Alameda County property record for 6655 Giannini Ct, Castro Valley, CA 94552
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,228 sqft · built 1985 |
| Lot Size | 0.241 acres (10,500 sqft) |
| Owner | Individual Name on Record |
| Tax Bill | $5,471 (2025) |
| Deeds & Mortgages | Jul 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 85A-6404-47 |
| Primary APN | 85A-6404-47 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 2,228 sqft Living Area |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1985 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 10,500 sqft (0.241 acres) |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 6655 GIANNINI CT |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94552-5079 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00189 BLK: TR: 4468 |
| Legal Subdivision | TR 4468 |
| Legal Tract | 4468 |
| Legal Lot Number | 189 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 2 |
| Census Block | 2005 |
| Census Tract | 430101 |
Source: Alameda County records, as of August 5, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 153 13TH AVE, SAN MATEO, CA 94402-2424 |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | May 17, 2023 |
| Transfer Doc | 0000080490 |
| Record Updated | Sep 20, 2026 |
| Document Type | Transfer on Death Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Jul 14, 2023 |
| Property Address | 6655 GIANNINI CT, CASTRO VALLEY, CA 94552-5079 |
| Document Number | 0000080490 |
| Map Reference | MB 117 PG 1-14 |
| Instrument Date | May 17, 2023 |
| Instrument | 2023080490 |
| Transaction Type | Transfer |
| Record Updated | Aug 14, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 153 13TH AVE, SAN MATEO, CA 94402-2424 |
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 | $397,786 (+2%) Land $131,559 Building $266,227 | ||
| 2025 | $5,471.00 (+4.31%) | $389,987 (+4.04%) Land $128,980 Building $261,007 | |
| 2023 | $5,245.00 (+2.16%) | $374,846 (+2%) Land $123,972 Building $250,874 | $1,339,200 |
| 2022 | $5,134.00 | $367,497 Land $121,542 Building $245,955 |
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
| 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 | High above 76% of the US · above 52% of California |
|---|---|
| Wildfire Likelihood | 0.5% 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 411 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL | 100 / 20 |
May also be available: Etheric Networks.
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