San Mateo County property record for 220 Atherton Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 5 ba · 4,310 sqft · built 1954 |
| Lot Size | 1.38 acres (60,170 sqft) |
| Owner | Company Name on File |
| Last Sale | $16,500,000 (Oct 2021) |
| Tax Bill | $187,439 (2025) |
| Deeds & Mortgages | Oct 2021 Sale Jan 2017 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-040-580 |
| Primary APN | 070-040-580 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 5 Baths |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 4,310 sqft Living Area |
| 1st Floor Area | 3,710 sqft |
| Family Room | Family Room |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1954 |
| Lot Area | 60,170 sqft |
| Lot Dimensions | 298 ft deep x 177 ft wide |
| Garage Area | 1,120 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 220 ATHERTON AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-5419 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | 1.38 AC MOL BEING LOT 3 DWIGHT LANE SUB RSM 35/48 & ADJ PTN OF LOT 3 WOOD OAKS RSM 46/47 TOWN OF ATHERTON |
| Legal Subdivision | DWIGHT LANE SUB |
| Legal Lot Number | 3 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 3 |
| Census Block | 3003 |
| Census Tract | 611400 |
220 Atherton Ave is owned by a company that bought it in October 2021.
Source: San Mateo County records, as of August 6, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 405 EL CAMINO REAL, MENLO PARK, CA 94025-5240 |
| Owner Type | Company |
| Vesting | Limited Liability Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Oct 6, 2021 | Grant Deed, Transfer FIRST AMERICAN TITLE COMPANY GLENDALE, FIRST AMER TTL CO GLENDALE |
| Jan 3, 2017 | Deed of Trust, Mortgage · ARM MORGAN STANLEY PRIVATE BANK NA |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 6, 2021 · Amount on File |
| Deed Sale | Oct 6, 2021 · Amount on File |
| Prior Sale | Aug 22, 2006 · Amount on File |
| Deed Document Number | 2021142199 |
| Prior Transfer Date | Oct 13, 2008 |
| Prior Transfer Doc | 0000115729 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Oct 6, 2021 |
| Property Address | 220 ATHERTON AVE, ATHERTON, CA 94027-5419 |
| Document Number | 0000142199 |
| Map Reference | MB 35 PG 48 |
| Instrument Date | Jul 15, 2021 |
| Instrument | 2021-142199 |
| Transaction Type | Transfer |
| Record Updated | Oct 28, 2021 |
| Title Company | FIRST AMERICAN TITLE COMPANY GLENDALE, FIRST AMER TTL CO GLENDALE |
| Amount | Amount on Record |
|---|---|
| Tax | $18,150.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 1801 PAGE MIII ROAD #100 # 100, 100, PALO ALTO, CA 94304 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 220 ATHERTON AVE, ATHERTON, CA 94027-5419 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | CORNERSTONE TITLE COMPANY |
| Name | Verified Name |
|---|
| Document Number | 0000000293 |
|---|---|
| Date | Jan 3, 2017 |
| Instrument | 2017-000293 |
| Name | MORGAN STANLEY PRIVATE BANK NA |
|---|---|
| Type | Bank |
| Address | MOUNT LAUREL, NJ 08054 |
| Type | ARM |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Jan 1, 2047 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 2.52% |
| Type Change Date | Jan 1, 2022 |
| Change Frequency | Annually |
| Min Rate At Change | 2.5% |
| Max Rate At Change | 7.52% |
| Index | 1-Year LIBOR |
| Max Rate | 7.52% |
The 2025 property tax bill for 220 Atherton Ave was $187,439, up 1.2% from the year before.
Source: San Mateo County assessment roll, as of July 15, 2026
| 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) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $17,318,914 (+2%) Land $17,318,914 | |
| 2025 | $187,439.00 (+1.2%) | $16,979,328 Land $16,979,328 |
| 2024 | $185,210.00 (+1.58%) | |
| 2023 | $182,330.00 (-0.25%) | $16,320,000 Land $16,320,000 |
| 2022 | $182,796.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 220 Atherton Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2022.
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 File 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 risk around 220 Atherton Ave is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 96% of the US · lower than 97.4% 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.
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 |
| 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.
Source: FCC Broadband Data Collection, based on 160 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Race Communications Fiber | 10,000 / 10,000 |
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Etheric Networks, Verizon.
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