San Mateo County property record for 53 Walnut Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 750 sqft · built 1925 |
| Lot Size | 0.15 acres (6,550 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $798,000 (Jul 2009) |
| Tax Bill | $14,193 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 060-331-080 |
| Primary APN | 060-331-080 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 750 sqft Living Area |
| 1st Floor Area | 710 sqft |
| Family Room | Family Room |
| Year Built | Built 1925 |
|---|---|
| Effective Year Built | Effective 1925 |
| Lot Area | 6,550 sqft (0.15 acres) |
| Lot Dimensions | 131 ft deep x 50 ft wide |
| Garage Area | 140 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | None |
|---|
| Street Address | 53 WALNUT AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-3820 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | LOT 26 BLOCK A MENLO PARK VILLA LOTS RSM 1/93 TOWN OF ATHERTON |
| Legal Subdivision | MENLO PARK VILLA |
| Legal Block | A |
| Legal Lot Number | 26 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2023 |
| 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 Individual Names on Record |
|---|---|
| Mailing Address | 53 WALNUT AVE, ATHERTON, CA 94027-3820 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jul 1, 2009 · Amount on Record |
| Deed Sale | Jul 1, 2009 · Amount on Record |
| Prior Sale | Jan 31, 2003 · Amount on Record |
| Deed Document Number | 200987037 |
| Last Transfer Date | Apr 24, 2012 |
| Transfer Doc | 0000065015 |
| 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 | $1,050,663 (+2%) Land $987,474 Building $63,189 | ||
| 2025 | $14,193.00 (+5.32%) Homeowner's exemption | $1,030,062 (+4.04%) Land $968,112 Building $61,950 | |
| 2023 | $13,476.00 (+2.56%) Homeowner's exemption | $990,066 Land $930,520 Building $59,546 | $1,704,060 |
| 2022 | $13,140.00 |
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 99.1% of the US · lower than 99.2% 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 283 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Race Communications Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Etheric Networks, GeoLinks, T-Mobile.
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