San Mateo County property record for 55 Belbrook Way, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 6,454 sqft · built 1949 |
| Lot Size | 1.01 acres (44,333 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $15,250,000 (Jun 2021) |
| Tax Bill | $182,291 (2025) |
| Deeds & Mortgages | Jun 2021 Sale Mar 2019 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 073-212-170 |
| Primary APN | 073-212-170 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 6,454 sqft Living Area |
| 1st Floor Area | 1,970 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 1949 |
|---|---|
| Effective Year Built | Effective 1949 |
| Lot Area | 44,333 sqft |
| Lot Dimensions | 6,784 ft deep x 6,784 ft wide |
| Garage Area | 770 sqft |
| Parking Spaces | 3 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 55 BELBROOK WAY |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-6405 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10000 |
| Legal Description | PARCEL 2 1.017 AC MOL PARCEL MAP VOL 58/83-84 |
| Legal Subdivision | MEZES RANCH |
| Legal Block | 2 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 611400 |
55 Belbrook Way is owner-occupied and held in a trust since June 2021.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 55 BELBROOK WAY, ATHERTON, CA 94027-6405 |
| 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.
| Date | Document |
|---|---|
| Jun 15, 2021 | Grant Deed, Transfer OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Mar 4, 2019 | Deed of Trust, Mortgage · ARM FIRST REPUBLIC BANK |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 15, 2021 · Amount on File |
| Deed Sale | Jun 15, 2021 · Amount on File |
| Deed Document Number | 202191019 |
| Prior Transfer Date | Aug 23, 2010 |
| Prior Transfer Doc | 0000098650 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Jun 15, 2021 |
| Property Address | 55 BELBROOK WAY, ATHERTON, CA 94027-6405 |
| Document Number | 0000091019 |
| Map Reference | VOL 58 PG 83&84 |
| Instrument Date | Jun 8, 2021 |
| Instrument | 2021-091019 |
| Transaction Type | Transfer |
| Record Updated | Jul 5, 2021 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Tax | $16,775.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 55 BELBROOK WAY, MENLO PARK, CA 94027-6405 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 55 BELBROOK WAY, ATHERTON, CA 94027-6405 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0000014837 |
|---|---|
| Date | Mar 4, 2019 |
| Instrument | 2019-014837 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Address | SAN FRANCISCO, CA 94111 |
| Type | ARM |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Apr 1, 2049 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 2.95% |
| Type Change Date | Jun 1, 2024 |
| Change Frequency | Annually |
| Min Rate At Change | 2.95% |
| Index | LIBOR |
| Max Rate | 10.9% |
The 2025 property tax bill for 55 Belbrook Way was $182,291 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 | Las Lomitas Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $16,837,230 (+2%) Land $8,418,615 Building $8,418,615 | |
| 2025 | $182,291.00 | $16,507,090 Land $8,253,545 Building $8,253,545 |
| 2023 | $177,305.00 (+2.83%) | $15,866,100 Land $7,933,050 Building $7,933,050 |
| 2022 | $172,419.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 55 Belbrook Way in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 2022.
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 |
| Flood Insurance Cost | Premium on File median of 10 policies |
| Nearby Flood Policies | 10 in force |
| Nearby Flood Claims | 1 (2022) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
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 55 Belbrook Way is low, with a 0.02% 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 | 0.02% 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 110 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 in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Cruzio, Etheric Networks, GeoLinks, T-Mobile, Verizon.
5G (outdoors only) and 4G LTE
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