San Mateo County property record for 86 Alejandra Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 6.5 ba · 10,598 sqft · built 2020 |
| Lot Size | 1.19 acres (52,063 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $135,889 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-250-080 |
| Primary APN | 070-250-080 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 6.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 15 Rooms |
| Stories | 2 Stories |
| Building Area | 10,598 sqft Living Area |
| 1st Floor Area | 5,125 sqft |
| 2nd Floor Area | 2,277 sqft |
| Basement Area | 3,196 sqft |
| Finished Basement | 3,196 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 2020 |
|---|---|
| Effective Year Built | Effective 2020 |
| Lot Area | 52,063 sqft |
| Lot Dimensions | 325 ft deep x 174 ft wide |
| Garage Area | 663 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 86 ALEJANDRA AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-4107 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | 1.19 AC MOL ON WLY LN OF ALEJANDRA AVE COM 210.27 FT NELY FRSLY LN OF LOT 2 PTN LOT 2 VALPARAISO PARK RSM 19/10 TOWN OF ATHERTON |
| Legal Subdivision | PARAISO PARK |
| Legal Lot Number | 2 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1003 |
| 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 | 2 Company Names on Record |
|---|---|
| Mailing Address | 86 ALEJANDRA AVE, ATHERTON, CA 94027-4107 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Feb 6, 2014 |
| Transfer Doc | 0000014582 |
| Record Updated | Sep 20, 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 | Menlo Park City Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $12,425,119 (+2%) Land $2,488,393 Building $9,936,726 | |
| 2025 | $135,889.00 (+4.78%) Homeowner's exemption | $12,181,490 (+4.04%) Land $2,439,601 Building $9,741,889 |
| 2023 | $129,685.00 (+2.41%) Homeowner's exemption | $11,708,469 Land $2,344,869 Building $9,363,600 |
| 2022 | $126,629.00 |
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 | 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.
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 | 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 253 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: GeoLinks, Race Communications, Sonic Telecom.
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