San Mateo County property record for 91 de Bell Dr, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 2,210 sqft · built 1949 |
| Lot Size | 0.727 acres (31,647 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $6,428 (2025) |
| Deeds & Mortgages | Aug 2019 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 061-271-120 |
| Primary APN | 061-271-120 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Building Area | 2,210 sqft Living Area |
| 1st Floor Area | 2,210 sqft |
| Family Room | Family Room |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1949 |
| Lot Area | 31,647 sqft (0.727 acres) |
| Lot Dimensions | 193 ft deep x 166 ft wide |
| Garage Area | 700 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 91 DE BELL DR |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-2209 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | LOT 12 MAPLE MANOR RSM 24/39 TOWN OF ATHERTON |
| Legal Subdivision | MAPLE MANOR |
| Legal Lot Number | 12 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 611500 |
91 de Bell Dr is owner-occupied and held in a trust since March 2004.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 91 DE BELL DR, ATHERTON, CA 94027-2209 |
| 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 | Name on Deed |
|---|---|
| Last Transfer Date | Mar 23, 2004 |
| Transfer Doc | 0000064538 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 91 DE BELL DR, ATHERTON, CA 94027-2209 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0000062288 |
|---|---|
| Date | Aug 7, 2019 |
| Instrument | 2019-062288 |
| Name | US BANK NA |
|---|---|
| Type | Bank |
| Address | PORTLAND, OR 97204 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 91 de Bell Dr was $6,428 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 | $324,861 (+2%) Land $114,751 Building $210,110 | ||
| 2025 | $6,428.00 Homeowner's exemption | $318,492 Land $112,501 Building $205,991 | |
| 2023 | $6,061.00 (+2.76%) Homeowner's exemption | $306,127 Land $108,134 Building $197,993 | $4,745,340 |
| 2022 | $5,898.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 91 de Bell Dr 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 91 de Bell Dr is low, with 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 95% of the US · lower than 97% of California |
|---|---|
| Wildfire Likelihood | 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 167 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 Fiber · DSL | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: Sonic Telecom, T-Mobile.
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