Alameda County property record for 4170 David St, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,174 sqft · built 1947 |
| Lot Size | 0.208 acres (9,075 sqft) |
| Owner | Individual Name on File |
| Last Sale | $176,000 (Apr 2008) |
| Tax Bill | $4,005 (2025) |
| Deeds & Mortgages | Jan 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 84C-669-133 |
| Primary APN | 84C-669-133 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,174 sqft Living Area |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1947 |
|---|---|
| Effective Year Built | Effective 1947 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 9,075 sqft (0.208 acres) |
| Lot Dimensions | 165 ft deep x 55 ft wide |
| Street Address | 4170 DAVID ST |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-4624 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00005 BLK: 0001 TR: 0773 |
| Legal Tract | 0773 |
| Legal Block | 1 |
| Legal Lot Number | 5 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3010 |
| Census Tract | 430800 |
4170 David St is owned and occupied by an individual who bought it in April 2008.
Source: Alameda County records, as of August 5, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 4170 DAVID ST, CASTRO VALLEY, CA 94546-4624 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
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 Sale | Apr 29, 2008 · Amount on File |
| Deed Sale | Apr 29, 2008 · Amount on File |
| Prior Sale | Nov 13, 1995 · Amount on File |
| Deed Document Number | 2008143248 |
| Prior Transfer Date | Apr 15, 2008 |
| Prior Transfer Doc | 0000143248 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 4170 DAVID ST, CASTRO VALLEY, CA 94546-4624 |
| Transaction Type | Mortgage |
| Record Updated | Mar 18, 2021 |
| Name | Verified Name |
|---|---|
| Address | 4170 DAVID ST, CASTRO VALLEY, CA 94546-4624 |
| Document Number | 0000016776 |
|---|---|
| Date | Jan 13, 2021 |
| Instrument | 2021016776 |
| Name | LOANDEPOT.COM LLC |
|---|---|
| Type | Mortgage Company |
| Address | FOOTHILL RANCH, CA 92610 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 181 Months |
| Due | Feb 1, 2036 |
The 2025 property tax bill for 4170 David St was $4,005.
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 | $271,100 (+2%) Land $81,330 Building $189,770 | ||
| 2025 | $4,005.00 | $265,784 Land $79,735 Building $186,049 | |
| 2023 | $3,827.00 | $255,464 Land $76,639 Building $178,825 | $969,750 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 4170 David St 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 4170 David St 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 777 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 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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