San Mateo County property record for 77 Walnut Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3.5 ba · 2,573 sqft · built 1925 |
| Lot Size | 0.15 acres (6,550 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $1,140,000 (Sep 2011) |
| Tax Bill | $23,304 (2025) |
| Deeds & Mortgages | Jun 2020 Line of Credit |
| Flood Zone | Zone X (minimal risk) |
| APN | 060-331-040 |
| Primary APN | 060-331-040 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,573 sqft Living Area |
| 1st Floor Area | 1,384 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 Type | Detached |
| Garage Area | 400 sqft |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 77 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 22 BLOCK A MENLO PARK VILLA LOTS RSM 1/93 TOWN OF ATHERTON |
| Legal Subdivision | MENLO PARK VILLA |
| Legal Block | A |
| Legal Lot Number | 22 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2023 |
| Census Tract | 611500 |
77 Walnut Ave is owner-occupied and held in a trust since July 2015.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 77 WALNUT AVE, ATHERTON, CA 94027-3820 |
| Occupancy | Owner Occupied |
| 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 | Sep 9, 2011 · Amount on File |
| Deed Sale | Sep 9, 2011 · Amount on File |
| Prior Sale | Mar 7, 2005 · Amount on File |
| Deed Document Number | 2011103023 |
| Last Transfer Date | Jul 21, 2015 |
| Transfer Doc | 0000085034 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 77 WALNUT AVE, ATHERTON, CA 94027-3820 |
| Transaction Type | Mortgage |
| Record Updated | Aug 5, 2022 |
| Name | Verified Name |
|---|
| Document Number | 0000050258 |
|---|---|
| Date | Jun 2, 2020 |
| Instrument | 2020-050258 |
| Name | CITIBANK NA |
|---|---|
| Type | Bank |
| Address | SIOUX FALLS, SD 57108 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 77 Walnut Ave was $23,304 with a homeowner's exemption.
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 | $1,902,236 (+2%) Land $1,153,052 Building $749,184 | ||
| 2025 | $23,304.00 Homeowner's exemption | $1,864,939 Land $1,130,444 Building $734,495 | |
| 2023 | $22,177.00 (+2.5%) Homeowner's exemption | $1,792,524 Land $1,086,549 Building $705,975 | $1,503,810 |
| 2022 | $21,636.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 77 Walnut Ave in Zone X, an area of minimal flood risk.
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.
Wildfire risk around 77 Walnut 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 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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