San Mateo County property record for 170 Encinal Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3.5 ba · 5,040 sqft · built 1984 |
| Lot Size | 1.11 acres (48,598 sqft) |
| Owner | Company Name on File |
| Tax Bill | $21,057 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 061-340-330 |
| Primary APN | 061-340-330 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 5,040 sqft Living Area |
| 1st Floor Area | 2,760 sqft |
| 2nd Floor Area | 2,280 sqft |
| Family Room | Family Room |
| Year Built | Built 1984 |
|---|---|
| Effective Year Built | Effective 1984 |
| Lot Area | 48,598 sqft |
| Garage Area | 600 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 170 ENCINAL AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-3103 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10000 |
| Legal Description | PARCEL 5 1.115 AC MOL PARCEL MAP VOL 49/62 |
| Legal Subdivision | PARCEL MAP LARSON ESTATES UNIT 2 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1006 |
| Census Tract | 611500 |
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 | Company Name on File |
|---|---|
| Mailing Address | 170 ENCINAL AVE, ATHERTON, CA 94027-3103 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Sep 11, 1998 |
| Transfer Doc | 0000150164 |
| 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 | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,837,446 (+2%) Land $845,326 Building $992,120 | ||
| 2025 | $21,057.00 (+5.09%) Homeowner's exemption | $1,801,418 (+4.04%) Land $828,751 Building $972,667 | |
| 2023 | $20,037.00 (+2.38%) Homeowner's exemption | $1,731,469 Land $796,570 Building $934,899 | $5,984,370 |
| 2022 | $19,572.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 | 4 in force |
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 95% of the US · lower than 97% of California |
|---|---|
| Wildfire Likelihood | 0.01% 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 296 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, DSL 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, GeoLinks, Sonic Telecom, T-Mobile.
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