Alameda County property record for 503 Castro St, San Leandro, CA 94577
| Property Type | Duplex |
|---|---|
| Details | 5 bd · 3 ba · 2,424 sqft · built 1896 |
| Lot Size | 0.145 acres (6,300 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $4,806 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 75-70-22-2 |
| Primary APN | 75-70-22-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 7 Rooms |
| Units | 2 Units |
| Stories | 2 Stories |
| Building Area | 2,424 sqft Living Area |
| Year Built | Built 1896 |
|---|---|
| Effective Year Built | Effective 1913 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 6,300 sqft (0.145 acres) |
| Street Address | 503 CASTRO ST |
|---|---|
| City | SAN LEANDRO |
| State | CA |
| Zip | 94577-3502 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Duplex |
| Legal Description | LOT: 00002 BLK: 0022 AR: 0075 PAGE: 0070 |
| Legal Subdivision | HEMME |
| Legal Lot Number | 20 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2024 |
| Census Tract | 432601 |
503 Castro St, a duplex, is owned and occupied by an individual who acquired it in November 2002.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 503 CASTRO ST, SAN LEANDRO, CA 94577-3502 |
| 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 | Name on Deed |
|---|---|
| Last Transfer Date | Nov 6, 2002 |
| Transfer Doc | 0000542073 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 503 Castro St was $4,806 with a homeowner's exemption.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Municipality | San Leandro City |
| Unified School District | San Leandro Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $305,805 (-0.28%) Land $106,095 Building $206,710 | ||
| 2025 | $4,806.00 Homeowner's exemption | $306,671 Land $104,014 Building $202,657 | |
| 2023 | $4,458.00 Homeowner's exemption | $320,765 Land $99,976 Building $220,789 | $716,040 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 503 Castro St in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective May 25, 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 503 Castro 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 | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 ppb (2022–2024) 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 243 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Starlink Satellite | 280 / 30 |
May also be available: Etheric Networks, GeoLinks, T-Mobile, Verizon.
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