Alameda County property record for 16603 Columbia Dr, Castro Valley, CA 94552
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 2,830 sqft · built 1988 |
| Lot Size | 0.156 acres (6,800 sqft) |
| Owner | Individual Name on File |
| Last Sale | $1,005,000 (Feb 2017) |
| Tax Bill | $14,549 (2025) |
| Deeds & Mortgages | Oct 2019 Mortgage Feb 2017 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 85-6315-45 |
| Primary APN | 85-6315-45 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 2,830 sqft Living Area |
| Year Built | Built 1988 |
|---|---|
| Effective Year Built | Effective 1988 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 6,800 sqft (0.156 acres) |
| Street Address | 16603 COLUMBIA DR |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94552-1662 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00049 BLK: TR: 5204 |
| Legal Tract | 5204 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 430200 |
16603 Columbia Dr is owned and occupied by an individual who bought it in February 2017.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 16603 COLUMBIA DR, CASTRO VALLEY, CA 94552-1662 |
| 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.
| Date | Document |
|---|---|
| Oct 11, 2019 | Deed of Trust, Mortgage · Conventional Mortgage ALLY BANK |
| Feb 24, 2017 | Grant Deed, Transfer GOOGAIN |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Feb 24, 2017 · Amount on File |
| Deed Sale | Feb 24, 2017 · Amount on File |
| Prior Sale | Jun 10, 2005 · Amount on File |
| Deed Document Number | 201748581 |
| Prior Transfer Date | Jul 17, 2003 |
| Prior Transfer Doc | 0000453591 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 16603 COLUMBIA DR, CASTRO VALLEY, CA 94552-1662 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | SERVICELINK |
| Name | Verified Name |
|---|
| Document Number | 0000206786 |
|---|---|
| Date | Oct 11, 2019 |
| Instrument | 2019206786 |
| Name | ALLY BANK |
|---|---|
| Type | Bank |
| Address | CHARLOTTE, NC 28202 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Oct 1, 2049 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Recording Date | Feb 24, 2017 |
| Property Address | 16603 COLUMBIA DR, CASTRO VALLEY, CA 94552-1662 |
| Document Number | 0000048581 |
| Instrument Date | Feb 17, 2017 |
| Instrument | 48581 |
| Transaction Type | Transfer |
| Record Updated | Mar 8, 2017 |
| Title Company | NORTH AMERICAN TITLE |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $1,105.50 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 16603 COLUMBIA DR CASTRO VALLEY CA 945521662, CASTRO VALLEY, CA 94552-1662 |
| Document Number | 48582 |
|---|---|
| Date | Feb 24, 2017 |
| Instrument | 48582 |
| Name | GOOGAIN |
|---|---|
| Address | SUNNYVALE, CA 94086 |
| Amount | Amount on Record |
|---|---|
| Term | 360 Months |
| Due | Feb 23, 2047 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 4.12% |
The 2025 property tax bill for 16603 Columbia Dr was $14,549 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 | $1,182,688 (+1.4%) Land $357,498 Building $832,190 | ||
| 2025 | $14,549.00 Homeowner's exemption | $1,166,362 Land $350,489 Building $815,873 | |
| 2023 | $14,020.00 Homeowner's exemption | $1,121,077 Land $336,881 Building $784,196 | $1,363,050 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 16603 Columbia Dr 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 16603 Columbia Dr is high, ranking above 76% of the US, with a 0.4% annual chance of wildfire.
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 | 0.4% annual chance |
| Exposure | Direct burnable vegetation |
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 92 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 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
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