Alameda County property record for 18340 Joseph Dr, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,535 sqft · built 1954 |
| Lot Size | 0.119 acres (5,202 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $1,968 (2025) |
| Deeds & Mortgages | Sep 2021 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 84D-1209-1 |
| Primary APN | 84D-1209-1 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,535 sqft Living Area |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1955 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 5,202 sqft (0.119 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 18340 JOSEPH DR |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-2204 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00001 BLK: 0002 TR: 1236 |
| Legal Subdivision | TRACT 1236 |
| Legal Tract | 1236 |
| Legal Block | 2 |
| Legal Lot Number | 1 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 430300 |
18340 Joseph Dr is held in a trust since September 2021.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 3559 ERIS CT, WALNUT CREEK, CA 94598-4669 |
| Owner Type | Company |
| Vesting | Trust |
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 | Sep 13, 2021 |
| Transfer Doc | 0000328215 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Sep 30, 2021 |
| Property Address | 18340 JOSEPH DR, CASTRO VALLEY, CA 94546-2204 |
| Document Number | 0000328215 |
| Map Reference | MB 33 PG 81 |
| Instrument Date | Sep 13, 2021 |
| Instrument | 2021328215 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 3559 ERIS CT, WALNUT CREEK, CA 94598-4669 |
The 2025 property tax bill for 18340 Joseph Dr was $1,968.
Source: Alameda County assessment roll, as of August 5, 2026
| Type | Name |
|---|---|
| State | California |
| County | Alameda County |
| Unified School District | Castro Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $95,005 (+2%) Land $38,262 Building $56,743 | ||
| 2025 | $1,968.00 | $93,143 Land $37,512 Building $55,631 | |
| 2023 | $1,858.00 | $89,526 Land $36,055 Building $53,471 | $1,188,450 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 18340 Joseph Dr in Zone X, an area of minimal flood risk.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 1 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.
Wildfire risk around 18340 Joseph Dr is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 666 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 · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: Etheric Networks, T-Mobile, Unwired.
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