San Mateo County property record for 3 Altree Ct, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 9 bd · 4.5 ba · 6,900 sqft · built 1901 |
| Lot Size | 1.9 acres (82,819 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $20,040 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 061-240-100 |
| Primary APN | 061-240-100 |
|---|
| Bedrooms | 9 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 18 Rooms |
| Stories | 3 Stories |
| Building Area | 6,900 sqft Living Area |
| Gross Area | 7,400 sqft |
| 1st Floor Area | 3,370 sqft |
| 2nd Floor Area | 2,920 sqft |
| Basement Area | 500 sqft |
| Family Room | Family Room |
| Study | Study |
| Fireplaces | 4 Fireplaces |
| Fireplace | Fireplace |
| Year Built | Built 1901 |
|---|---|
| Effective Year Built | Effective 1901 |
| Lot Area | 82,819 sqft |
| Garage Area | 3,212 sqft |
| Parking Spaces | 5 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 3 ALTREE CT |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-2223 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | LOT 4 ROBLE ESTATES RSM 49/32 TOWN OF ATHERTON |
| Legal Subdivision | ROBLE ESTATES |
| Legal Lot Number | 4 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 611500 |
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 | 3 ALTREE CT, ATHERTON, CA 94027-2223 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| 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 | $1,742,304 (+2%) Land $1,130,633 Building $611,671 | ||
| 2025 | $20,040.00 (+2.98%) Homeowner's exemption | $1,708,142 (+4.04%) Land $1,108,464 Building $599,678 | |
| 2024 | $19,460.00 (+2.07%) | ||
| 2023 | $19,065.00 (+2.37%) Homeowner's exemption | $1,641,816 Land $1,065,422 Building $576,394 | $4,895,550 |
| 2022 | $18,623.00 |
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 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | Under 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 273 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · DSL · 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, Race Communications, T-Mobile.
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