San Mateo County property record for 810 S Eldorado St, San Mateo, CA 94402
| Property Type | Duplex |
|---|---|
| Details | 4 bd · 2 ba · 3,035 sqft · built 1907 |
| Lot Size | 0.138 acres (6,025 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $420,000 (Mar 1999) |
| Tax Bill | $11,830 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 032-335-020 |
| Primary APN | 032-335-020 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 3,035 sqft Living Area |
| 1st Floor Area | 3,035 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1907 |
|---|---|
| Effective Year Built | Effective 1907 |
| Architectural Style | Duplex Single |
| Lot Area | 6,025 sqft (0.138 acres) |
| Lot Dimensions | 120 ft deep x 50 ft wide |
| Garage Area | 210 sqft |
| Parking Spaces | 4 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 810 S ELDORADO ST |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94402-1406 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R20000 |
| Legal Description | LOT 4 BLOCK 31 WESTERN ADDITION TO TOWN OF SAN MATEO RSM 1/52 53 |
| Legal Subdivision | WESTERN ADDITION TO TOWN OF SAN MATEO |
| Legal Block | 31 |
| Legal Lot Number | 4 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1014 |
| Census Tract | 606300 |
810 S Eldorado St, a duplex, is owned and occupied by two individuals who bought it in March 1999.
Source: San Mateo County records, as of July 22, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 8 S ELDORADO ST, SAN MATEO, CA 94401-3235 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
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 | Mar 1, 1999 · Amount on File |
| Deed Sale | Mar 1, 1999 · Amount on File |
| Deed Document Number | 199935831 |
| Prior Transfer Date | Feb 25, 1999 |
| Prior Transfer Doc | 0000035830 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 810 S Eldorado St was $11,830 with a homeowner's exemption.
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Mateo County |
| Municipality | San Mateo City |
| Elementary School District | San Mateo-Foster City Elementary School District (KG - 08) |
| Secondary School District | San Mateo Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $671,590 (+2%) Land $335,795 Building $335,795 | |
| 2025 | $11,830.00 Homeowner's exemption | $658,422 Land $329,211 Building $329,211 |
| 2023 | $11,021.00 (-2.92%) Homeowner's exemption | $632,856 Land $316,428 Building $316,428 |
| 2022 | $11,352.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 810 S Eldorado St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 5 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.
The area around 810 S Eldorado St has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 - SAN MATEO private · serves 103,536 people · EPA ID CA4110008 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Mar 2025 |
| Lead | 4 ppb (2023–2025) 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 791 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile.
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