San Mateo County property record for 518 State St, San Mateo, CA 94401
| Property Type | Duplex |
|---|---|
| Details | 5 bd · 2 ba · 1,830 sqft · built 1944 |
| Lot Size | 0.144 acres (6,250 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $560,000 (Oct 2012) |
| Tax Bill | $12,483 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 032-134-040 |
| Primary APN | 032-134-040 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 9 Rooms |
| Units | 2 Units |
| Stories | 1 Story |
| Building Area | 1,830 sqft Living Area |
| 1st Floor Area | 1,830 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1944 |
|---|---|
| Effective Year Built | Effective 1944 |
| Architectural Style | Duplex Single |
| Lot Area | 6,250 sqft (0.144 acres) |
| Lot Dimensions | 125 ft deep x 50 ft wide |
| Garage Type | Detached |
| Parking Spaces | 3 Parking Spaces |
| Street Address | 518 STATE ST |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94401-1614 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Local Zoning Code | R20000 |
| Legal Description | PARCEL 52 ASSESSORS MAP OF STUDIO TRACT LOT 46 STUDIO TRACT RSM 16/36 37 38 |
| Legal Subdivision | STUDIO TRACT |
| Legal Lot Number | 46 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 606000 |
Source: San Mateo County records, as of July 15, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 1337 5TH AVE, SAN FRANCISCO, CA 94122-2618 |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Oct 5, 2012 · Amount on Record |
| Deed Sale | Oct 5, 2012 · Amount on Record |
| Prior Sale | Apr 14, 2004 · Amount on Record |
| Deed Document Number | 2012146427 |
| Prior Transfer Date | Feb 3, 1994 |
| Prior Transfer Doc | 0000035158 |
| Record Updated | Oct 29, 2026 |
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 | $703,378 (+2%) Land $351,689 Building $351,689 | |
| 2025 | $12,483.00 (+11.98%) | $689,588 (+4.04%) Land $344,794 Building $344,794 |
| 2023 | $11,148.00 (-4.56%) | $662,812 Land $331,406 Building $331,406 |
| 2022 | $11,681.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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.
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 694 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 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile, Unwired.
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