 Property Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Document Number 0000142071 Map Reference MB 16 PG 29&30 Instrument Date Sep 24, 2021 Instrument 2021-142071 Transaction Type Transfer Record Updated Oct 28, 2021 Title Company SERVICELINK
Transaction
Tax $0.00 Amount Accuracy Transfer Tax Exempt Additional
Transferred From (Grantor/Seller)
Transferred To (Grantee/Buyer)
Name Verified Name Relationship Joint Tenants with Right of Survivorship Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852
Mortgage
Document Number 0000142072 Date Oct 6, 2021 Instrument 2021-142072
Lender
Name JPMORGAN CHASE BANK NA Type Bank
Agreement
Type Conventional Mortgage Amount Amount on Record Term 360 Months Due Oct 1, 2051
Interest
Rate Type Adjustable Rate Rate 2.87% Type Change Date Oct 1, 2031 Change Frequency Monthly Min Rate At Change 2.75% Max Rate At Change 7.87% Index Other Max Rate 7.87%
March 2021: Intrafamily Transfer, Transfer Document Type Intrafamily Transfer Jurisdiction SAN MATEO CA Recording Date Mar 5, 2021 Property Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Document Number 0000036721 Map Reference MB 16 PG 29&30 Instrument Date Jan 11, 2021 Instrument 2021-036721 Transaction Type Transfer Record Updated Aug 9, 2021 Title Company ACCOMODATION, ACCOMMODATION
Transaction
Tax $0.00 Amount Accuracy Transfer Tax Exempt Additional
Transferred From (Grantor/Seller)
Transferred To (Grantee/Buyer)
Name Verified Name Address 134 TUSCALOOSA AVE, ATHERTON, CA 94027-4017
Mortgage
Document Number 0000036722 Date Mar 5, 2021 Instrument 2021-036722
Lender
Name JPMORGAN CHASE BANK NA Type Bank
Agreement
Type Conventional Mortgage Amount Amount on Record Term 359 Months Due Feb 1, 2051
Interest
Rate Type Adjustable Rate Rate 3.25% Type Change Date Feb 1, 2031 Change Frequency 6 Months Min Rate At Change 2.75% Max Rate At Change 8.25% Index Other Max Rate 8.25%
April 2018: Intrafamily Transfer, Transfer Document Type Intrafamily Transfer Jurisdiction SAN MATEO CA Recording Date Apr 25, 2018 Property Address 85 RITTENHOUSE AVE, ATHERTON, CA 94027-3852 Document Number 0000031351 Map Reference MB16 PG29&30 Instrument Date Apr 20, 2018 Instrument 2018-031351 Transaction Type Transfer Record Updated Aug 9, 2021 Title Company FIDELITY NATIONAL TITLE CO
Transaction
Tax $0.00 Amount Accuracy Transfer Tax Exempt Additional
Transferred From (Grantor/Seller)
Name Verified Name Address 00000
Transferred To (Grantee/Buyer)
Name Verified Name Relationship Revocable Trust Address 33321 DOWE AVE, UNION CITY, CA 94587-2033
Mortgage
Document Number 0000031352 Date Apr 25, 2018 Instrument 2018-031352
Lender
Name FIRST REPUBLIC BANK Type Bank
Agreement
Type ARM Amount Amount on Record Term 361 Months Due May 1, 2048
Interest
Rate Type Adjustable Rate Rate 4% Change Frequency Annually Min Rate At Change 2.5% Max Rate At Change 9.95% Index LIBOR Max Rate 9.95%
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Tax Assessment & Valuation
The 2025 property tax bill for 85 Rittenhouse Ave was $50,292, up 1.5% from the year before.
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 Redwood 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 $4,578,740 (+2%) Land $3,342,805 Building $1,235,935 2025 $50,292.00 (+1.49%) Homeowner's exemption $4,488,962 Land $3,277,260 Building $1,211,702 2024 $49,552.00 (+6.39%) 2023 $46,575.00 (+98.19%) $4,096,000 Land $3,150,000 Building $946,000 $3,529,260 2022 $23,500.00
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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Flood
FEMA maps place 85 Rittenhouse Ave in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
FEMA Flood Zone Zone Xminimal risk Flood Insurance Requirement Not requiredlenders 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
Wildfire risk around 85 Rittenhouse Ave is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
Wildfire Risk Lowlower than 98% of the US · lower than 98.4% of California Wildfire Likelihood 0.01% annual chance Exposure Nonebeyond 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 GULCHprivate · 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 Nonelast 10 years Treatment and Procedure Nonelast 10 years Monitoring and Reporting Nonelast 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 487 locations within half a mile, as of December 31, 2025
Provider Max Down / Up (Mbps) AT&TFiber · DSL · Fixed Wireless in parts of the area 5,000 / 5,000 XfinityCable 2,000 / 250 VerizonFixed Wireless 300 / 20 Etheric NetworksFixed Wireless 250 / 100 T-MobileFixed Wireless 100 / 20
May also be available: Astound Broadband, GeoLinks, Race Communications, Sonic Telecom.
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