Alameda County property record for 19087 Helton St, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 1,957 sqft · built 1975 |
| Lot Size | 0.149 acres (6,473 sqft) |
| Owner | Company Name on Record |
| Last Sale | $843,000 (Oct 2005) |
| Tax Bill | $14,379 (2025) |
| Deeds & Mortgages | Nov 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-1001-16 |
| Primary APN | 84C-1001-16 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Building Area | 1,957 sqft Living Area |
| Year Built | Built 1975 |
|---|---|
| Effective Year Built | Effective 1977 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 6,473 sqft (0.149 acres) |
| Street Address | 19087 HELTON ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3723 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 0000C BLK: PM: 0088 PAGE: 0045 |
| Legal Subdivision | PM 1772 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2009 |
| Census Tract | 430200 |
Source: Alameda County records, as of August 5, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 19087 HELTON ST, CASTRO VALLEY, CA 94546-3723 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 14, 2005 · Amount on Record |
| Deed Sale | Oct 14, 2005 · Amount on Record |
| Deed Document Number | 2005445551 |
| Last Transfer Date | Apr 24, 2013 |
| Transfer Doc | 0000177864 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Nov 8, 2022 |
| Property Address | 19087 HELTON ST, CASTRO VALLEY, CA 94546-3723 |
| Document Number | 0000183370 |
| Map Reference | MB 88 PG 45&46 |
| Instrument Date | Nov 2, 2022 |
| Instrument | 2022183370 |
| 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 | 19087 HELTON ST, CASTRO VALLEY, CA 94546-3723 |
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 | $1,167,955 (+1.39%) Land $352,486 Building $822,469 | ||
| 2025 | $14,379.00 (+3.78%) Homeowner's exemption | $1,151,925 (+4.04%) Land $345,577 Building $806,348 | |
| 2023 | $13,855.00 Homeowner's exemption | $1,107,204 Land $332,161 Building $775,043 | $1,126,080 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 |
| Nearby Flood Claims | 1 (1998) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1998 · rainfall accumulation |
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.
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 804 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 · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Etheric Networks, GeoLinks.
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