San Mateo County property record for 815 S B St, San Mateo, CA 94401
| Property Type | Other |
|---|---|
| Details | 1,000 sqft · built 1953 |
| Lot Size | 0.101 acres (4,400 sqft) |
| Owner | Company Name on File |
| Last Sale | $1,000,000 (Apr 2010) |
| Tax Bill | $9,171 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 034-197-040 |
| Primary APN | 034-197-040 |
|---|
| Stories | 1 Story |
|---|---|
| Building Area | 1,000 sqft Gross Area |
| 1st Floor Area | 1,000 sqft |
| Year Built | Built 1953 |
|---|---|
| Effective Year Built | Effective 1953 |
| Fire Resistance | Masonry Walls, Wood Interior |
| Lot Area | 4,400 sqft (0.101 acres) |
| Lot Dimensions | 110 ft deep x 40 ft wide |
| Street Address | 815 S B ST |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94401-4205 |
| Property Category | Other |
| Property Type | Other > Miscellaneous |
| Local Zoning Code | CL00C2 |
| Legal Description | LOT 4 BLOCK 5 HAYWARD ADDITION TO CITY OF SAN MATEO RSM D/61 |
| Legal Subdivision | HAYWARD ADDITION TO CITY OF SAN MATEO |
| Legal Block | 5 |
| Legal Lot Number | 4 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2021 |
| Census Tract | 606300 |
815 S B St is owned by a company that bought it in April 2010.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 1000 BRANNAN ST, 102, SAN FRANCISCO, CA 94103-4888 |
| Owner Type | Company |
| Vesting | Company |
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 Sale | Apr 1, 2010 · Amount on File |
| Deed Sale | Apr 1, 2010 · Amount on File |
| Prior Sale | Sep 14, 2006 · Amount on File |
| Deed Document Number | 201035598 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 815 S B St was $9,171.
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 | $658,301 (+2%) Land $645,142 Building $13,159 | |
| 2025 | $9,171.00 | $645,394 Land $632,493 Building $12,901 |
| 2023 | $8,238.00 (+1.63%) | $620,335 Land $607,934 Building $12,401 |
| 2022 | $8,106.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 815 S B St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective September 10, 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
The area around 815 S B 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 915 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 | 1,500 / 50 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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