Alameda County property record for 2122 173rd Ave, Castro Valley, CA 94546
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,215 sqft · built 1942 |
| Lot Size | 0.107 acres (4,650 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $440,000 (Dec 2015) |
| Tax Bill | $7,003 (2025) |
| Deeds & Mortgages | Jun 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 80A-231-6 |
| Primary APN | 80A-231-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,215 sqft Living Area |
| Year Built | Built 1942 |
|---|---|
| Effective Year Built | Effective 1956 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 4,650 sqft (0.107 acres) |
| Parking Spaces | 1 Parking Space |
| Street Address | 2122 173RD AVE |
|---|---|
| City | CASTRO VALLEY |
| State | CA |
| Zip | 94546-3812 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT: 00006 BLK: AR: 080A PAGE: 0231 |
| Legal Subdivision | EL PORTAL |
| Legal Lot Number | 462 |
| Jurisdiction | ALAMEDA CA |
| Township / Civil Division | HAYWARD |
| Census Block Group | 3 |
| Census Block | 3017 |
| Census Tract | 430500 |
2122 173rd Ave is owned and occupied by two individuals who bought it in December 2015.
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 2122 173RD AVE, CASTRO VALLEY, CA 94546-3812 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Dec 3, 2015 · Amount on File |
| Deed Sale | Dec 3, 2015 · Amount on File |
| Deed Document Number | 2015319278 |
| Prior Transfer Date | Nov 30, 2015 |
| Prior Transfer Doc | 0000319279 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | ALAMEDA CA |
| Property Address | 2122 173RD AVE, CASTRO VALLEY, CA 94546-3812 |
| Document Number | 0000149278 |
| Instrument Date | Jun 22, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Aug 19, 2020 |
| Title Company | CHICAGO TITLE COMPANY, CHICAGO TITLE CO |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 2122 173RD AVE CASTRO VALLEY CA 945463812, CASTRO VALLEY, CA 94546-3812 |
| Document Number | 0000149278 |
|---|---|
| Date | Jun 26, 2020 |
| Instrument | 149278 |
| Name | QUICKEN LNS |
|---|---|
| Type | Funding / Finance Company |
| Address | DETROIT, MI 48226-1906 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Jun 25, 2050 |
The 2025 property tax bill for 2122 173rd Ave was $7,003 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 | San Lorenzo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $524,273 (+0.66%) Land $159,382 Building $371,891 | ||
| 2025 | $7,003.00 Homeowner's exemption | $520,858 Land $156,257 Building $364,601 | |
| 2023 | $6,742.00 Homeowner's exemption | $500,635 Land $150,190 Building $350,445 | $628,470 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 2122 173rd Ave 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.
The area around 2122 173rd Ave has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 796 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 · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Etheric Networks, GeoLinks, T-Mobile, Unwired, Verizon.
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