San Mateo County property record for 50 Elena Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 6 bd · 4.5 ba · 4,570 sqft · built 1957 |
| Lot Size | 1.03 acres (45,192 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $5,482,000 (Apr 2005) |
| Tax Bill | $86,419 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-212-040 |
| Primary APN | 070-212-040 |
|---|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 4,570 sqft Living Area |
| 1st Floor Area | 3,690 sqft |
| 2nd Floor Area | 630 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1957 |
| Architectural Style | Ranch |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Material | Wood Shingle |
| Lot Area | 45,192 sqft |
| Lot Dimensions | 278 ft deep x 167 ft wide |
| Garage Area | 940 sqft |
| Parking Spaces | 4 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 50 ELENA AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-4026 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | 1.04 AC ON ELENA AVE COM 466.10 FT SELY FRM ATHERTON AVE PTNLOT 5 VALPARAISO PARK RSM 19/10 TOWN OF |
| Legal Subdivision | PARAISO PARK |
| Legal Lot Number | 5 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1009 |
| Census Tract | 611400 |
50 Elena Ave is held in a trust since April 2005.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 50 ELENA AVE, ATHERTON, CA 94027-4026 |
| Owner Type | Company |
| Vesting | Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 1, 2005 · Amount on File |
| Deed Sale | Apr 1, 2005 · Amount on File |
| Prior Sale | Nov 23, 2004 · Amount on File |
| Deed Document Number | 200552250 |
| Prior Transfer Date | Oct 25, 1995 |
| Prior Transfer Doc | 0000123724 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 50 Elena Ave was $86,419.
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 | Menlo Park City Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $7,794,276 (+2%) Land $7,748,792 Building $45,484 | ||
| 2025 | $86,419.00 | $7,641,448 Land $7,596,855 Building $44,593 | |
| 2023 | $82,450.00 (+2.42%) | $7,344,723 Land $7,301,861 Building $42,862 | $5,384,250 |
| 2022 | $80,500.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 50 Elena Ave in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 1998.
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 | 2 in force |
| Nearby Flood Claims | 2 (1998) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
| Claims by Event |
|
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 50 Elena 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 95% of the US · lower than 97% 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 117 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 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: Etheric Networks, T-Mobile.
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