Alameda County property record for 18508 Greenridge Ct, Castro Valley, CA 94552
| Property Type | Single Family Home |
|---|---|
| Details | 1,891 sqft · built 1976 |
| Lot Size | 0.176 acres (7,649 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $2,730 (2025) |
| Deeds & Mortgages | Sep 2017 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 85-1613-32 |
| Primary APN | 85-1613-32 |
|---|---|
| Alternative APN |
|
| Building Area | 1,891 sqft Living Area |
|---|---|
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1976 |
|---|---|
| Effective Year Built | Effective 1977 |
| Architectural Style | L-Shape |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Wood Shingle |
| Lot Area | 7,649 sqft (0.176 acres) |
| Garage Type | Attached |
| Heating System | Forced Air with A/C |
|---|---|
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 18508 GREENRIDGE CT |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94552-1810 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00002 BLK: TR: 3611 |
| Legal Tract | 3611 |
| Legal Lot Number | 2 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 1 |
| Census Block | 1009 |
| Census Tract | 430102 |
18508 Greenridge Ct is owner-occupied and held in a trust since September 1993.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 18508 GREENRIDGE CT, CASTRO VALLEY, CA 94552-1810 |
| Occupancy | Owner Occupied |
| 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 29, 1993 |
| Transfer Doc | 0000355991 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Sep 25, 2017 |
| Property Address | 18508 GREENRIDGE CT, CASTRO VALLEY, CA 94552-1810 |
| Document Number | 0000210753 |
| Instrument Date | Aug 18, 2017 |
| Instrument | 210753 |
| Transaction Type | Transfer |
| Record Updated | Oct 27, 2017 |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 18508 GREENRIDGE CT CASTRO VALLEY CA 945521810, CASTRO VALLEY, CA 94552-1810 |
The 2025 property tax bill for 18508 Greenridge Ct was $2,730 with a homeowner's exemption.
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 | $161,017 (-2.25%) Land $64,899 Building $103,118 | ||
| 2025 | $2,730.00 Homeowner's exemption | $164,723 Land $63,627 Building $101,096 | |
| 2023 | $2,591.00 Homeowner's exemption | $158,327 Land $61,156 Building $97,171 | $1,521,900 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 18508 Greenridge Ct 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.
Wildfire risk around 18508 Greenridge Ct is high, ranking above 71% of the US, with a 0.3% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 71% of the US · above 46% of California |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 389 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Unwired.
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