San Mateo County property record for 461 1st Ave, San Mateo, CA 94401
| Property Type | Commercial Office |
|---|---|
| Lot Size | 0.253 acres (11,000 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $498,000 (Aug 2003) |
| Tax Bill | $20,668 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 034-156-060 |
| Primary APN | 034-156-060 |
|---|
| Lot Area | 11,000 sqft (0.253 acres) |
|---|---|
| Lot Dimensions | 110 ft deep x 100 ft wide |
| Street Address | 461 1ST AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94401-3202 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Local Zoning Code | CH00C4 |
| Legal Description | 50 FT X 110 FT COR CLAREMONT AND 1ST AVE POR BLOCK 19 TOWN OF SAN MATEO VOL 2 MISC PG 95 |
| Legal Subdivision | TOWN OF SAN MATEO |
| Legal Block | 19 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1012 |
| Census Tract | 606202 |
461 1st Ave, a commercial property, is owned by a company that bought it in August 2003.
Source: San Mateo County records, as of July 15, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 441 1ST AVE, SAN MATEO, CA 94401-3202 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 13, 2003 · Amount on File |
| Deed Sale | Aug 13, 2003 · Amount on File |
| Deed Document Number | 2003226971 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 461 1st Ave was $20,668.
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 | $1,452,260 (+1.19%) Land $435,061 Building $1,017,199 | |
| 2025 | $20,668.00 | $1,435,199 Land $426,531 Building $1,008,668 |
| 2023 | $39,538.00 (+19.95%) | $1,412,101 Land $409,969 Building $1,002,132 |
| 2022 | $32,962.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 461 1st Ave 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 |
| Nearby Flood Claims | 1 (2022) |
| 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.
The area around 461 1st Ave 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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