San Mateo County property record for 555 Middlefield Rd, Atherton, CA 94027 · Last verified July 2026
| Property Type | Public School (Administration, Campus, Dorms, Instruction) |
|---|---|
| Lot Size | 11.1 acres (483,516 sqft) |
| Owner | Company Name on File |
| Flood Zone | Zone X (minimal risk) |
| APN | 061-290-120 |
| Primary APN | 061-290-120 |
|---|
| Lot Area | 483,516 sqft |
|---|
| Street Address | 555 MIDDLEFIELD RD |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-3400 |
| Property Category | Public Works |
| Property Type | Public Works > Public School (Administration, Campus, Dorms, Instruction) |
| Legal Description | 11.10 AC MOL BEING ARB LOT 2 & NELY PTN ARB LOT 1 OF PARCEL 2 PER ASSESSORS MAP OF DONOHOE ESTATE |
| Legal Subdivision | DONOHOE ESTATE |
| Legal Lot Number | 2,1 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 611500 |
Source: San Mateo County records · APN 061-290-120
Assessment roll updated July 15, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 480 JAMES AVE, REDWOOD CITY, CA 94062-1041 |
| Owner Type | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: San Mateo County records · Assessment roll updated July 15, 2026 · Last verified July 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) |
Source: FEMA National Flood Hazard Layer, San Mateo County (06081C), updated September 10, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060816115001, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Nearby Flood Policies | 4 in force |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 167 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Race Telecommunications | Fiber | 10,000 / 10,000 |
| Xfinity | Cable | 2,000 / 250 |
| AT&T | Fiber | 1,000 / 1,000 |
| Verizon | Fixed Wireless | 300 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: Sonic Telecom, T-Mobile USA. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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