San Mateo County property record for 123 Austin Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 5.5 ba · 5,583 sqft · built 2013 |
| Lot Size | 1 acres (43,566 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $13,000,000 (Mar 2016) |
| Tax Bill | $169,630 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 059-311-010 |
| Primary APN | 059-311-010 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 5.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 2 Stories |
| Building Area | 5,583 sqft Living Area |
| 1st Floor Area | 2,650 sqft |
| 2nd Floor Area | 2,933 sqft |
| Family Room | Family Room |
| Year Built | Built 2013 |
|---|---|
| Effective Year Built | Effective 2013 |
| Lot Area | 43,566 sqft |
| Lot Dimensions | 230 ft deep x 189 ft wide |
| View / Lot | Corner |
| Garage Area | 789 sqft |
| Parking Spaces | 3 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 123 AUSTIN AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-3907 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | LOT 1 BLOCK 1 ATHERTON PARK RSM 24/64 TOWN OF ATHERTON |
| Legal Subdivision | ATHERTON PARK |
| Legal Block | 1 |
| Legal Lot Number | 1 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 4 |
| Census Block | 4009 |
| Census Tract | 611400 |
Source: San Mateo County records, as of July 15, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 99 STOCKBRIDGE AVE, ATHERTON, CA 94027-3937 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 11, 2016 · Amount on Record |
| Deed Sale | Mar 11, 2016 · Amount on Record |
| Prior Sale | Oct 7, 2010 · Amount on Record |
| Deed Document Number | 201621784 |
| Record Updated | Oct 29, 2026 |
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 | $15,697,149 (+2%) Land $11,519,295 Building $4,177,854 | |
| 2025 | $169,630.00 (+2.73%) | $15,389,363 (+4.04%) Land $11,293,427 Building $4,095,936 |
| 2023 | $165,127.00 (+4.96%) | $14,791,778 Land $10,854,891 Building $3,936,887 |
| 2022 | $157,318.00 |
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 96% of the US · lower than 97.4% of California |
|---|---|
| Wildfire Likelihood | 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 168 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.
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