San Mateo County property record for 52 Atherton Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 6 bd · 6.5 ba · 9,910 sqft · built 1929 |
| Lot Size | 2.87 acres (125,249 sqft) |
| Owner | Company Name on Record |
| Last Sale | $17,250,000 (Jun 2017) |
| Tax Bill | $220,600 (2025) |
| Deeds & Mortgages | Jun 2017 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-110-090 |
| Primary APN | 070-110-090 |
|---|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 6.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 17 Rooms |
| Stories | 2 Stories |
| Building Area | 9,910 sqft Living Area |
| Gross Area | 11,580 sqft |
| 1st Floor Area | 2,090 sqft |
| 2nd Floor Area | 2,070 sqft |
| Attic | Attic |
| Attic Area | 1,300 sqft |
| Basement Area | 2,290 sqft |
| Finished Basement | 1,920 sqft |
| Unfinished Basement | 370 sqft |
| Family Room | Family Room |
| Year Built | Built 1929 |
|---|---|
| Effective Year Built | Effective 1934 |
| Lot Area | 125,249 sqft |
| Lot Dimensions | 402 ft deep x 311 ft wide |
| View / Lot | Corner |
| Garage Area | 640 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 52 ATHERTON AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-4019 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | 2.875 ACS OF LD ON ATHERTON AVE COM 1364.5 FT FR STATE HIGHWAY PORT 420 AC TRACT OF H I SELBY ACREAGE TOWN OF ATHERTON REDWOOD SCHOOL DIST |
| Legal Subdivision | TRACT OF H I SELBY |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 4 |
| Census Block | 4014 |
| Census Tract | 611400 |
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 | Company Name on Record |
|---|---|
| Mailing Address | 2131 19TH AVE, 202, SAN FRANCISCO, CA 94116-1868 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 23, 2017 · Amount on Record |
| Deed Sale | Jun 23, 2017 · Amount on Record |
| Deed Document Number | 201753798 |
| Prior Transfer Date | May 5, 2015 |
| Prior Transfer Doc | 0000050471 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Jun 23, 2017 |
| Property Address | 52 ATHERTON AVE, ATHERTON, CA 94027-4019 |
| Document Number | 0000053798 |
| Instrument Date | Jun 5, 2017 |
| Instrument | 53798 |
| Transaction Type | Transfer |
| Record Updated | Aug 8, 2017 |
| Title Company | CHICAGO TITLE COMPANY, CHICAGO TITLE CO |
| Amount | Amount Recorded |
|---|---|
| Tax | $18,975.00 |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 2131 19TH AVE #202 SAN FRANCISCO CA 941161868, 202, SAN FRANCISCO, CA 94116-1868 |
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 | Redwood City Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $20,420,505 (+2%) Land $20,124,558 Building $295,947 | |
| 2025 | $220,600.00 (+2.74%) | $20,020,104 (+4.04%) Land $19,729,959 Building $290,145 |
| 2023 | $214,712.00 (+4.95%) | $19,242,701 Land $18,963,822 Building $278,879 |
| 2022 | $204,580.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 | 7 in force |
| Nearby Flood Claims | 8 (1979–2019) |
| Claims Outside the SFHA | 2 of 8 |
| Most Recent Claim | Jan 2019 · other causes |
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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | Direct burnable vegetation |
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 283 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Race Communications Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Etheric Networks, GeoLinks, T-Mobile.
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